View Full Version : 1/4 Mile Times??


smitht0789
04-20-2008, 11:39 PM
So im goin to the local track this Friday night to run my 8 for the first time, so i was hoping to get some average 1/4 mile times from everyone that has ran their car so far, so ill have the slightest idea? Thanks everyone!

Ike
04-20-2008, 11:40 PM
Most guys have run high 14's to low 15's. A couple people have gotten mid 14's like the mag cars have gotten.

YaXMaNGTO
04-21-2008, 12:24 AM
Cool. Give it your best shot, and have a good time... see what it'll do. Have you raced at the track any other time?

Just don't be too frustrated if you can't crank off a 14.xx run the first time to the track. It's normal.

kersh4w
04-21-2008, 01:13 AM
learn to search. it does wonders.

here's what a quick scan of racing section of the forum brought me.

http://www.rx8club.com/showthread.php?t=141923

14.4. first time dragger.

dozer
04-21-2008, 10:34 AM
high 7s on slicks

CyberPitz
04-21-2008, 10:38 AM
high 7s on slicks

I'm sure he can get into the low 7's with some NOZ stickers...

Mugatu
04-21-2008, 11:17 AM
Search Button FTW

smitht0789
04-21-2008, 11:30 PM
ya i did search it didnt come up witmuch...14s would be cool lol all's i have is k&n intake

YaXMaNGTO
04-21-2008, 11:35 PM
ya i did search it didnt come up witmuch...14s would be cool lol all's i have is k&n intake

There aren't any bolt on mods for the 8 that can compare to the driver mod. Skill and practice is the what will land you a 14, not a couple of hp and some extra noise from catback / intake.

05BlueRX8
04-21-2008, 11:43 PM
here in arizona i did 15.8 @90 mph however it was my first time at the track in a manual and I couldn't get the 60' times down my range was in the 2.5's. I also only had my exhaust and drop-in k&n air filter I also did a 15.9

http://www.theautolog.com/uploads/bluerx8/3981/600px/2005-Mazda-RX-8-7192.jpg
http://www.theautolog.com/uploads/bluerx8/3981/600px/2005-Mazda-RX-8-1853.jpg

sosonic
04-21-2008, 11:57 PM
here in arizona i did 15.8 @90 mph however it was my first time at the track in a manual and I couldn't get the 60' times down my range was in the 2.5's. I also only had my exhaust and drop-in k&n air filter I also did a 15.9

http://www.theautolog.com/uploads/bluerx8/3981/600px/2005-Mazda-RX-8-7192.jpg


15.8/15.9? Do you have an automatic? I got that before, and I'm a NA 4AT (I've done 15.3 too).

Oh wait, I see you have a manual and it was your first time. :)

A manual should get into the 14s with practice, everything is OK with the car, or with minor mods like air duct/air intake/less restrictive air filter, exhaust, flywheel, tires, etc....

Note- I think a 6AT with ECU mod, ATF cooler, air duct/intake/filter, and lots of practice runs might crack into the high 14s. ATs can't screw with the manual in the 0-60, but I've notice they have a chance in the 1/4 mile.

A NA RX-8 doing high 13s is close to a damn miracle and all kinds of conditions must be just right for such a miracle run. However, FI or maybe NOS RX-8s should be able to hit 13s.

A few FI RX-8s with lots of mods should be able to hit 12s. In theory, guys hitting greater than 300+ RWHP (375+HP at the crank) would have a shot of cracking into the 12s. I'm waiting though for that time slip and that FI kit, because I want to see all of their mods.

kersh4w
04-22-2008, 09:19 AM
i dont think so. a lightweight fidanza flywheel is .3 seconds. looking at the slip i posted that 14.48 - .3 = 14.18. the next .2 can be eliminated with an accessport, mazsport ignition, exhaust, lightweight rims.

i dont think it will impossible to get this car into the 13s. i dont even think it will be that hard. it just might cost some money. $750+600+600?+1200 (enkei rpf1)=$3150

05BlueRX8
04-22-2008, 10:06 AM
I did that with my borla exhaust and drop in air filter

NOW

I have alluminum crank pulley, alternator pulley, water pump pulley, intake, borla exhaust, tanabe lowering springs

So i'm really anxious to go and see how i do with some of the mods i've put on, just haven't had time nor money to go. I don't plan to go FI my personal goal is to get into the low 15's i'm not trying for anything faster if it happens it happens.

kersh4w
04-22-2008, 11:48 AM
you also have chromed out rims. that just negated any gains.

have you weighed your rims?

and a stock rx8 can easily hit 14s. easily. dont shoot for 15s. shoot for mid 14s.

smitht0789
04-22-2008, 01:07 PM
thanks for everyones comments again, im gonna practice launching and what not b4 i go..anyone have a rpm that they launch at while at the track? how about the "DSC"? should that be turned off or left on?

05BlueRX8
04-22-2008, 01:19 PM
you also have chromed out rims. that just negated any gains.

have you weighed your rims?

and a stock rx8 can easily hit 14s. easily. dont shoot for 15s. shoot for mid 14s.


nope haven't weighed my rims but the s.o.b's are heavy i'll tell you that.

Well i'm in arizona so the elevation is alot different...i'm not sure here what an rx8 can do stock. I just have to figure out what i need to launch at. I tried high rpms, i tried low, i tried mid...just have to work at it.

i hate my rims btw....lol
http://www.theautolog.com/uploads/bluerx8/3981/600px/2005-Mazda-RX-8-6630.jpg
http://www.theautolog.com/uploads/bluerx8/3981/600px/2005-Mazda-RX-8-6539.jpg

YaXMaNGTO
04-22-2008, 07:24 PM
i dont think so. a lightweight fidanza flywheel is .3 seconds. looking at the slip i posted that 14.48 - .3 = 14.18. the next .2 can be eliminated with an accessport, mazsport ignition, exhaust, lightweight rims.

i dont think it will impossible to get this car into the 13s. i dont even think it will be that hard. it just might cost some money. $750+600+600?+1200 (enkei rpf1)=$3150

Ricer math FTL... :bootyshak

mja64
04-22-2008, 08:19 PM
just make sure to not drive though the waterbox, go around it unless you run slicks. i hate going on street nights for that reason. water dripping off of radials makes for louzy launches. good luck and be safe!

chancejat
04-22-2008, 08:27 PM
water= wheel hop=crappy 60ft=low times...........and a 15.8 has got to be the lowest time ive ever heard of a mt rx8.....

RedefineRX8
04-22-2008, 08:27 PM
Ricer math FTL... :bootyshak

hate to say it, but I agree with you.

This car isn't that fast at all in a straight line NA even with your bolt ons. Just deal with it and enjoy it. I almost got mad when I expirimented with a buddy who has a DC2 GSR with intake header and exhaust and on a third gear pull I only had a car on him before letting off right at the beginning of 4th... sad considering all of the mods I have on this car. It is what it is, just have fun with it and don't bother getting frustrated by all the tuned econoboxes and v8s slap ya around a bit at the track lol

fahrfegneugen
04-22-2008, 09:14 PM
^word :)

Ike
04-22-2008, 10:54 PM
hate to say it, but I agree with you.

This car isn't that fast at all in a straight line NA even with your bolt ons. Just deal with it and enjoy it. I almost got mad when I expirimented with a buddy who has a DC2 GSR with intake header and exhaust and on a third gear pull I only had a car on him before letting off right at the beginning of 4th... sad considering all of the mods I have on this car. It is what it is, just have fun with it and don't bother getting frustrated by all the tuned econoboxes and v8s slap ya around a bit at the track lol

Dude, you're just modding wrong. Get a custom made super duper light flywheel and you could shave .5 off your 1/4 time!:rollingla

RedefineRX8
04-22-2008, 10:59 PM
Dude, you're just modding wrong. Get a custom made super duper light flywheel and you could shave .5 off your 1/4 time!:rollingla

LOL. Flywheel is one thing that does make a 'noticable' difference NA compared to everything else. After driving my friends 500awhp evo I've just given up ever trying to get this car to be straight line FAST staying NA. It's quick, but not fast. Big difference.

05BlueRX8
04-22-2008, 11:09 PM
i always go around the waterbox *nods* but when i went for the first time i kept spinning in first or wheel hopping a little

RedefineRX8
04-22-2008, 11:10 PM
don't let anyone bother you, there's nothing wrong with not running the fastest 1/4 mile time. Just have fun out there!

05BlueRX8
04-22-2008, 11:14 PM
no ones bothering me. rx8's aren't 1/4 mile cars..i know this :) i just prefer the 1/4 mile 'cause when i was growing up something happened with a few friends that makes me hate turning sharp or sliding.

kersh4w
04-22-2008, 11:36 PM
just watch me. i'll prove all of you wrong!

:P

this car WILL hit 13s n/a. even if i have to spend 10k to do it.

RedefineRX8
04-22-2008, 11:39 PM
I'm not saying it's impossible to hit a 13 NA. Even you do hit a 13, it won't change the fact that a NA rx-8 will never be fast (in a straight line), period.

Ike
04-22-2008, 11:40 PM
just watch me. i'll prove all of you wrong!

:P

this car WILL hit 13s n/a. even if i have to spend 10k to do it.

Please do, I'll get a good laugh out of someone spending thousands of dollars so they can run high 13's.

05BlueRX8
04-22-2008, 11:43 PM
lol nuff said haha..ya'll are so cruel not really..i'm just trying to get to the low 15's that sounds reasonable haha

Ike
04-23-2008, 12:00 AM
lol nuff said haha..ya'll are so cruel not really..i'm just trying to get to the low 15's that sounds reasonable haha

Hey, just go out there and have fun. Often the people that seem to be having the most fun at the strip are the ones out there with their 4 cylinder AT Camry or the like.

Also, modding just to try to hit some number is pretty silly. If you just want to make your car faster because you're not happy with the power, fine. But to spends thousands just to hit a number you're simply setting yourself up for disappointment. Especially when you realize the guy with the DSM or ragged out Z28 that just blew your doors off spent less on his whole car and all his mods than you spent to run a 13.9.

kersh4w
04-23-2008, 12:06 AM
i love modding my car. tracking is expensive and i have to travel huge distances.

i have 2 1/4 within 30 minutes of my house. which makes more sense?

Ike
04-23-2008, 12:16 AM
i love modding my car. tracking is expensive and i have to travel huge distances.

i have 2 1/4 within 30 minutes of my house. which makes more sense?

I grew up racing karts and then shifter karts. I also started doing trackdays as soon as I was able. So, all my early experience was on a roadcourse. That said, I love going to the strip. Any true car enthusiats should be able to see the fun and skill involved in drag racing. There are plenty of elitist jackasses out there that turn their nose up at drag racing, but most of them have probably never been to the strip and the ones that have probably realized it's not as easy as they thought so it's easier to just disregard it. In short, I encourage you to go to the strip, it's a blast. However, mod the car the way you want and let the numbers sort themselves out.

Renesis07
04-23-2008, 01:23 AM
I actually think I might be dragging mine for the first time tomorrow also :) If I have a chance to make it up to sacramento. Im hoping for 14's.

sosonic
04-23-2008, 02:33 AM
Please do, I'll get a good laugh out of someone spending thousands of dollars so they can run high 13's.

Word. 10K? Go FI and with the right kit and mods you have a shot at 12s. A 12 second RX-8, would make people stand up and notice.

You are not going to get any "respect" from hard core "draggers" out there until you are doing the 1/4 mile in the 12s anyway.

When you start hitting 12s then you are coming close to expensive and very high performance cars like stock 911 Porsches (however if they do any mods, you are toast as they can get under 10s).

14s and 15s, etc.... are not serious times to draggers. Those are just for fun and to see how quick you can get your street car or daily driver, or check a new mod.

13s are considered "quick" (not "fast mind you, but quick), so that is a fun goal. The thing is that 13s for an RX-8 would usually require FI, NOS, or lots of NA mods (and getting real lucky with a particularly sweet engine).

Renesis07
04-23-2008, 11:15 AM
cant you hit 12's in this car with the right turbo set up and some laughing gas? lol. Not saying the car will last long but it would last for 12 seconds wouldnt it? :lol:

05BlueRX8
04-23-2008, 11:22 AM
lol sounds like fun haha

Renesis07
04-23-2008, 11:27 AM
IT would be the best 12 seconds ever.......

Red Devil
04-23-2008, 11:37 AM
cant you hit 12's in this car with the right turbo set up and some laughing gas? lol. Not saying the car will last long but it would last for 12 seconds wouldnt it? :lol:

Running 12s on a Renesis shouldn't be a big deal, and it can be built to last. Contrary to all the BS claims on this forum the Renesis is very structurally sound and can competently withstand high hp cylinder pressures. Any Mazsport, and others, equipped car can do it. No time slips to back it that I've seen, but the power is clearly there. The rest of the powertrain, however, is another issue.

And let's be honest, in today's environment a car that runs in the 12s isn't a big deal.

Renesis07
04-23-2008, 11:44 AM
Running 12s on a Renesis shouldn't be a big deal, and it can be built to last. Contrary to all the BS claims on this forum the Renesis is very structurally sound and can competently withstand high hp cylinder pressures. Any Mazsport, and others, equipped car can do it. No time slips to back it that I've seen, but the power is clearly there. The rest of the powertrain, however, is another issue.

And let's be honest, in today's environment a car that runs in the 12s isn't a big deal.

I completely agree with you there. The big deal in most peoples eyes is after all the money you would spend to make an RX8 run 12's, you couldve bought a used Corvette C6 and run 12's stock with an AT.

* In my opinion, I would rather take an RX8 and make it my project and over the years enjoy it and eventually make it fast, as more stuff comes out and the aftermarket demand for RX8 parts increase, we'll start seeing more rx8s in the 12's over the years. I think its more rewarding to work on this car, a stock vette isnt as cool as a Turbo RX8 that was built by yourself. Again, just my worthless opinions :lol:

mja64
04-23-2008, 08:03 PM
if i had a dime for every old grey haired dude driving a c6 vette i could buy that pettite s/c kit i've been drooling over. i'm coming from a 10 second car to a 14-15 second car, but you know what? i dont care, i know how big mine is. i dont need to prove it to anyone else. shoot my wifes tl toasts my 8 lol. who cares.

sosonic
04-23-2008, 08:31 PM
I completely agree with you there. The big deal in most peoples eyes is after all the money you would spend to make an RX8 run 12's, you couldve bought a used Corvette C6 and run 12's stock with an AT.

* In my opinion, I would rather take an RX8 and make it my project and over the years enjoy it and eventually make it fast, as more stuff comes out and the aftermarket demand for RX8 parts increase, we'll start seeing more rx8s in the 12's over the years. I think its more rewarding to work on this car, a stock vette isnt as cool as a Turbo RX8 that was built by yourself. Again, just my worthless opinions :lol:

You have to factor in the possibly of turboing a used RX-8, if you are talking a used vette. The trick with the used RX-8 is to do an engine compression check. If the engine is still sound, there is nothing wrong with an used RX-8, and you should be able to get them pretty cheap too (cheap is relative though to your budget).

I think 10K should get you 12s. You might even be able to do it for under 7K. There is no reason why a person can't get a slight used or heavily discount last year RX-8 in the low 20K range. Go older models and we are talking 15K or so. That means you could in theory have a 12s FI RX-8 for 22K to 25K.

There is also no reason why, the Greddy kit and MazdaManic Upgrade Greddy turbo kit, and at the right psi can't get 12s.

However, you will have to upgrade more than just the turbo, to make it reliable. So fuel pump, ignition, and other bits.... Still... you may have a shot to do it all for under 7K to 8K.

Other turbo, the Pettit Supercharger kit, I would expect the Hymee Supercharger should be able to pull off high 12s too and provided the driver puts the time and money in.

For a rotary fan, an RX-8 running 12s would be a lot more satisfying than doing it in a vette. Plus, there is that "surprise factor" and "street respect". "Holy sh*t, did you see how fast that RX-8 is, I thought they could not do that".

Eventually, over the years, I expect those people that continually tinker and with all kinds of mods on their RX-8 to even break into high 11s.

05BlueRX8
05-12-2008, 10:28 PM
sorry to veer off topic but...smitht0789, did you ever go to the track? How did you do?

smitht0789
05-12-2008, 10:56 PM
haha, yeah sorry bout that. i didnt end up going that friday due to the weather, but im reallly gouing this friday, so ill for sure let yaknow!

YaXMaNGTO
05-13-2008, 12:02 AM
haha, yeah sorry bout that. i didnt end up going that friday due to the weather, but im reallly gouing this friday, so ill for sure let yaknow!

Good luck... yah, let us know.

Okay, I'll get preachy for a minute, with a little advice...

Don't get too amped! Just take it easy and do "street start" launch the first time, and see what it's like to race the 8. Don't go revving it up to 6000rpm and drop the clutch.

Also, if you wheelhop on a run, which the RX8's have a tendency to do, DON'T TRY TO DRIVE THROUGH IT (it wont work)... just let off the accelerator until it stops hopping, get back on it, and use the "blown" run to work on your shifts. If you could see your car from the outside wheelhopping, you'd definitely be "YIKES! THAT'S GONNA BREAK SOMETHING!!!"

05BlueRX8
05-13-2008, 01:16 AM
good advice there. wish i had known that when i went to the track the first time. I still need to figure out what works for me.


good luck smitht0789 let us know how you do!

Falken
05-13-2008, 07:32 AM
i dont think so. a lightweight fidanza flywheel is .3 seconds. looking at the slip i posted that 14.48 - .3 = 14.18. the next .2 can be eliminated with an accessport, mazsport ignition, exhaust, lightweight rims.

i dont think it will impossible to get this car into the 13s. i dont even think it will be that hard. it just might cost some money. $750+600+600?+1200 (enkei rpf1)=$3150

Can anyone confirm that? Does a lighter flywheel really lop .3 off you time?

Renesis07
05-13-2008, 11:41 AM
I wound up going like I said, I ran a 15.5 @ 89 mph. That was my first time ever going and I couldnt launch for shit.

kersh4w
05-13-2008, 08:55 PM
Can anyone confirm that? Does a lighter flywheel really lop .3 off you time?

according to CRH it does. he also sells flywheels. :eyetwitch

but lightweight flywheels definitely help your time. read this. http://www.uucmotorwerks.com/flywheel/how_a_lightweight_flywheel_works.htm

losing 300lbs in first gear definitely helps things out.

chancejat
05-13-2008, 09:11 PM
damn now im gonna buy a flywheel...you should be in sales.....

Eric1987
05-14-2008, 01:28 AM
What do you think it'd take to get the RX8 on terms with a stock S2000 in straight line speed?

neXib
05-14-2008, 02:30 AM
I'd say a shortshift could give the same advantage as a light flywheel depending on your shiftskills in a drag. Afaik the RX-8 has a tight gearbox, so with a shortshift you'd probably be able to really smoothly accelerate without much effort.

Has anyone tried running with light 15" alloys? :)

Renesis07
05-14-2008, 11:52 AM
I'd say a shortshift could give the same advantage as a light flywheel depending on your shiftskills in a drag. Afaik the RX-8 has a tight gearbox, so with a shortshift you'd probably be able to really smoothly accelerate without much effort.

Has anyone tried running with light 15" alloys? :)

Im successfully running with 18" alloys :lol:

RedefineRX8
05-14-2008, 03:18 PM
What do you think it'd take to get the RX8 on terms with a stock S2000 in straight line speed?

My 2 best friends have s2000s, one is an AP1 and the other an AP2. For power adders on my car I have the AEM intake, Racing Beat flash, HKS hi-power, AP pulley, Mazsport Dual Resonated Midpipe and Z-Ent grounding wires. My car is also a sport 6MT model without the leather or sunroof.

When I race the AP1 s2000 (HKS Hi-power, T1R grounds, AEM intake, ACT clutch) in 3rd gear pulls, he gets me by a small amount. I have since added the Mazsport Ignition Solution, and haven't tried to see where I stand yet against it with that installed.

The AP2 is stock, and that car is significantly faster than a stock 8 in 2nd and 3rd gear.

I'll need a lightweight flywheel to do the job on both of them, then nitrous for a finishing touch :)

Anyone who says they beat these cars with a heavier GT at rolls with less mods than mine is either racing people who can't shift to save their lives or jumping hard. S2k is definitely a bit faster stock than a RX8.

Renesis07
05-14-2008, 04:24 PM
My 2 best friends have s2000s, one is an AP1 and the other an AP2. For power adders on my car I have the AEM intake, Racing Beat flash, HKS hi-power, AP pulley, Mazsport Dual Resonated Midpipe and Z-Ent grounding wires. My car is also a sport 6MT model without the leather or sunroof.

When I race the AP1 s2000 (HKS Hi-power, T1R grounds, AEM intake, ACT clutch) in 3rd gear pulls, he gets me by a small amount. I have since added the Mazsport Ignition Solution, and haven't tried to see where I stand yet against it with that installed.

The AP2 is stock, and that car is significantly faster than a stock 8 in 2nd and 3rd gear.

I'll need a lightweight flywheel to do the job on both of them, then nitrous for a finishing touch :)

Anyone who says they beat these cars with a heavier GT at rolls with less mods than mine is either racing people who can't shift to save their lives or jumping hard. S2k is definitely a bit faster stock than a RX8.

Agreed, just by looking at 1/4 mile times, the times arent too much different but the trap speed is significantly different, concuring your statement that an S2000 will pull away in 3rd. :)

Ike
05-15-2008, 03:13 AM
Agreed, just by looking at 1/4 mile times, the times arent too much different but the trap speed is significantly different, concuring your statement that an S2000 will pull away in 3rd. :)

S2K's can run high 13's stock (13.8 is the best I've seen), as you've found out running just a mid 14 in an RX-8 is a lofty goal.

VikingDJ
05-15-2008, 05:05 AM
I can vouch for the S2K. It's noticably faster then my RX8 was. The AP2 of course has added power and torque over the AP1. It's listed as the same HP, but dynos have shown the car gained about 10whp as well as the increased torque.

Spinning Sushi
05-15-2008, 05:14 AM
I'd say a shortshift could give the same advantage as a light flywheel depending on your shiftskills in a drag. Afaik the RX-8 has a tight gearbox, so with a shortshift you'd probably be able to really smoothly accelerate without much effort.

Has anyone tried running with light 15" alloys? :)

The brakes on the MTs WILL NOT clear anything below a 15.5'' inside circumference.

eviltwinkie
05-16-2008, 10:48 AM
I'm not saying it's impossible to hit a 13 NA. Even you do hit a 13, it won't change the fact that a NA rx-8 will never be fast (in a straight line), period.

i dont think so. a lightweight fidanza flywheel is .3 seconds. looking at the slip i posted that 14.48 - .3 = 14.18. the next .2 can be eliminated with an accessport, mazsport ignition, exhaust, lightweight rims.

i dont think it will impossible to get this car into the 13s. i dont even think it will be that hard. it just might cost some money. $750+600+600?+1200 (enkei rpf1)=$3150

If I get a chance, I'll get down to the SA strip and get a time slip...

I've got the AP, Rev8, RPF1, KDW2 275/35...along with an assortment of crap I cant even recall anymore...

Anywho...we will see what it all adds up to hopefully...according to the AP (which I do not trust), my 1/4 is already in the low 14's...and I'm still working on setup...

YaXMaNGTO
05-16-2008, 07:22 PM
Okay, critical thinkers, does anything jump out at you about the so-called "virtual performance gain" numbers for a lightened flywheel? Ike, you're not allowed to play. Let the other students answer one.

The claim is that it's worth .3 seconds in the quarter mile...


As for the "virtual" weight loss of a typical lightweight flywheel in the 3-series or M3, we've prepared the full mathematical analysis:

M3 and 3-series "virtual" weight lost:
1st gear 346.5 lbs.
2nd gear 133.15 lbs.
3rd gear 68.9 lbs.
4th gear 46.18 lbs.
5th gear 36.15 lbs.
6th gear 30.04 lbs.

A general rule of thumb for weight loss equivalence to "gained" power is approximately 10lbs/hp

M3 and 3-series "virtual" performance gain:
1st gear 34.6 hp
2nd gear 13.3 hp
3rd gear 6.9 hp
4th gear 4.6 hp
5th gear 3.6 hp
6th gear 3 hp

eviltwinkie
05-16-2008, 09:20 PM
Okay, critical thinkers, does anything jump out at you about the so-called "virtual performance gain" numbers for a lightened flywheel? Ike, you're not allowed to play. Let the other students answer one.

The claim is that it's worth .3 seconds in the quarter mile...

It simply affects power delivery...only way its worth .3s in the 1/4 is if its coupled with lightening everything else up in the drive train as much as possible...

Only thing I have left to replace is the rotors and flywheel...everything else has been swapped out...

Flywheel and clutch is next as soon as I can get the car to the dealer to get the trans replaced...

Heh...I'm gunning for you dude...I'm not going to go down quietly...haa haa

chancejat
05-16-2008, 09:42 PM
virtual gain would be different for every car, it depends on the difference in weight of the flywheel vs stock and the hp/lb ratio of the car and gear ratios as well and 10lb/hp is not true either....its really messed up but you kinda get the idea

YaXMaNGTO
05-16-2008, 10:12 PM
Only thing I have left to replace is the rotors and flywheel...everything else has been swapped out...

Flywheel and clutch is next as soon as I can get the car to the dealer to get the trans replaced...

Heh...I'm gunning for you dude...I'm not going to go down quietly...haa haa

Don't make me change my sparkplugs :lol2:

13bturbofc
05-16-2008, 10:19 PM
yeah if im going to the track im taking my 400whp 2nd gen rx7 not the N/A rx8 . dont get me wrong i love my 8 but N/A rotaries are not very fast unless you mod them to the point that its no longer good for a daily driver.

eviltwinkie
05-16-2008, 10:29 PM
Don't make me change my sparkplugs :lol2:

Man I gotta take a pic of the plugs...I would never have believed it made such a difference...it like...added a whole .025 ft/lbs of raw unadulterated torque...

It almost made me pee myself...it was THAT noticeable...heh

Seriously...ha

Fer reals...

eviltwinkie
05-16-2008, 10:34 PM
yeah if im going to the track im taking my 400whp 2nd gen rx7 not the N/A rx8 . dont get me wrong i love my 8 but N/A rotaries are not very fast unless you mod them to the point that its no longer good for a daily driver.

bah dude...no way...mine is totally a daily driver...and totally had its warranty voided in unholy ways...

shes lovely for track days...and a kitten on the twistehs on the way home...hot off the track...

still have A/C and a radio...which is all i need...

and according to the CobbAP i'm a 5.6s 0-60 14.2 1/4mi N/A! haa haa...

told my bud in SA to setup a track night with the local cobra boys...see if i can get in with them on the cheap for a few runs...see how accurate the Cobb is...

i'm sure its going to be hella off...

YaXMaNGTO
05-16-2008, 11:36 PM
virtual gain would be different for every car, it depends on the difference in weight of the flywheel vs stock and the hp/lb ratio of the car and gear ratios as well and 10lb/hp is not true either....its really messed up but you kinda get the idea

It may not apply to lower hp cars, but the "1 hp to make up 10 lbs" is surprisingly accurate as you climb into the 400-500-600hp range. Basically, you can equate for every 100 lbs more you weigh, you have to have 10 whp in order to compensate. Example is with the GTO vs a C6 corvette. GTO is 3750lbs and Vette is around 3200 lbs. In order to match the C6, which traps 112mph, I have to come up with 55 whp to make up for the difference in weight. Stock GTO's dyno 345 whp, and modded GTO's that make 400 whp commonly trap 112mph. This 10 whp / 100 lbs. has been accurate in many other comparisons and racing we've done.

The other general equation to use is that you'll need 10 whp or weight reduction of 100 lbs. to decrease your quarter mile ET by a tenth of a second. This where the "virtual flywheel power" argument falls on its face. I completely agree that 30whp increase will buy you .3 seconds in ET, but if you reference the chart, power decreases at least in half for each gear after 1st. You don't even use the extra power in 1st gear when launching at high RPMs, and you're stuck with just 7hp gain for all of 3rd? No way you'll get .3 seconds from a flywheel.

The last one is you can gain 8-9mph of trapspeed for every 100 whp. A good example is a stock RX8 vs. the Protech turbo RX8. A stock RX8 traps 95mph with 175whp on the dyno. The Protech RX8 made 330whp and trapped 109mph.

Some may confuse this as ricer math. It's not. You can use these calculations to assist in estimating the level of mods you'll need to keep up with cars that have more hp or less weight than you have.

smitht0789
05-16-2008, 11:54 PM
so i went to the track tonight for the first time, and ran 3 times, with my first and best time being at 15.7

13bturbofc
05-17-2008, 09:11 AM
bah dude...no way...mine is totally a daily driver...and totally had its warranty voided in unholy ways...

shes lovely for track days...and a kitten on the twistehs on the way home...hot off the track...

still have A/C and a radio...which is all i need...

and according to the CobbAP i'm a 5.6s 0-60 14.2 1/4mi N/A! haa haa...

told my bud in SA to setup a track night with the local cobra boys...see if i can get in with them on the cheap for a few runs...see how accurate the Cobb is...

i'm sure its going to be hella off...

well 14.2 is quick for a N/A rotary, im referring to the guys with the huge bridge ports that are running 10s... they are no longer DD. im running 11.5s in my 2nd gen and while its fun as hell on the street its not comfortable at all and now that i have to have a roll cage i cant even recline my seat lol

Renesis07
05-17-2008, 12:05 PM
so i went to the track tonight for the first time, and ran 3 times, with my first and best time being at 15.7

Dont feel bad, Ive went 2 times so far and had 5-6 runs and my best time so far is 15.5@89 mph. These cars are tough for drag racing but its still fun. I get a tiny bit better of a time each time I go.

YaXMaNGTO
05-17-2008, 12:54 PM
The Cobb AP has a timer and just reads off the speedo, right?
An accelerometer based device like the gtech would probably be more accurate, but the Cobb could be used to measure relative performance change.

If you want to do a side by side, I have a Beltronics FX2... might be interesting.

smitht0789
05-17-2008, 03:38 PM
no i have a 6 speed, and ya, its still a good time. im glad i went, im sure ill do better next time, i have no read what so ever on my tires either, so i spun alot, but jus got a new set of tires, and am putting them on whenever i get time!

Razz1
05-23-2008, 08:17 PM
The Ap unit from Cobb will help you achieve your goals.