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-   -   Best way to get 200whp NA? (https://www.rx8club.com/series-i-aftermarket-performance-modifications-23/best-way-get-200whp-na-159194/)

byez 10-23-2008 12:01 AM

Best way to get 200whp NA?
 
Cheapest way to dyno at 200whp while staying naturally aspirated?

Lets see some of your ideas.

05rex8 10-23-2008 12:02 AM

cobb accessport from MM
catless midpipe


and an electric supercharger....

hehe j/k

Jedi54 10-23-2008 12:03 AM

AP
high flow cat / midpipe
exhaust

Easy_E1 10-23-2008 12:15 AM

We had a local guy do 205 WHP with open exhaust (straight pipe) and the Racing Beat intake. He's just a freak of nature.
The Cobb Accessport and CAI intake and Catless exhaust is your best bet. Toss in the BHR Yukon Coil upgrade and you should be good.

Musker 10-23-2008 09:21 AM

electric supercharger... hmmm.... =]

heyarnold69 10-23-2008 09:29 AM

intake -- hks, aem, Racing beat with ram
exhaust of soem type -- borla, hks, greddy
sr high flow cat -- im a tree hugger! (sorta)
cobb from mm
stickers! hehe

Dmac710 10-23-2008 01:13 PM

I made 202whp on a mustang dyno with just a K&N drop in filter and turboxs header back exhaust!
http://i88.photobucket.com/albums/k1...twun/dyno2.jpg

IXC-RX8 10-23-2008 05:55 PM

wich is best cltuch for NA?

tiltmode43 10-23-2008 06:17 PM


Originally Posted by IXC-RX8 (Post 2696508)
wich is best cltuch for NA?

Well, I must commend you on not starting a new topic. That said, your question is a bit off topic.

Truthfully the stock clutch is fine for stock power. Give the old search button a whirl, perhaps "Best clutch" or "stage 2 clutch". Its really personal opinion...

Brettus 10-23-2008 06:39 PM

cheapest ?
gut the cat
get cobb AP
hi flow air filter and racing beat duct - remove the screens from the stock intake

you are now good to go :)

byez 10-23-2008 10:16 PM

i noticed a screen within the intake as well, what is its purpose?

alz0rz 10-23-2008 10:29 PM


Originally Posted by byez (Post 2696935)
i noticed a screen within the intake as well, what is its purpose?

to correct air flow..

and to answer the main question, you can do 200whp quite easily.

first and foremost make sure your engine and its respective components are HEALTHY and within working spec. You'd be surprised how detrimental one coil or spark plug is to your power as well as mileage, etc. So check your spark plugs, ignition coils, wires, catalytic converter and air filter.

You can then easily bump up to 200 with a midpipe/hi-flow cat and a exhaust.. so long as your engine is healthy.

This car doesn't respond well to bolt ons in terms of price->power.. but small things do add up. Other things you may want to consider are a true cold air intake for high end gains and a reprogramming device such as the Cobb AP to correctly tune the factory tune to unlock any missing power.

Best bang for the buck in terms of power/price for this car is a midpipe with a Cobb Accessport.

StealthTL 10-23-2008 10:32 PM

First Rule Of Modification - (FROM)

- - - If you don't know an item's function, do not fuck with it. - - -

the screen is there to even out the turbulent flow (I know, it sounds counter-intuitive) Removal screws with the air flow meter readings, and disrupts the idle.

S

kersh4w 10-23-2008 11:00 PM


Originally Posted by Jedi54 (Post 2695374)
AP
high flow cat / midpipe
exhaust

and racing beat duct + any other intake.

Brettus 10-23-2008 11:06 PM


Originally Posted by StealthTL (Post 2696959)
Removal screws with the air flow meter readings, and disrupts the idle.

S

on some cars it does - not on mine . Been that way for a good 30,000 km's now and idle is sweet .

kersh4w 10-23-2008 11:28 PM

i ran with only one of the screens when i had my stock airbox. it ran just fine.

SiLVeRE8 10-24-2008 12:26 AM

test pipe, exhaust, racingbeat intake with duct, pulley, and that should get you to 200 or atleast close.

wassup_nuthin 10-24-2008 03:41 PM

buy a mustang?....

bsteimel 10-24-2008 06:00 PM

nobody has mention a lightweight flywheel. Dyno tests show that the mazdaspeed flywheel bump hp by 8. That's not a bad increase for our cars for 500 bucks

This is a great option to do, when you replace your clutch, usually you can have them put it on for no extra labor costs.

Fanman 10-24-2008 06:07 PM

The stock clutch is fine for up to about 275 crank hp. If it was me looking for 200 whp (assume you are around 180 whp stock). I would do the following :

1. Cobb Accessport
2. Racing Beat Ram Air Dust & REVi intake box
3. AP Pulley (not a lot of hp, but cheap & easy to install)
4. RP Super Cat
5. Racing Beat REV8 Cat back exhaust.

That will probably get you to 200 wp at the top end.

Lightened Flywheel is a good mod, but not really price effective, as install cost is really expensive.

Brettus 10-24-2008 06:42 PM


Originally Posted by Fanman (Post 2698239)
2. Racing Beat Ram Air Dust & REVi intake box
.

not a good idea to shove dust down your intake :lol:

IXC-RX8 10-24-2008 06:43 PM

fujita 4.77 is a good mod for N/A

newguy 10-24-2008 09:06 PM

Im just getting the cobb ap, cat or test pipe and k&n drop in and de-wall the intake box and call it a day. prob never get to a dyno though

kersh4w 10-27-2008 12:52 AM

get the turboxs exhaust, it comes with a test pipe.

chickenwafer 10-27-2008 01:20 AM


Originally Posted by Easy_E1 (Post 2695392)
We had a local guy do 205 WHP with open exhaust (straight pipe) and the Racing Beat intake. He's just a freak of nature.
The Cobb Accessport and CAI intake and Catless exhaust is your best bet. Toss in the BHR Yukon Coil upgrade and you should be good.

Thanks, Eric, you forgot about me!

I made just over 200-rwhp back when I was NA, with a cat. I also had a less than stellar intake at the time (Umnitza) so I think that was holding me back.

I would say, the easiest way, is:

-upgraded ignition (BHR coils)
-catless midpipe (I didn't have this but it helps) or the TurboXS complete exhaust system
-AccessPORT
-modified stock intake box, or AEM or Racing Beat intake with duct

A lightweight flywheel will help, as will the Agency Power crank pulley, but they won't yield anything special. A lightweight fly does do more than just horsepower, though.

Also, having a motor with strong compression is the best starting point. If you motor has lower-than-average or just average compression, you'll have a hard time breaking the 200-rwhp mark NA.

ZumnRx8 10-27-2008 01:29 AM

mf'er AP PULLEYS....hmmmm
i was deciding which ones out of all of them....
do the pulleys void warranty?

joepatterson 10-27-2008 02:21 AM

My opinion; Drop in some bigger injectors, get a Cobb Accessport, and have it dyno-tuned. I think you could crank out a good bit more power. More fuel + More Air = More Power. Anybody see why that wouldn't work? You might want to get a better intake and reduce the exhaust restriction with a high flow cat or a race pipe.

The injectors are not so expensive really. What I just did with mine, but it is turbocharged, is to drop in two 550cc RC injectors in the secondaries, and put the 380cc injectors into both primary ports. My injectors cost about $89 each. You'll need to pull the upper intake to swap them. Not such a big deal I think.

From the factory, on MT model, for each rotor there is one 290cc, and two 380cc injectors. By going with the config I'm talking about, it is about a 20% increase in fuel capacity.

swoope 10-27-2008 03:06 AM


Originally Posted by joepatterson (Post 2700966)
My opinion; Drop in some bigger injectors, get a Cobb Accessport, and have it dyno-tuned. I think you could crank out a good bit more power. More fuel + More Air = More Power. Anybody see why that wouldn't work? You might want to get a better intake and reduce the exhaust restriction with a high flow cat or a race pipe.

The injectors are not so expensive really. What I just did with mine, but it is turbocharged, is to drop in two 550cc RC injectors in the secondaries, and put the 380cc injectors into both primary ports. My injectors cost about $89 each. You'll need to pull the upper intake to swap them. Not such a big deal I think.

From the factory, on MT model, for each rotor there is one 290cc, and two 380cc injectors. By going with the config I'm talking about, it is about a 20% increase in fuel capacity.

bigger injectors will not change hp.. unless you add more air, and the stock injectors run out of cycle..

that is not going to happen na.

beers :beer:

ltgmaddog 10-27-2008 03:19 AM

stupid question if you go catless what do you do with the o2 sensors?

ltgmaddog 10-27-2008 11:36 AM

Haha wow love how whenever I ask a question in a thread it goes silent. yay...

ltgmaddog 10-27-2008 01:01 PM


Originally Posted by ltgmaddog (Post 2700991)
stupid question if you go catless what do you do with the o2 sensors?

Ok I thought about it, I guess you would place the o2 sensors into the new made piping but would the engine automatically make up for the extra outflow? Currently I believe I blew maybe both my o2 sensors due to leaded gas, wasn't my fault (my boss gave me free gas from the raceway). So if I delete the Cats what can I do to save $450+$120 on buying new sensors and maybe gaining more performance or tuning capabilities???? :sad:

I was reviewing the Cobb AccessPort will this allow manual incremental adjustments to the Air/fuel mixture, or can you only choose from the allotted flashes already pre-made?

Are there any other choices?

kersh4w 10-27-2008 02:01 PM

keep it in the cat so you dont have to put it back in if you ever have to swap the cat back in.

greg985 10-27-2008 02:43 PM


Originally Posted by ltgmaddog (Post 2701472)
Ok I thought about it, I guess you would place the o2 sensors into the new made piping but would the engine automatically make up for the extra outflow? Currently I believe I blew maybe both my o2 sensors due to leaded gas, wasn't my fault (my boss gave me free gas from the raceway). So if I delete the Cats what can I do to save $450+$120 on buying new sensors and maybe gaining more performance or tuning capabilities???? :sad:

I was reviewing the Cobb AccessPort will this allow manual incremental adjustments to the Air/fuel mixture, or can you only choose from the allotted flashes already pre-made?

Are there any other choices?

you could get a f'in sweet Ebay chip

alz0rz 10-27-2008 04:50 PM


Originally Posted by greg985 (Post 2701643)
you could get a f'in sweet Ebay chip

I like this one:

http://cgi.ebay.com/ebaymotors/25HP-...mZ110303136051

Fully adjustable, serious stuff.

shaunv74 10-27-2008 04:54 PM


Originally Posted by IXC-RX8 (Post 2698268)
fujita 4.77 is a good mod for N/A

Changes torque to the wheels and will improve acceleration but does not change hp.

OP there is already a ton of info. that answers this question out there...

http://i164.photobucket.com/albums/u...earchfirst.gif

Ranx0R0X 10-27-2008 08:23 PM

Intake...
 
It seems like there's a wide variety of opinions on the benefit of CAI, exhaust and mid-pipe. These range from being seen as beneficial upgrades to being bling.

The MM Cobb AccessPort seems so widely advocated for hp boost that I have one on the way. If nothing else it gives an inexpensive way to check and modify the tune of the engine.

Right now I'd say the CAI and exhaust are lower on my list.

ltgmaddog 10-29-2008 04:57 AM


Originally Posted by alz0rz (Post 2701815)
I like this one:

http://cgi.ebay.com/ebaymotors/25HP-...mZ110303136051

Fully adjustable, serious stuff.

ahhh interesting thanks.

tsxmidship 10-29-2008 12:56 PM


Originally Posted by Ranx0R0X (Post 2702175)
It seems like there's a wide variety of opinions on the benefit of CAI, exhaust and mid-pipe. These range from being seen as beneficial upgrades to being bling.

The MM Cobb AccessPort seems so widely advocated for hp boost that I have one on the way. If nothing else it gives an inexpensive way to check and modify the tune of the engine.

Right now I'd say the CAI and exhaust are lower on my list.

midpipe and exhaust will reduce the backpressure, given that they are well designed

nycgps 10-29-2008 01:04 PM

Its Easy

Sell the car

buy another car hmm .. maybe a 350z ?

BAM ! isnt that easy ?

nycgps 10-29-2008 01:08 PM


Originally Posted by alz0rz (Post 2701815)
I like this one:

http://cgi.ebay.com/ebaymotors/25HP-...mZ110303136051

Fully adjustable, serious stuff.

MUAHHAHAHAHAHAHAHAHAHAHAHAHAHAAAAA ! LOL ! LMAO ! ROFL !!!!!!

WOW ... I mean WOW !

THAT DUDE ACTUALLY SPENT DA TIME TO MAKE THAT EBAY LISTING ... HOLY CRAP !

THATS SOME SERIOUS SHITZ y0 !!!

Jedi54 10-29-2008 01:11 PM

omg, that Dyno-Boost chips is EPIC! :banghead:

RedefineRX8 10-29-2008 01:12 PM

yes... amazing quality... funny thing is I know someone around here that ordered one for his corolla S. Haven't heard from him since he "installed" it. hahahahaha

Mr.&Mrs.Magic 10-29-2008 01:29 PM


Originally Posted by alz0rz (Post 2701815)
I like this one:

http://cgi.ebay.com/ebaymotors/25HP-...mZ110303136051

Fully adjustable, serious stuff.

thats freakin awsome!! With this I can make my car run even richer. More fuel must be a good thing.:eyetwitch Now if I can just save enough money and get that tubronator for $34.95 I'll finally be boosted.

RedefineRX8 10-29-2008 02:47 PM

pshhhh. you better save up more than 34.95. You know you can stack turbonators too right?!?!? there's no limit to the power you can have!!!!!!!!!!!!

simplyphp 10-29-2008 02:52 PM


Originally Posted by RedefineRX8 (Post 2704895)
pshhhh. you better save up more than 34.95. You know you can stack turbonators too right?!?!? there's no limit to the power you can have!!!!!!!!!!!!

I ALREADY POSTED THIS TOPIC. 600hp/tq with beer tits & electricsuperchargednawz.

byez 10-29-2008 03:03 PM

That adjustable +25 hp device looks amazing, I wonder if it would be compatible with my HHO Hydrogen Fuel Cell kit that I also got off ebay.

tajabaho1 10-29-2008 03:58 PM

get an access port, and catless midpipe, 12.7 AFR

should get there, or drop in a bridgeport :D

Mr.&Mrs.Magic 10-29-2008 04:00 PM

NO more worries guys I'm working on a top secret power adder coming to ebay. I'll go ahead and give you a little insight as to what your looking for. It's called the hydronawzsupergogeterdonethingy. I know I know something with that many vowels has to give 50+ whp but even better than that it gives up the biggest boom/bang for the buck you've ever seen. Basically I'm going to atomize the nawz before it gets into to combustion chamber therfore giving you and extra power stroke. I promise the biggest boom you'll ever get out of your motor.

joepatterson 10-30-2008 01:02 AM


Originally Posted by swoope (Post 2700982)
bigger injectors will not change hp.. unless you add more air, and the stock injectors run out of cycle..

that is not going to happen na.

beers :beer:

Well, I guess I'm still thinking of the good ol' days when I had my 69 Z-28 and dropping a bigger carb on it and tuning it up would get some more power. On the other hand, the compression ratio was really high on it.

Good effort I guess. :dunno:

swoope 10-30-2008 02:20 AM


Originally Posted by joepatterson (Post 2705890)
Well, I guess I'm still thinking of the good ol' days when I had my 69 Z-28 and dropping a bigger carb on it and tuning it up would get some more power. On the other hand, the compression ratio was really high on it.

Good effort I guess. :dunno:

ok,

you did not drop some big injector into a z28..... btw, i would bet the rx8 comp ratio is about the same as the 69 small block chevy..

carb does not = injector. and the 60s cars did not have an ecu. much less a ecu as knowledgeable as ours..

btw,, i cant tell you how many sb chevys i have built..

details are important... hey, but what do i know..


beers :beers:


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