I haven't received my rx8 yet but from its stat it's clear to me this car is not gonna be as fast as my S2000 nor like other cars i've had before. I have decided to go w/ either a after market turbo or supercharger. At least that will push for extra 100hp.....I hope~! Are there any owners considering after market turbo for this car?
If so what are you guys considering!
S2000 was very easy to hook up, since comptech makes supercharger specially for S2k.....
need some help here, thanks.

The car is barely out in Japan and there likely won't be a super/turbo charger for some time, if at all. The engine compartment is MUCH tighter than any car you're used to have known.

Yeah, I've read there's no room for any kind of turbo.

There have been many cars with tight engine compartments that can hold a turbo. Take an RSX for example or a new Celica. Their headers collect in the back of the engine which makes even less space for one. Tuners are still able to make equal length manifolds to hold a fairly large turbo.

When a turbo system is made, and it will be done by more than one company, expect to see the front half of the engine compartment to be cleared of the intake boxes, and used effectively for turbo components.

Actually what I was getting at is the engine is so far back and low... I don't see an easy or cheap application of any forced induction.

It's not to say it won't happen... but likely for the price you're better off just waiting for the RX-7 or MPS RX-8.

Originally posted by Hercules
Actually what I was getting at is the engine is so far back and low... I don't see an easy or cheap application of any forced induction.

It's not to say it won't happen... but likely for the price you're better off just waiting for the RX-7 or MPS RX-8.

Oh, it'll certainly happen Herc. Mazda has said themselves on a number of occasions that the car was built with the intention of allowing people who want to add boost to add boost. I would guess that a turbo/supercharger would be out by next summer. Now, whether Mazdaspeed will come out with one that will not void your warranty is yet to be seen. I, personally, will not be adding any boost until my warranty expires unless Mazdaspeed comes out with something before then.

Regardless, there are a number of boost threads in the Aftermarket Performance forum. One of them is here:
http://www.rx8forum.com/showthread.php?s=&threadid=3707 :p

SUPERCHARGER ALL THE WAY... SCRATCH THE TC! :cool:

There is plenty of room in the engine bay. A huge percentage of the engine bay is gigantic airboxes and elongated tuned intake piping. That stuff will be gone more than likely with a turbo set-up (in-lieu of a cold air intake of some type) and an eaton-style supercharger is so small it can go about anywhere.

If they can fit turbos and superchargers in a 350Z then they can definately due it for an RX-8.

-Mr. Wigggles

Originally posted by Hercules
The car is barely out in Japan and there likely won't be a super/turbo charger for some time, if at all. The engine compartment is MUCH tighter than any car you're used to have known.

BI-STATE, a newish company offering upgraded turbos, and suspension parts for the FD is planning on having a turbo kit on the market for the 8 by the spring.

Well don't matter to me... I'm not interested in turbos. And the lead rotary engineer doesn't want to use them either, convinced he can get the power from using wider rotors.

I'm happy with that.

Originally posted by Hercules
Well don't matter to me... I'm not interested in turbos. And the lead rotary engineer doesn't want to use them either, convinced he can get the power from using wider rotors.

I'm happy with that.

I'd rather go with wider rotors too, but from a practicality standpoint, I'm never going to be a world class race driver, I just want a little more speed for some fun. The multiple thousands of dollars that it would cost to build a Renesis with wider rotors doesn't make sense compared to a couple grand for a turbo kit.

Originally posted by RotorMotor


I'd rather go with wider rotors too, but from a practicality standpoint, I'm never going to be a world class race driver, I just want a little more speed for some fun. The multiple thousands of dollars that it would cost to build a Renesis with wider rotors doesn't make sense compared to a couple grand for a turbo kit.
What are you talkin about?? Multiple thousands of dollars?

The new RENESIS should be in the MPS RX-8 and RX-7, and the increased horsepower as well.. it's just a matter of waiting for it. Not like I meant for you to build it yourself :p

Originally posted by Hercules

What are you talkin about?? Multiple thousands of dollars?

The new RENESIS should be in the MPS RX-8 and RX-7, and the increased horsepower as well.. it's just a matter of waiting for it. Not like I meant for you to build it yourself :p

I've always liked wider rotors too :) I'd love to see a 2 rotor 20B myself.

Originally posted by Hercules

What are you talkin about?? Multiple thousands of dollars?

The new RENESIS should be in the MPS RX-8 and RX-7, and the increased horsepower as well.. it's just a matter of waiting for it. Not like I meant for you to build it yourself :p

HOLY CRAP! How much will power do you think I have? I can't wait that long!!!! :p

Originally posted by daedelgt


I've always liked wider rotors too :) I'd love to see a 2 rotor 20B myself.

Otherwise known as the 13b!

I'm assuming he meant a 2 litre displacement from a 2 rotor rotary.

not the current 20b with one less rotor.

;)

I am pretty sure Mazdaspeed is producing a turbo charger system as we speak. I do have inside information, however I wont leak anymore ;)

so the bottom line.....we need to wait and see which aftermarket company can come up w/ a fantastic solution for all of us, in the meanwhile i'll just cruise my no power rx8 (but pretty), and on my fun driving day, my supercharged S2k will do the job........enjoy your 8s guys!! I will too!

(rx8 0-60 6.3 in Automotive magazine, 0-60 5.9sec in Car and Driver, I can hardly imagine any normal driver can reach 5.9 , if I think this car's slow why did i buy it? ROTARY Engine, and its uniqueness just like S2k's unique quality)

Originally posted by jonah428
so the bottom line.....we need to wait and see which aftermarket company can come up w/ a fantastic solution for all of us, in the meanwhile i'll just cruise my no power rx8 (but pretty), and on my fun driving day, my supercharged S2k will do the job........enjoy your 8s guys!! I will too!

(rx8 0-60 6.3 in Automotive magazine, 0-60 5.9sec in Car and Driver, I can hardly imagine any normal driver can reach 5.9 , if I think this car's slow why did i buy it? ROTARY Engine, and its uniqueness just like S2k's unique quality)

no power rx8? maybe if u had a honda... oh wait you do, the s2000 is an exception to the rule, however I believe the s2000 and rx8 are fairly comparable in "power" values

I guess you haven't read what I've posted here..... ^^
it's ok, my blue 6speed fully loaded RX8 cannot even come close to my 2yr old yellow comptech supercharged S2000 w/ Mugen intake and exhaust.... Like i've posted a career racing driver can reach 60 in 6.3sec w/ rx8 and I (don't know nothing much about racing drive nor road test shxt ) can still reach 60 in 5.2 or 5.3 w/ my S2k......so when i say no power I mean it's slower than my hooked up S2k and I truly I say it again I truly wanna make my 8 faster than my S2k, that's why I'm asking people here if there're any solution for turbo/super charger.
Good Luck to all of us, and God bless all.....
hey thanks alot guys for some of you info so far....i'll keep looking too~

I JUST HATE IT WHEN A HOOKED UP CIVIC PULLS OVER NEXT TO ME AND GIVES ME THAT LOOK! I CAN BEAT YOUR ASS

Originally posted by jonah428
I guess you haven't read what I've posted here..... ^^
it's ok, my blue 6speed fully loaded RX8 cannot even come close to my 2yr old yellow comptech supercharged S2000 w/ Mugen intake and exhaust.... Like i've posted a career racing driver can reach 60 in 6.3sec w/ rx8 and I (don't know nothing much about racing drive nor road test shxt ) can still reach 60 in 5.2 or 5.3 w/ my S2k......so when i say no power I mean it's slower than my hooked up S2k and I truly I say it again I truly wanna make my 8 faster than my S2k, that's why I'm asking people here if there're any solution for turbo/super charger.
Good Luck to all of us, and God bless all.....
hey thanks alot guys for some of you info so far....i'll keep looking too~

I guess you haven't read that the auxillary ports were stuck on some of the preproduction cars. 0-60 was tested as 5.9s by various mags and that should be what the production models do.

-Mr. Wigggles

What mods can you do to increase the rev limit, etc... if you wanted to keep the RENESIS naturally aspriated? I mean, look at the 787B, it made a ton of power and was N/A. Granted it had twice the # of rotors, but there must be some mods you can do and stay N/A while boosting the hp.

chris

Originally posted by fengshui
What mods can you do to increase the rev limit, etc... if you wanted to keep the RENESIS naturally aspriated? I mean, look at the 787B, it made a ton of power and was N/A. Granted it had twice the # of rotors, but there must be some mods you can do and stay N/A while boosting the hp.

chris Porting is the way to get more power... but also the way to fail inspection.

Agressive porting, and dowels allowing the engine to freely rotate at 10k+ and a standalone or piggyback ecu to raise the limiter and lean out the fuel mixture. Balancing the engine components would probably help too.

You can also remove all emmissions crap, 3" the exhaust the whole way back, remove the cat, install a nice intake, replace the intake piping with higher flowing metal components.

Originally posted by daedelgt
You can also remove all emmissions crap, 3" the exhaust the whole way back, remove the cat, install a nice intake, replace the intake piping with higher flowing metal components.

not if you want to drive you car in california, or any state for that matter. It is illegal to remove anything off the emmisions control systems w/o replacing it with a part that has equal or greater EPA restrictions. Here in FL there are no more emmisions control stations/officers but if a cop looks under the car and doesn't see any cats then you are in trouble.

I think I'm getting deja vu, but I do remember seeing this nifty SC setup on a 350Z a few months back. Due to lack of space under the hood, rather the usual mounting technique, they linked the SC to the crank via a driveshaft, and relocated the SC somewhere else. Pretty clever, though I've been told it is not completely unique.

Edit: So, I guess my point is - you can DO anything you want, go as fast as you want; question is: how much you wanna $pend??

Originally posted by Farsyde


not if you want to drive you car in california, or any state for that matter. It is illegal to remove anything off the emmisions control systems w/o replacing it with a part that has equal or greater EPA restrictions. Here in FL there are no more emmisions control stations/officers but if a cop looks under the car and doesn't see any cats then you are in trouble.

Sometimes I forget other states aren't as adventageous as hick-town Louisiana.

Originally posted by B-Nez
I think I'm getting deja vu, but I do remember seeing this nifty SC setup on a 350Z a few months back. Due to lack of space under the hood, rather the usual mounting technique, they linked the SC to the crack via a driveshaft, and relocated the SC somewhere else. Pretty clever, though I've been told it is not completely unique.

Edit: So, I guess my point is - you can DO anything you want, go as fast as you want; question is: how much you wanna $pend??

i actually saw this type of setup on an NSX. I beleive it was the Denso NSX at NOPI. They relocated the SC to the other side of the engine. If they can get a SC on an S2000, or manage to get a twin turbo setup on the Greddy project 350Z, then puttin a single turbo in the 8 shouldn't be a problem

In time kits will definitely be produced for the 8.Only time will tell how the renesis responds to forced induction. There are definitely a lot of things to consider with this altered beast (10 to 1 compression,port timing and location,reduced apex seal dimensions) Note that these issues, and more, are apart from the more obvious problems noted (Space etc.)
I'm still quite interested in REAL credible sources indicating that Mazda is considering wider rotors;it's funny how rumors get started.Trust me when I say that there is much more involved with this change than than 98% reading this understand. I'm sure I'll touch this topic again in the future, and if I'm wrong I will very quickly and humbly admit it.
Lastly I will pay daedelgt if he can get 10hp increase from the mods he's recommending (vs probably losing much more than that.) As Racing Beat can probably attest (based upon rumors again) or Darryl Drummond (who does the formula Mazda motors, including the Renesis stuff for next years pro series) increasing the output on this unit gets interesting.
Have fun, knock yourselves out.

If you're going to be racing with it, buy a turbo or supercharger. If you're not, save your money and buy a high-definition TV, or a new computer.

Originally posted by MadMax Rotor4
If you're going to be racing with it, buy a turbo or supercharger. If you're not, save your money and buy a high-definition TV, or a new computer.
LOL! That is actually a pretty good point, but is also rather humorous. :D :D

Originally posted by MadMax Rotor4
If you're going to be racing with it, buy a turbo or supercharger. If you're not, save your money and buy a high-definition TV, or a new computer.

alright got those, so I guess I am forced to buy a TURBO! TURBO BABY YA!!!

Bi-State's turbo kit will be done well before the spring. In fact, we're looking at more like mid-August when it will be done. And then available to sell by early Sept.

It will be a low-boost kit, based on a dual ball bearing turbo like the Garrett GT30. Low enough boost that it won't use an intercooler, and will use only the stock fuel system. I will PERSONALLY tune it with full datalogging and a wide-band lambda meter. The kit will be sold with a wastegate spring to keep it at safe boost levels.

Then next Spring (or so) there will be another version of the kit that will have an intercooler. Right now there aren't any provisions available for fuel system manipulation, hopefully by Spring there will be. Let's hope that Mazda took the Toyota engineer approach with the 8 and over-engineered the fuel system. I'd hate to do all this work on a turbo kit and have it be limited to 3psi because of a barely adequate fuel system.

Also, look for the entire bolt on kit to be very inexpensive.

Originally posted by BOOSTD 7
Bi-State's turbo kit will be done well before the spring. In fact, we're looking at more like mid-August when it will be done. And then available to sell by early Sept.
....................................
Also, look for the entire bolt on kit to be very inexpensive.

Thanks for your info, if they can come up w/ bolt on kit it'll be an awesome one to get. That's what i did w/ my s2k I ain't no mechanic, just followed through comptech's instruction and took me about 8-9 hrs to put it all (supercharger,intake exhaust etc), but hey it was all worth it + had so much fun doing myself + gained little over 100hps

can't wait to get hands on my Rotary....woo.......it will be fun. :D

Originally posted by MadMax Rotor4
If you're going to be racing with it, buy a turbo or supercharger. If you're not, save your money and buy a high-definition TV, or a new computer.

actually you can just get much fater WRX STi or w/ the money for buying HDTV , computer and your rx8, you can go for corvette too.........IT IS NOT ABOUT RACING!!!

Originally posted by BOOSTD 7
Bi-State's turbo kit will be done well before the spring. In fact, we're looking at more like mid-August when it will be done. And then available to sell by early Sept.

It will be a low-boost kit, based on a dual ball bearing turbo like the Garrett GT30. Low enough boost that it won't use an intercooler, and will use only the stock fuel system. I will PERSONALLY tune it with full datalogging and a wide-band lambda meter. The kit will be sold with a wastegate spring to keep it at safe boost levels.

Then next Spring (or so) there will be another version of the kit that will have an intercooler. Right now there aren't any provisions available for fuel system manipulation, hopefully by Spring there will be. Let's hope that Mazda took the Toyota engineer approach with the 8 and over-engineered the fuel system. I'd hate to do all this work on a turbo kit and have it be limited to 3psi because of a barely adequate fuel system.

Also, look for the entire bolt on kit to be very inexpensive.


Anyone have a link to Bi-State?

Originally posted by Efini 8


no power rx8? maybe if u had a honda... oh wait you do, the s2000 is an exception to the rule, however I believe the s2000 and rx8 are fairly comparable in "power" values

it's plastered all over everywhere that the 8 stacks up very well against the S2000, all things considered.

Originally posted by jonah428


actually you can just get much fater WRX STi or w/ the money for buying HDTV , computer and your rx8, you can go for corvette too.........IT IS NOT ABOUT RACING!!!

I understand what you're feeling and you're absolutely correct. It's just that cap's lock problem at the end there that's got me puzzled.

The peron who you have replied to is simply stating this...

To a good many people who have decided to buy an 8, breakneck speed out of the block, or whatever, is not all that necessary, as you have stated yourself. The car ain't all that bad at that and it has much more than that.

Is there another reason to turbocharge other than to go fastER? You chose not to call it racing, but the persuit of fastERness IS racing, whether against an other person, or yourself. No?

I'll pay off my stock RX-8 and get a stock RX-7 when it comes out. Then I'll have two rotarys in the garage--the family grocery car--and the "honey where am I supposed to put my purse?" car :p

I am curious about what kind of performance Mazda will put into a new generation RX-7. Will they go with three rotors or turbo? I say go with three rotors. That ought to please the torque obsessed among us. Whatever they do, a new RX-7 should be a hoot given the Sports status of the four door family version RX-8 :p It is so easy to lose sight of the fairly wide market the RX-8 was designed to please. Witness the diversity of thoughts here in this forum.

I keep saying a three rotor would be nice as an RX-7 powerplant,
but so have a lot of serious rotorfans for many years.For now we can patronise (and enjoy ) with the RX-8 and pray whatever decision is made is to our liking.:)

I'd rather Mazda save the weight of the housings and associated plumbing and sticking with the two rotor for the RX-7 and increasing rotor width for a bit more juice, and lowering weight more to get added performance and superior handling.

I wonder how much weight they can take out and still meet all of safety requirements. I don't know how much horsepower they can pull out with the engine mod but heck if it works great. That would probably not lower the fuel consumption as much as a third rotor but can you imagine well over 350 horsepower on a stock car weighing 3-400 pounds less than the 8?

I have to agree with jonah on this one. Honestly I don't care if the RX8 is a rotary or not (I am sure I will get crucified for that), I became interested in the car because of its appearance and the innovative doors, etc.

Honestly based purely on numbers (I know they don't tell a true driving experience but since I haven't driven it I only have numbers to go on) I would have preferred them to do a torquey six or turbo four tuned in the lower RPM range. I grew up in American muscle and like torque. I like not having to beat the crap out of the car to get the feeling of speed and such.

I owned a 2001 Audi S4 and that car was amazing it combined all the elements of the perfect sport sedan. It wasn't quite as stylish as I liked but still was very impressive. If after driving my pre-ordered Rx8 I don't like the lack of torque, etc I will probably go back to the S4.

I hope the numbers are misleading on the Rx8 as I truly love the style.

Herc,
Again I'm really intrigued with the suggestion that Mazda is planning on widening rotor & housings. I think this is even greater fantasy than the renesis 3rotor I dream of. They seem very satisfied with the dimensions and geometry currently in use.
The easiest thing to do is use the 13B renesis and do their best with weight control. If I had to put money on it this would be my bet. A real shame since it would be nice to put a proper spanking on the competition.
Back in dreamland for a moment, the 20B version would easily equal the Z car's horsepower even with restricted ports. Torque would casually be in the 250 range, in a car with less weight.
Back to reality!

I'd never ever run a turbo setup without an intercooler, especially on a car w/ 10:1 compression. I also wouldn't pay thousands of dollars for a 3psi turbo system. It wouldn't be worth the money or the amount it would cost to install it (turbos are the most complicated of the FI sysytems).

I'd be interested to see what kind of turbo/supercharger setups come out. On a car with all high rpm power and little low end torque, I'm wondering how useful a turbo or centrifugal blower would really be. They'd certainly help some in the midrange and top end, but where the car needs help is down low. Mustang 5.0 V8s were great for centrifugal blowers because they had good low end power stock and usually ran out of steam over 5000 RPM, and the blower was perfect for them. On an RX-8 it would start slow but then take off like a motherf*cker when the boost hit. It'd make for an interesting (and probably scary) drive. The only way around that would be to use a Roots/Eaton type supercharger, which would be huge for low end but sacrifice some of the top end power and isn't usually used in street cars for high RPM applications. The flat, broad powerband would be great though.

Anyway, we'll have to see what Mazda and the rest of the tuners have in store. Should be good times ahead though for those out there with the money and balls to do forced induction.

Originally posted by Racer X-8


I understand what you're feeling and you're absolutely correct. It's just that cap's lock problem at the end there that's got me puzzled.

The peron who you have replied to is simply stating this...

To a good many people who have decided to buy an 8, breakneck speed out of the block, or whatever, is not all that necessary, as you have stated yourself. The car ain't all that bad at that and it has much more than that.

Is there another reason to turbocharge other than to go fastER? You chose not to call it racing, but the persuit of fastERness IS racing, whether against an other person, or yourself. No?

yes , yes, and yes...I see your point too. 8 is not that bad as it is in stock. If I was still in college and drive 8 to school daily or for fun weekend car, I would be more than happy to live w/ this car. But if you have to drive to work everyday 100 miles per, then that's an another story. You'll wanna enjoy driving~ otherwise that whole 100 mile trip (daily) will be a hell. Since I like 8($33K) better than corvette($40K), i'm willing to pay that 7gran difference to make this car to corvette's performance. why are people dying to buy Ferrari or Lambo? for racing? nah~ it's their desire for need of something others don't have. I hardly doubt that many owners of Ferrari in NY City area buy their car to race.
Even if i don't use all the power that is given, it's always good to know that I have it when i need to , having a decision from CHOICE to CAN'T make a whole difference in life. I most likely will never race to work but i'll always have that choice not b/c I can't since the car doesn't deliver . It is that desire of wanting more that makes us who we are!

so having said that you don't need turbocharge your 8 if you feel you have enough power but I choose to do so knowing that when i see another 8 on freeway my car is better than theirs + I can push it to full throttle once in a while then my adrenaline will go WOW~ YES, YES, and YES~~~
:)
enjoy your 8