olddragger

iTrader: (3)

this kit is a Pettit S.c. shop is based in florida
OD

avanti_racing08

What is "FI" rember im new to rotory but if i had to guess fuel injected but it could be something diff.

Falken

rotary.

FI is forced induction, meaning forcibly shoving more air into the engine, burning more fuel, and increasing power.

avanti_racing08

thank you

Bastage

iTrader: (1)

This is a good thread to read if you're interested in forced induction:

https://www.rx8club.com/series-i-major-horsepower-upgrades-93/power-adders-fi-dummies-turbo-supercharger-nitrous-122645/

avanti_racing08

ya i will be in the future. I have loved the way SC have been better than turbos. my first nod will be full exausht and intake. and then im kinda at a loss for what to do next really. Im only looking to run about 350 RWHP. all i will be doing is cross country rallys. so i fig w/ header back exausht and the SC with a few other monds i should be good and then worry about locking it to the ground

MazdaManiac

iTrader: (3)

Drugs are bad.

morkusyambo

We'll let you know when someone can do that reliably with a twin-screw kit.

avanti_racing08

Really? why is that.

MazdaManiac

iTrader: (3)

If you must ask, you aren't ready for the answer.
Any idea of how much air it takes to make 350 RWHP?
Got a flow map for the SC handy?

mysql

Jeff's answer was nonsense. I have the true answer:

It's because no one can be told what the Matrix is.

Charles R. Hill

iTrader: (7)

So, between the turbo option and the supercharger option which one is the red pill and which one is the blue pill?

MazdaManiac

iTrader: (3)

Now you are getting all Lewis Carroll on me.

Down the rabbit hole we go...

avanti_racing08

so who has the highest amount of WHP on here then if 350 is not reasonable

paulmasoner

iTrader: (1)

350 is PERFECTLY reasonable... with the proper turbo kit.

AFAIK there is no SC kit for this car that produces 350WHP

california style

350 WHP requires significant extra upgrading of the engine, ie fuel system and ignition sytem and fuel injectors) to be viable with any forced induction kit, as it goes beyond the OEM cars limits....

Therefore any kit aiming for these numbers must address all these extra issues as well....

paulmasoner

iTrader: (1)

ah, touche... fixed...

Bastage

iTrader: (1)

~307 rwhp has been done with this kit, but if I were you I would read everything in that link posted above, and a bunch of other threads in that same forum before I even think about forced induction. It can get pretty expensive very quickly if you or someone who installs/tuned it does something wrong, so you better know what you're dealing with when you make your decision.

marsredr100

iTrader: (1)

Ahh!

And the SC hater squad strikes again. May I recommend some anger management therapy. I, on the other hand tried it but to no avail, therefore I decided to work with explosives for a living thus allowing me to concentrate more in not becoming a cloud of pink mist rather than vent my frustrations in the Pettit Super Charger Owner’s thread.

Anyway, as a Mazda Rotary enthusiast (previous owner of an RX4, GSLSE RX7, GTU RX7 and current owner of a 13B Bridge Ported all motor 11.96 seconds quarter mile R100 and SC RX8) I can give a rats *** about what direction you might want to go (SC, Turbo, Nitrous) in order to enhance the power of your NA (Normally Aspirated) RX8 engine. The SC option will not (as of today) allow you to achieve your 350 whp goal but on the other hand will provide a reliable and smooth acceleration hence my decision to go with the SC kit.

However, if you would like to go with the Turbo option then I’ll recommend doing some serious internal engine modifications like (race spec bearings, stationary gears, housings lapping, rotor side clearance, engine balancing, etc.) and the usual external engine modifications (fuel pump, fuel injectors, upgrade ignition, etc.) before trying to achieve your 350 whp goal since the Renesis engine was not designed to handle that much HP. Also, don’t forget to upgrade your suspension and brake components since it will be needed in order to handle the additional HP.

With the SC kit you will not have to do all of the above since the stock engine is capable to handle the additional 60-100 additional HP provided by the kit and not to mention the get in start your car and go.

As an example last Saturday I found out that there was a dyno day at a local shop in Tampa. Got in my car drove 45 minutes to the location, put the car on the dyno, made three passes in a row (the second with the meth kit off), dyno’s A/F air fuel gauge was not operational (no problem), achieved 98 more whp than the best NA RX8 that dynode the same day, no detonation, no mysterious oil leaks, the guy that sat on the car while on the dyno was amazed with the smooth yet strong acceleration, the owner of the shop begged me to take the car for a spin (which I let him do afterward), got back on the car, did a 135 mph pass on I-4, got home, parked the car and enjoyed the rest of the day.

From the Pettit Racing website:

Highlights:

- 60-100 additional horsepower and torque with only 5-8 psi boost
- Superb drivability and overall performance
- Reliable and easy to maintain
- D.I.Y. installation, with easy to follow instructions
- Only the highest quality components

The Stage II CS Kit can produce 300 whp and 195 lb/ft torque @ 5-7psi. Most of the added hp is a result of recalibrating the factory PCM. Other benefits include: Superb drivability, and clean smooth rock solid acceleration through the entire RPM range. Also with the stock PCM and OBD II diagnostics system fully functional there is no ck engine light unless something is wrong. Most OBD II compatible scan tools can perform full system scans and clear codes and the Mazda dealer can still perform full service with the kit installed as well. Our latest testing on 5 different RX8’s has consistently yielded 278 - 300 whp through the stock exhaust with the latter using a hi flow cat. We will continue testing other combinations; like the stock cat with performance cat back system etc, etc.

Take a look at the dyno sheet below (note that the engine was reved up to only 8,000 rpm per the dyno owner mandate) but it is capable to achieve 9,000 rpm easily since I have a very conservative PCM flash. Basically as stated by Pettit, an additional 60-100 whp, @ 195 lb/ft torque. All that with the stock fuel pump and fuel injectors.

My best advice is read, learn, decide which route you want to go and never ever put a piston engine on a Mazda Rotary car.

Mazurfer

Think the warranty(except for drivetrain) is over in December(I think).....need to check on this and will this week.
Foot sucks! Next date is June 3rd to see if I graduate to a walking cast. Drove down to Vero this weekend via A1A and wasn't too terribly bad, but still have Auto rental.

mysql

The problem is poorly engineered hardware. Stuff like generating boost at idle, requiring an induced vacuum leak to fix are hacks that shouldn't exist to begin with. By your same logic, the people who are "SC haters" are also turbo haters because they applied the same criticisms towards kits like the GReddy. The end result is that we have a trial by fire with customer cars till the bugs are worked out. In the end we might have workable solutions, but things could have been done correctly from the start. Hymee's SC has a clutch on the SC btw.


Compressed air is compressed air. I still want to hear why people keep throwing around words like "reliable" in regards to superchargers. Does the SC soften the air before entering the engine, causing rounded air molecules which don't wear out engine internals as much?


You make it sound like the turbo is a completely different animal. It's the same car, regardless of FI choice. If you approach the 300 whp range, you should upgrade the fuel injectors, since you're close to maxing them out at that point. 330 whp is the point where the ignition system needs to be upgraded. Above that, we know stock engines are running OK on 350 whp. How long they last, we won't know.


If that comment was directed to me, I can guarantee that without changing your SC or fuel management in any way, I can induce detonation in your engine using commonly sold performance upgrades for the RX-8, and installing it exactly as the instructions detail. All this shows is that being the first to try out a performance product is never the best idea if you value your engine's longevity.


My advice is to not claim bashing on one side, then do it to the other. We're all RX-8 owners with the same goal. I don't speak well of the GReddy kit either, and I don't see the greddy kit owners taking it personally. I even own that kit! (or at least, parts of it now).


BTW, if you have any plans to get an accessport, you might want to look into our dyno meet in Tampa for the 14th of next month. We need a few more people.

marsredr100

iTrader: (1)

Yes, that comment was directed to you.

Hope you have fun fixing your car while I enjoy my reliable SC RX8. Or you can always donate it to your local charity car donation agency. http://www.kars4kids.org/car-donation-tampa.htm

mysql

Are you claiming no Pettit SC vehicle has had their engine blow? Maybe we should start talking about those instead of ignoring it. Hell, even stock engines blow up. And in far greater numbers than FI simply due to there being more of them. You're being disingenuous to claim reliability.

Like I said, come over to my house, we'll install one performance upgrade in your car that is not FI related, and I'll watch as your engine blows up. BTW, my engine still runs normally. I still make more power than you, and I've been FI longer than you too. I'm not even saying this to brag. It's just to illustrate that your argument is false. If you want to get down to it, it's $400 for a brand new front iron and my oil leak stops. But of course we both know my problem wasn't turbo related despite what you're trying to imply. I don't want to make this into a flame fest, maybe you misread my post. Try reading it again: https://www.rx8club.com/showpost.php...postcount=2173 Nothing in there was an attack on you, even though you're reacting to it as if it were.

Regardless, you're being hypocritical, and you haven't addressed anything I said. Just throwing out a snide comment that isn't based in reality isn't doing anything for you. If you want to discuss, I can do that, otherwise I'm not going to bother responding to comments like this.

morkusyambo

Avanti, as you can see from reading the last several posts you're hardly ever going to get unbiased advice from an internet forum.

If you want a twin-screw you should contact Cam or Hymee to inquire about their respective kits.

For a turbo I would contact MM or Scott at Mazsport.

If you dont' feel like shipping or driving your car, I would start looking for a shop that you're comfortable with locally.

morkusyambo

^^+1^^