310 WHP and 252 WTQ Interceptor X + Greddy Turbo HOLY S@%*
 

Thought I'd share my results from tonight with my fellow RX8 owners... :rock:

My current setup consists of the Interceptor X EMS, Greddy Turbo, External Tial 46 Wastegate, Unorthodox Pulleys, 3 inch catless midpipe, Fujitsubo exhaust, PWR radiator and Innovative wideband 02 (XD1).

I was previousy running the emanage with my setup with a few of the fixes from the local board gurus like the wastegate signal to the turbo outlet. (Mazdamanaic, Mad Dog..Thanks guys). I had the car tuned last August with decent results but still had tons of driveability issues. Very choppy transition into boost, occasional lean spot in my AFR when going into boost, car would stall sometimes, serious backfire that sounded like gunshots, a funny spot around 4000 rpm that when in boost would cause the car to buck tremendously until 6000rpm and a WEALTH of other problems that made me want to give up this car..and focus on working on my fiancee's WRX instead. Plain and simple engine management was a big issue.
:mad:

I read great reviews on the Interceptor and decided to give it a shot... I even had Scott fly in frisom Florida to Toronto (CANADA) to come and install the unit and tune the car. All I can say WOW!!!! Every driveability issue I had with the car before is gone. No more backfire, no more stalling, no more choppy transition into boost and a rock solid 11.5-11.8 AFR. The car feels as smooth as N/A but with power I never knew could be there. I'm still in disbelief. I am STILL GRINNING ear to ear after my drive home. :mdrmed:

We ended up with 310 WHP and 252 WTQ with a wicked low end pickup. I'm running 275/30/19's in the rear... and the car is sliding everywhere from the torque. Time to go STI hunting.. :ylsuper:

Check out the dyno ! The first run (red) was with the Interceptor stock base map and no tuning.... and the final run (blue) was after we've finished tuning.

congrats finally greddy turbo that cracked 300whp.

Power still peaks early - around 7k?
Also, just to clarify, the gain from 267 to 310 HP was going from 7psi to 13psi?

The key to making the GReddy kill 300HP is to hold boost longer. So, what does your boost curve look like now? From the power peak, its looks like you're still loosing at least some boost with increasing RPM. What was the boost at the peak power point?

Wow thats crazy, congrats on the results!

wow, a 310 rwhp rx8 must be a lot of fun!!!

Awesome.

you know 300 hp to the crank is good, but 300whp is supa crazy @ss stuff.

Dang! I bet thats fun! Congrats man and good job scott!

That's amazing. It must be one hell of a car to drive.

It peaks too early I think.

Hmm, but still ... sweetttt..... 310rwhp ... yumm .....

Congrats Bro!!

Bad ass!

Lookin' Good!!

-hS

it peaks to way to early, very nice though congrats man 300whp rx8 should be loads of fun!

Now just replace the shitty turbo from the Greddy kit with a good one and you'll be all set.

Oh my god, you created a monster

And how do you propose on doing that? You clearly have no idea what you're talking about. You probably don't know where the greddy turbo is mounted, you don't know what size turbo can fit down there. You probably don't know why a bigger turbo will help because than you'ld know there's other ways to solve the issues at hand.

RRRRR, sorry for ranting, but you're an idiot.

EDIT: Oh, and you also probably don't know the real world benefits to having the smaller and "shittier" turbo from greddy.

-hS

wow,
said well.

btw, great job scott. hope you got to relax a bit while you were up there.

beers :beer:

:rofl:

Is it over? Can I look now?

http://www.raceworx.com/imabandwidth...p%20thread.gif

Damn, Very nice.
I wonder how much that external wastegate helped out. I'm very interested in what your boost curve looks like.

RRRR, cr@p. I should of just let it go. I don't want to steal from Hybrid-RX8s thunder. His gains today are a great milestone for our community here.

And how reliable it is

wow....a 310whp rx-8.....sounds nice dont it
:Eyecrazy:

just as i thought, just give the 8 time and this is what happens....

umMm do i have to be the first to ask..
what 1/4mile do you see at 310whp?...

you did not piss on this thread dubb did. you just said what everyone was thinking, you are free and clear.


beers :beer:

Wow...nice, I'm still weary of Turbo's long term effect on the Renesis (also since I don't have any turbo experiance) but 300whp is all I'd ever want out of the RX8.

Now...get to a track and report back your times.

-wrong thread-

If your wondering why the hp/tq doesn't cross at 5250rpm, it's because the values are not matched up on both sides.

Can you record a datalog of your boost curve with your Interceptor and post a copy of it? We're dieing to see how that external wastegate affected things.

Awesome results though!

adrian didnt you replace the greddy turbo with a bigger one ???

jesus, Scott gets one day with your car and hits 310whp!


hahahaa...all I can say is my car is next the mazsport queue!

You had Scott fly to Toronto to tune your car? That's insane! :Eyecrazy:

It's amazing what cold Toronto air will do providing you get enough fuel to it!!

So how much did this whole thing cost?

I posted in another thread, that once the Renesis gets properly boosted in mass numbers, and we get them all tuned right, all the other car forums will suddendly change their attitude about the RX8 and it's capibilities. My hat's off to Scott for another sound tune job.
:worship:

The problem with that statement is their cars are slightly better performers from the factory, whereas we have to spend a fair amount of money to overtake them. My $0.02.

I know, but at least we can give them a run at the track now :)

A run?

All you need is about 280 to the wheels to beat them in a straight line! :ylsuper:

Have you Dyno'd your car yet MadDog? or maybe done a 1/4 mile run? I'm curious. :P

Scott's the freakin' man! Now if I could just find a free weekend...

good job Scott!

I've been tempted to go get dyno'd, but I haven't done it yet. I want to get an exhaust first. I'd like to do a before and after, but at $65 just to strap it down, I'm starting to loose my willingness to do experiments!

I can tell you this though. I can beat stock STi's by a length in something close to a quarter mile and I think the stock STi is in the low 13's. I run wheel-to-wheel with a slightly modded (catless) STi.

I definitely go to the dyno after installing the exhaust in a week or two. I want to know, too!

You have an all OEM exhaust at the moment?

MadDog, which exhaust are you going for?

Yeah, I still have the OEM exhaust. I've been eyeballing the TurboXS exhaust, of course. But at a grand, that's pretty steep. There's a guy here in town that will fab a custom 3" exhaust for about $350. I'm thinking of going that route. I mean, for the cost of just the TurboXS midpipe, I 'll have the entire thing. I'm willing to bet that most (>85%)of the gains from the TurboXS setup come from stripping the cat and the 3" tubing - not anything to do with the quality of the Y joint or the mufflers. So the cost savings will more than outweigh the couple of HP that this guys custom jobber might lack.

cool

The greddy turbo is too small ( for big gains on the topend ). fact. it's cfm above 7500 rpm is too low. it may handle 20psi at lower rpm ranges but it isn't flowing enough air at higher rpm ranges ( it works fine on a skyline or other car where this isn't a problem ). the pressure is irrelevant, it's the amount or air that the car needs. if you want more power you are going to have to move the turbo ( not enough size in the "greddy position down low") do your own manifold.. and get a bigger turbo.

Bullseye actually makes a new compressor housing for the greddy turbo that keeps the same hot side and mates it with a t04b compressor wheel, that fits in the current location;

I'am glad to see the power is getting up there, mine is 284whp with the Greddy. But like your graph my boost falls off too at around 6500.

What I'am hearing is that it's not the Greddy turbo so much as they believe the intake on the engine can't flow enough. I hear there will be testing to compare the same turbo on a
13b, all things being equal..

I hope this does not prove true. Unless someone makes a new intake manifold at a decent
price... Maybe it would be nice so we can have a nice polished intake... We'll anyways that
what I hear...

Depends on what the user wants, it sounds like this turbo is well matched to this engine for low-end response which is what the engine needs the most

how soon do you get boost? I'd like to see a boost curve

I call BS,

the Renesis has the largest intake ports on any rotary ever. They're about the same size as a LARGE street port on an older 13B. Unless Mazda designed the runners small to keep high intake velocity, but then the engine would've had smaller ports.

Whoever is saying this has no idea what they are talking about. The Renesis can easily flow as much as a 13B. It had better. It has bigger ports and a better intake manifold! I wouldn't worry too much about this being true.

The turbo is too small to do much more. Scott is doing a great job of getting every last little bit out of it but it's just not capable of much more. Don't get too concerned about the rpm's as much. Think about it this way, would you rather have a 310hp engine where the power peaks at 7000 rpm or would you rather have a 310hp engine that has it's power peal at 9000 rpm? I know that people would rather have the same power curve but have it keep going up past 7000 rpm but from these 2 options I'd rather have a 7000 rpm redline. It is less stress on the engine than a higher redline.

Someone will need to install a nicer larger turbo to get more power and have a higher rpm range but for what this one is designed for, it's pretty good. It may be hard to get a different turbo down in the same spot. It should be possible to do a slight compressor upgrade in the same location but I seriously doubt it would be a huge gain. You will really need to move the turbo to a different location with more room so you can fit a larger one. The turbo manifold is a pretty big compromise from a design aspect in this location anyways.

Just be happy that it cracked the 300rwhp mark. We are slowly seeing the power on these engines go up which keep proving those people wrong who say it can't be boosted without blowing up. It's all in the tuning as has been proven.

Who will be the first to 325? 350? 375? 400? We'll find out yet...