GUITARJUNKIE28

well you gotta remember mazda's had like 6 or 7 flashes out for the ecu... since the emanage is % correction, instead of a "stand alone" map, it will react differently to different ecu flashes.

i'm sure greddy made it work beautifully on their test cars before they released it. not to mention a lot of noobs are doing the tuning themselves...'nuff said

so i dunno if it's so much greedy ******' up on the tuning, or a combination of everything else...

ddub

From what I've seen the base map from Greddy and the ones tuned by people and/or their tuner are showing similar results in power, but safety is another story.

I'm just not all impressed with the kit in general, but that's me. Personally I think Mazda should've made the rx8 a 20b n/a renesis, but maybe I'm just crazy

88rxn/a

iTrader: (6)

what are you using to control your spark/fuel and such? curious.

GUITARJUNKIE28

hlatech e8

ZeroDrift

iTrader: (1)

The only thing about the Rx8 high comp setup with forced induction.. from what i understand about the renesis, is that it's setup so that there is no 'valve lap' or the exhaust never has an opportunity to enter the induction cycle. While our older motors allow some exhaust to slip by. That would allow them to run higher compression because it would reduce the chance of detonation. Not 100% sure that I'm accurate, but I have read that the whole timing of the rotor has changed as well as many other things that allows them to have higher compression.

iceblue

9:7:1
10:0:1

Not that big of a differance

GUITARJUNKIE28

yea, you're pretty close on that. the zero overlap allows the intake charge to be totally clean--no reversion. that would let you run a bit higher compression, OR bump the timing up, OR run a tad leaner....

but keep in mind the greedy kit isn't capable of producing very much power...~300ish whp.. if all you wanted was 300 hp, you could probably run your compression intot he 11's or 12's and just run low boost. we'll see what happens to the renesis motors when they're pushed with larger sized turbos and more boost.

ZeroDrift

iTrader: (1)

Has anyone tried to use an rx8 rotor in a 13b? And is it possible to change the timing/something so that there is no overlap bewteen the exhaust and intake charge? I'm guessing that the 13b can't have the rotor/crank timing altered because the rotor won't contact the housing. (???) Has anyone altered the 13b timing or done any tuning to rotor/crank position (a non oem setting)? -Thanks guys-

TitosToy

i haven't heard of anyone using the rx8 rotor on the rx7's but even if you can use them they're still be an overlap between the exhaust and intake charge cuz you're using the perpherial housings opposed to the rx8's intake/exhaust plates.

GUITARJUNKIE28

a few guys have used the rotors... they're fine if you use the e-shaft too provided you don't spin the motor very fast--so a turbo motor might be the best candidate for those.

mazdatrix warped the apex seals in their test motor, but i think they were spinning it to 9k+ rpm... the renesis apex seals don't like the peripheral exhaust ports.

t-von

iTrader: (8)

True but there's a new programable ecu out for the car and it's allowing more boost.

Don't sell the 8 short. There is also a video of the runs in the link for the ecu.


http://www.rx8club.com/showthread.php?t=68392

ZeroDrift

iTrader: (1)

As far as the rx8's lack of 'overlap', I thought that I've seen some pics/gif images describing the timing difference of the e-shaft and rotor? And as far as the perhiperal (sp?) port goes, wouldnt you ideally want 1 piece apex seals to help keep the apex seal from stressing as its crosses the gap? What would be the advantage to 2 peice apex seals as opposed to 1 piece seals?

ddub

I know all about the Interceptor by Mazsport, no thanks. For that price why wouldn't I just go full standalone? Plus I hate Mazsport, and no one has really proven how well that ECU even works except them. No one has numbers but then, so I believe nothing until an unbiased person does testing.

I have an RX-8, in fact I've been driving it constantly since I put my 2nd gen under the knife, and I read rx8club just as much as rx7club looking for insight and promising possibilities for the rx8. Unfortunately I don't think much out there is proving "fantastic" for it. Personally I don't even want my rx8 to be turbo or supercharged, it'll completely change the powerband and characteristics of the car. It should have been a 20b renesis, Mazda failed me

GUITARJUNKIE28

we would all like to see a 3 rotor renesis, but from a manufacturing standpoint, it would just cost WAY too much to develop a production engine of that magnitude capable of spinning 8500+ rpm's...

GtoRx7

iTrader: (5)

DAMN! That video reminded me of my old setup with a streetport 13B TII and a stock turbo, wastegate shut, would boost 16 psi, and fall down to 4 psi by 7500rpms. They need a bigger turbo BAD!! If they could sustain 242 rwhtq to 8500 that would be 390 rwhp!