Renesis07

iTrader: (1)

You can tune it yourself with AP

lilring

iTrader: (11)

Every shop varys on how much they charge. But in order to tune you car you need either a aftermarket ECU or the Cobb Accessport. The Cobb keeps your stock ecu and you can flash it how you want it. You can buy it from MM and he will enclude 3 tunes i belive.

If all You have is an Exhaust and mid pipe, you should wait until you get a little bit more mods. but it is all up to you.

Renesis07

iTrader: (1)

Spend 300 and powdercoat your rims + front lip on ebay.

ZumnRx8

me too, along with the accessport to raise my redline a tad bit :-), Im AT by the way



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+12-14 sec 1/4 passes?

lilring

iTrader: (11)

Those pics look like sex to me.. I cant wait until summer so I can work full time to afford the kit

ZumnRx8

^^^^Atilla is selling rims for 450 i believe 18", pretty nice and def good looking on a BB@@@|!!!!

dozer

iTrader: (3)

^agreed!

Renesis07

iTrader: (1)

55 shot of nitrous on an AT will not put you into the 12's.

MMAAYYBBEE high 14's. My guess would be low to mid 15's.

mdw1000

By the way, at least if you are a 4AT, the transmission will not shift over a certain engine rpm. Phil has experimented with this quite a bit. I know over 8500 it won't shift. Also, at a certain point your power starts dropping off with the 4-port anyway.

You also have to be careful raising the redline too much on an AT. Bad things can happen I've been told, like things exploding if you overrev an AT too much. Haven't heard about this on the 8 specifically, but I've heard something about it on other cars.

ShellDude

iTrader: (12)

Actually, with the stock rev limit, it won't shift over 7,500 RPM. If you move the Rev Limit, the shifting condition moves with it.

Do you have any actual details on the "don't overrev an AT" observation? If this is based on fact rather than conjecture, I'd really like to know more about it, if only for the educational value.

mdw1000

I actually had my rev limiter set too high on the IntX at one point accidentally. It was set at 9000 rpm. The trans would not shift up there. Phil has experimented and found that the trans won't shift over 8500 or so rpm. This is with the 4AT. Not sure about the 6AT.

I don't have any first hand details on it, and have never heard of it on an RX-8 just heard it mentioned by someone who I respect when talking about another car. I do know that they set the rev limit lower for a reason. I'm sure it is conservative, but I'm sure over a certain amount you are much more likely to do damage. Maybe someone with more knowledge of the internal workings of automatics transmissions will post here. The articles I've read say that the rev limit is set lower because of the torque converter, but I've never found anything specifically in print to say why exactly that is.

laulongfei

[QUOTE=mdw1000;2807570]Also, at a certain point your power starts dropping off with the 4-port anyway.

I notice that too, sometime my car feel lose of power, I thought its because the transmission heat that cause it. I think it has to do with the ECU that do the shifting. Maybe rewrite or adjust can help? what do you guys think?

ShellDude

iTrader: (12)

Thanks for following up. I would've never thought to have advanced the 4ATs rev limit beyond 8500, just from a "redline" perspective which is why I thought you mean't 7500. The "won't shift" condition though, it happens even with the redline at 7500. My thoughts on it when it happened to me was that it was a by product of the rev limit itself and the systolis(spl?).

mdw1000

Don't take anything I say as gospel. I'm wrong much more often than I'm right

Ray - have you been able to get the 4AT to shift over 8500 rpm?

So what happens if you overrev an automatic transmission to the point of failure? I assume something breaks. Can it be dangerous?

ShellDude

iTrader: (12)

Take this as gospel:

If you want to be able to shift at 7,500 RPM, set your rev limit to 8,000 RPM.

If you want to be able to shift at 8,000 RPM, set your rev limit to 8,500 RPM.

If you want to be able to shift at 8,500 RPM, set your rev limit to 9,000 RPM.

If you want to be able to shift at 9,000 RPM, but an MT

mdw1000

[QUOTE=laulongfei;2808948]I think it has more to do with the fact that the 4-port can't ingest any more air after a certain point, but i'm not sure on that.

Atilla

iTrader: (1)

^^LISTEN TO THIS MAN!!

dhan! - if you're looking for rims - i'm selling mine for $400 - i go up to the bay area once a month - if you're interested, let me know

link in sig

laulongfei

[QUOTE=mdw1000;2813165]do you think greddy turbo should fix that, since your hypothesis are 4-port can't ingest air. a turbo force in air. because the random loss of power most likely happen during the hotter days.

i will jsut start a thread just talking about 4 port engine.

laulongfei

I wonder if the 09 automatic trans will fit auto 4-port or 6- port older model.
What i really want if is that if the differential will fit on 4-port trans. I think the newer model runs a 4.777. buying Feed cause 1000 dollar.

mdw1000

From what I understand the new MTs have a 4.77 standard. You would need to find out if a new MT diff will fit an old AT.

mdw1000

[QUOTE=laulongfei;2813378]I would definitely get your random loss of power issue fixed before thinking about any sort of turbo. Is your car still under warranty?

laulongfei

[QUOTE=mdw1000;2817136]i have run couple tests and it seems have to do with the heat. hotter=slower colder=faster throttle response/trans response.