turbocharger on a AT - Is it a big performance boost?
 

Hi, this is my first post on this forum but i have been browsing its pages for a few weeks now. I have a few questions about turbocharging the rx8 on a AT, and also involving the Cobb Accessport.
1.Does a Greddy turbo add a noticeable amount of power on an AT? Basically, I want to know if it would be worth the upgrade on an AT. And I will be getting a 6 port AT

2.Does the Cobb AP remove the speed limiter on the AT models? I have read on Mazdamaniac's site that it does, but I have read otherwise on this forum.

3. Is a turbo reliable?

4. How would I go about changing the redline to 9k in an AT? I have seen it someone do it on this site but I wasn't sure how it was done. Can the Cobb do this?

Oh, and my name is Steven and I am 17 years old. I will likely be getting the RX8 in about 6 months. I know it's early to be thinking abut a turbo but I just want to know the answers. And I know manual > auto but I don't want to have to deal with a MT in LA traffic.

Sorry if these questions have already been answered; could you just post the link and I will check them out.

Thanks
Steven

learn to drive a manual before you attempt to turbo. ;)

no - one on here has really got a decent result turboing the AT so far . If they have it has not been well documented . However there is no reason you could not get a 4 port AT to 250whp easily just with the Greddy kit .
Make sure you get a 6 port if you want better than that .

09Factor has enjoyed his turbo 4-port quite a bit.

1. Yes it is capable.

2. No

3. Depends on how you drive and maintain the car.

4. AccessPort

Yea i have a 05 auto as well n was thinking of going FI but i rather just switch it to a manual first then turbo it :).

i feel you steven i have a AT too and i wish i woulda got a MT but it is what it is and i'm going to make the best of it i would like to turbo mine too but i dont know yet i want to start small first then work my way up there i have a 6 port so i should get more out if it.

What do i need to know / do before i turbocharge with Greddy kit on my 03 4 port AT rx-8 ?

Read the power forums. Like, read a LOT.

Is that your first engine? How much power are you aiming to make? How familiar with cars are you? How much are you willing to invest? What other modifications have you done on your car? Is there anything wrong with your car right now?

It's strange that so many people with auto's or 4 port engines wonder if forced induction is worth it or can be a worthwhile performance gain. My response to that is that there are a bunch of awfully fast 1.6L turbocharged Civics running around out there and you guys started with more power.

Those civic engines don't have the same stigma, regardless of how accurate that stigma is =p

Yes it my first engine and it has 45km on it.. I'm aiming for 250hp + ? Our stock hp now should be around 140hp for ther 4at rx8 after dynoed .. this is what i found on forums..and i found a reasonable price used greddy turbo kit..but im afraid it will give me hell lot of trouble and also blow engine..i just want my 8 slightly faster with the bolt on greddy kit without throwing out so much money on it or giving me so much trouble..

thats's why im here to ask what do i need to do or mod or change b4 i go for complete bolt on Greddy turbo kit. So i can decide what i can do for it..

current mods are Racing beat exhaust 3'' and rp supercat midpipe..thats it..im still using my freaking stock air intake!!

I think the base Greddy, with the smaller turbo, would be ideal for the 4-port? 250rwhp is a good number to expect out of the 4-port, most 6-port engines are looking at 300rwhp, with the exception of a few breaking 300+ to 400rwhp.

For the base Greddy kit, as long as the turbo and parts weren't made crappy, and as long as you don't change it out without being knowledgeable (increase the turbo without changing the wastegate, etc), then it shouldn't give you any trouble.

There is absolutely no reason why a 4 port couldn't be made to easily break 300 rwhp.

I suppose then it'll come down to volunteers and the money they are willing to spend.

I myself would see a budget of maybe $10-12k total in a turbo project. Whatever HP I can get out of that, I'd be happy with.

Totally agree . If anyone has any doubts they just need to see Cjickenwafers' latest dyno where he made 330whp before the aux. ports opened on his 6MT . At that point his motor was a 4 port ......
There is some doubt over what boost he was running at the time - perhaps as much as 18 psi so it's going to take someone with a few balls to want to push that far .

Oh hell yes I do! liked it so much bigger and way better is in the werks.

Amen. Going to try, Baller status hopefully.

Balls or just plain 'ol damn it all.

If I had a 4 port RX-8 and a $10K-$12K budget, I'd get 400 rwhp out of it.

i don't think i've spent $5K yet on all my turbo kit and upgrades

I just cracked 231 without a turbo last night. On my little 4 Port. Zoom Zoom Zoom.

/\ awesome work Easy . Dyno ?

That was with the AP Dyno mode. Actual Dyno is this coming Sunday. So we'll see what she does. I was thinking a little bit less than that. But if it does that! :SHOCKED:

All good!! :naughty:

Whoah, in that case, I've got a good future to look forward to =x

i've got very lucky finding the deals i did on all my upgrades.

good stuff - good luck at the dyno man . Are you testing some type of timing device for BHR ?