How do I get 400whp reliably in 7AT 2011 370z

Andyy

How do I get 400whp reliably in 7AT 2011 370z

TongMan

Once you modify a stock factory setup, reliability goes out the door.

StealthZ

GTM supercharger?

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Past rides: '07 350Z San Marino blue, '09 370z Brilliant silver, '11 Evo X Phantom Black (felt like a brick but did anything) '13 BRZ Satin white (so much fun) now driving the dream.

Jordo!

So far, you can't.

You'll need boost and the jury is still out on whether or not the stock trans can handle it without a rebuild.

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Andyy

What about the transmission?

Jordo!

To the best of my knowledge, at least two boosted 7AT's have failed. Whether those failures were due to tuning (e.g., shift firmness can be tuned) or mechanical limitations (i.e., gears simply failing from over power) remains unclear.

My advice would be to call GTM, do some searching, and spend lots of time thinking and considering before proceeding.

Good luck!

P.S.

You can get it to 300 whp pretty easily tho -- check out my dyno thread. Search for Proven Power.

EDIT: There, happy? Nothing misleading here.

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Econ

although you wont increase power, the most "reliable" way to increase performance (assuming thats what youre going for) is to take the car on a diet...

you can easily get this car down to 3200lbs w.o loosing ALL of the goodies. Its a lot easier for 300whp to move a 3200 lb car than a 3500lb car

new seats
no spare tire
lighter battery
no hardware
ligher exhaust
lighter wheels
some carbon fiber body peices...
lighter rotors

those are just some of the easier ones

wheee!

I believe all you have to do is add a manual transmission and Miata doors...

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Jordo!

The former don't matter

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Blue370tt

The quote below is part of the UNTRUTH being spread on this forum. ONLY 1.....yes 1.....7AT has failed so far and it was on an SC install. It belonged to member shumby and he was a very early adopter of FI. I have talked to him through email and he has stated that his install WAS BEFORE they knew they could tune the tranny on the 7AT. His car was also very high miles before the install. I have been running 490rwhp on a twin turbo setup on my 370 7AT for over a year with no MAJOR issues. Sam@GTM would be the best person to talk to on this subject. BE AWARE that the 6MT guys will bash this tranny and will tell you cautionary tales that are not true. Many people on this forum are running 400+ hp on their 370 7AT's.

#452-LE

Tiger blood.

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'06 R6 track,'06 R1-LE track,'09 848 street,
'11Duc Multistrada 1200ST, '07 STi T-back
'09 GTM stg2 TT-370Z-7AT (470whp/ 422wtq @10PSI)

wheee!

and Shumby failed to install the Miata doors as well....

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Jordo!

To Blue370tt:

Eat my ***:

Confirmed 7AT failures:

1. Shumby

2. this guy
7 speed good it just can not believe this.

Unconfirmed:

1. One identified by a tuner in my area -- I'll allow that this is hearsay.

2. And I thought at least one other on here -- anyone???

If we go only with the confirmed failures on here, there are two. How many people have boosted their 7AT's? 5? 6? Let's assume 6 -- that's 2/6 or 33% failure rate. Let's pretend it's 10 -- that's a 20% failure rate.

If there's less than 100 people boosted I want to know what the fvck went wrong before I risk destroying my new car. The failure rate is way too high.

People can take whatever risks they want with their own car, but speaking only for myself, until the reason for the failures and a reliable solution is clarified, I'm holding off on boost.

Thanks

I prefer to err on the side on caution for a brand new 30K + car...

EDIT: Okay, so WHY did the others fail and why is it that yours has held up?

Don't be a smart *** -- if you have no idea, then all you can do is say that yours hasn't failed! That's great -- I certainly don't wish it to, but why should your positive experiences be given more weight than the negative experiences of others?

If we don't know, then "the jury is still out" is a totally fair assessment.

If there are 10 boosted 7AT's and 2 failed, that's still 20% failure rate! That's ******* high! I want to know how to avoid that before I lay down several grand, thanks.

Jeez.

P.S.
If yours eventually fails will you post an apology? Don't disreagrd the failure rate just because yours has held up -- and I hope it does -- but your sucess story doesn't make the failure stories any less serious.

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KaienZ34

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Blue370tt

More Bull crap.......guy #2 is in thailand and no one could ever really tell what he had done. YES, the suspicion is that he had a stillen SC, but that was never determined. Your use of this is another great example of people taking 1.....yes ONLY ONE......failure and trying to kill the 7AT transmissions rep. I talked with Shumby by email and his SC install was AFTER many miles (over 70,000). Anyone with a brain knows that putting ANY FI situation on a high miles car is probably going to lead to some kind of failure.

UNTIL WE HAVE ANOTHER VERIFIED 7AT FAILURE YOU CAN JUST STOP......PLEASE STOP! Some noob on this forum is going to run with your bull and these UNTRUTHS will just continue.

I have done EVERYTHING in my power to protect my tranny, but, if it does fail, I wont shy away from letting everyone know. As hard as I push my car DAILY, I woould think it would of happened by now. Its been OVER a year and its still fine.