twinturbo with 7spd auto .
 

hey guys coming from an 06 greddy tt 350z spd , i'm swtiching to a 7spd auto 370z i was just wondering how much horsepower could the auto tranny handle on the new 370z ? also wondering if any1 done tt to there 7spd auto 370z yet ? btw flamesuit is on in case any1 decided to flame .

no flame suit need, I think it's been done on a G but not a Z as of yet, I might be wrong.

There is a 370z 7AT TT done, forget which shop did it, will see if I can find the thread.
Should be another one done soon. ;)

Z1 did one. GTM TT.

That was it, thanks. :tup:

Note: I have spoken to a local tuner who allegedly worked on a turboed G37, and apparently the torque converter failed... :icon14:

Now that is weird, and I don't have all the details (sounds like improper load readings -- which could all be due to a poor tune -- caused the lock up mechanism to go in and out too frequently, eventually leading to failure), but personally I would want to hear LOTS of feedback from the 7AT guys who are boosting to hear how things are holding up before I plunked down several grand on this...

Actually, I'd like to hearback from the MT guys too... just want to make sure everyhting is holding together.

You should email gtm and ask how much can the 7 speed handle. They're pros.

Yeah Baker Tuning should have one out soon. Just ask Sam he can tell you what you need to get the job done.

Stillen also has a supercharged G37 with the 7A/T that has been beat on for 40,000 miles and has not had any transmissions issues. I would assume that the longevity of the 7 speed automatic transmission (or even the 6mt) would be left in the hands of the driver: this would probably include rolling into the throttle, making conservative boost maps, avoiding sharp kickdowns in the lower gears, and making sure the trans oil temperatures are kept in check.

had my gtm kit for aboout half a yr now, holding up fine

^^ how much power are you making at the rear tires ?

Gtm stage 1 , 310kw@6psi was told can easy do another 2-3 psi with harm, hopefully getting this done over the weekend

Edit
With no harm I mean lol

Just make sure you have installed a transmission oil cooler and you should be fine.

Also, if you're cruising in higher gears and wanna step on it don't keep it in D or DS and step on the throttle hard. It puts the transmission in a lot of stress because the engine is suddenly trying to make more power while the trans is trying to shift down all at the same time. Use the M mode, downshift to the gear you want, THEN step on the throttle. That's pretty much it.

Tao

No offense but you've been running a more conservative setup than what GTM specify. So I don't know if the experience with your car to date is an accurate description of what others can expect.

Having said that, I'd be keen to know how it goes once you increase the PSI and have been driving the car for a while.

Good luck with it mate and please keep us posted.

Lol I only plan to keep 8psi as a high setting when I need that extra bit, I think 310 atw is plenty on the roads. I think cars is about balance, not raw power. Come to the cruise next month when we head up black spur, even you have 400kw , a mini cooper can over take. I don't mean you but my English is not gd

Oh btw think there's only a few 7sp had force induction 1sc and 2 tt, think all about 6psi and all stage 1. Can't compare with manual, cause we talk about transmition, I'm pretty sure all the other tt out there have had a clutch upgrade, engine holds up fine but think that's the difference between the auto and manual. And y force induction 7sp are not boosting it so high but only time will tel how much the stock tranny can hold

Would love to come to the cruise but I'm out of town for a while.

BTW, who did your install and are/were you happy with their work?

Lol I told you about million times who done my install hahaha let's just say I'm happy with the results . Let's not get into products and who installed it.

Sheesh, sensitive bloke. Ok then.

:confused:

Lol anyway come to one of our cruises 1day and talk to all the guys there, they are more than happy to help, plus get don't spirited driving on the way hehehe :)

there a lot of 5AT guys boosted. Terry has a GTM Stage 1 in his 5AT G35 sedan with VB upgrade and trans cooler that's been running for over 2 years now? No problems.

Yeah heard it makes a lot of difference to do a vb upgrade for auto trainees but sadly no such upgrade for the 7sp yet

I could be wrong but I think this link is a VB upgrade =)

GTM Motorsports*::*AUTOMATIC TRANSMISSION*::*GTM Valvebody Upgrade

I might get boosted if I find a car checkup place that doesn't mind boosted cars. but that is extremely rare so I am looking around.

We just performed a tranny tune with the new Osiris update and man what a difference! Still some fine tuning needed to make the car shift a bit smoother but WOW.

tranny tune? you can access the TCM with Osiris? :/

There are some maps on the engine ECU that talk to the TCM to make sure torque output is what it should be.

What exactly are you adjusting here? This is the first time I hear this.

Torque ouput measured in newton meters. This is a new development from Uprev. Another missing map found.

I need to talk to Jared about this :D

I asked them for some more low end power, and they got 330kw, 630nm @3k rpm on 11 psi on stage 1 gtm . Anythoughts on this? I personally think is too much torque for the transmition to hold, you guys think I should asked them to re tune?

As long as the power comes on progressively and in a linear fashion, that should be fine for the transmission. If you want to take extra care in preventing any shock from boost hitting full on at once, roll into the throttle and ramp up the load gradually.

I just had a quick look at the map last night on their computer ( I will post it up once I get it) but its a fairly big jump from 2.5k to 3.5k. They told me to take it easy on throttle but I really think it comes in hard to quick should be at least 3.5k to 4.5k. Anythoughts?