Forced Induction & 7AT 370z Info

ANMVQ

I know level 10 makes one, Coop was running one is his( 5spd) tho, Is't there some on with a built trans from them a TT kit and trans has broke twice? I know level 10 is more than working with him on getting retuned and rebuilt but just saying there's issues there.

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Jordo!

There's someone from the UK who did a thread on a Level 10 build recently.

370z 7AT problems with GReddy TwinTurbo tune - what to do?

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theDreamer

I forgot about his build, need to dig into the details.

Looks like:
-Level10 built transmission
-554HP & 465TQ
-Greddy TT kit
-Fuel stuff

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ANMVQ

Here's the one I was thinking about on the G Forum.

Help 7A/T Forced Induction Issues/Problems - MyG37

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theDreamer

Looks like level10 is slowly fixing it, but it being an X & 7AT that throws a lot into the mix. Hopefully it was just the ECU & TCM not playing nice and with some tuning work it is resolved.

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Zerocool

so what I've gathered. Stock 7AT tranny can handle boost from the stillen supercharger. Will it be boosting in all gears or..?

Level 10 upgraded transmission makes it capable of handling up to 800hp so then a twin turbo set up wouldn't hurt.

Cost of the transmission is around 4K.
stillen supercharger is around 7k before install.
twin turbo kit is about 10k before install.

that 4k for the transmission is hefty as ****. Might as well trade in the 7at Z for a 6mt or do a tranny swap if you want boost.

Stillen supercharger gets around 400whp right? not much power for 7k.

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Zerocool

I want to boost mine and I'm having that moment of "why did I get the 7at?"

then again... I don't track the car so Bolt on's and a tune would do fine for more spirited driving. Time to buy allllllllllllllll the bolt on's I can

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EliteXpress

My automatic Z has about 6,000 miles since the kit was installed. As far as the transmission, it seems to be holding up well with the new added HP. Not afraid to run through the gears, in fact have done as much as 153 MPH.

FPenvy

what HP/TQ are you at?

typically SC doesn't put down enough of either to hurt the AT as much as turbos.

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EliteXpress

You are correct sir that's exactly why I went with the Stillen supercharger kit, wanted reliability for the transmission more than anything. 426WHP 336TQ.

FPenvy

yea pretty much if you want boost but not dropping 4k in a tranny go with a SC kit. but then you also don't get the option to hit high HP numbers. it's all give and take to fit what each person wants.

I do believe people have quotes the stock 7AT to be able to handle 400wtq stock.

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Kazzan11236

So, ive read throught multiple pages of this thread a few times

So pretty much, with a 7AT fully stock, can handle the stillen supercharger but not for long reliability?

Of course with the trans cooler, oil cooler, exhuast , tune... Trans is still bound to fail?

My thing is, when on the highway, im usually not in manual mode, and thats when i do most of the spirited driving... Overtaking cars and such... And it seems from reading gear 5-7 is the most dangerous where u cant push the car hard.... And i love stomping on the acceleration on the highway...

Just seems counter productive for me to go FI

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jchammond

I see your's is a 14' with A/T,,,does it have the RC33(3.359) Rear axle Ratio Or do you have the RC36 (3.69)
Cause on the Highyway with the 3.359 in 5th gear (1:1) you can run it up over 170 & closer to 175.[pending speed limiter is turned off] pushing it in 6th, would surpass 200-idk if these cars will stay on the road that fast...160 is plenty for me.

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brucelidat

I think you'll be okay with the stock SC kit since that's only around 300 wtrq.

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EliteXpress

I boost often up top with my S/C Auto, not afraid to go! The other night had a few pulls to a Buck 40 plus and one to 157 MPH and was still ready for more.