Forced Induction & 7AT 370z Info

blackonorange

Throttle body harness was broken? How?

blackonorange

And if the feed line was cracked it didn't piss fuel everywhere?

XiP

Here's my plans so far for forced induction and I'm very worried about the reliability of my car. I want to get everything together and cooled/upgraded properly.

Already ordered:
Fast Intentions Twin Turbo kit
Fast Intentions Oil Cooler kit 34 row
Fast Intentions Cat Back Exhaust with high flow cats
GTM HD Transmission cooler kit

Should I get a GTM valve body upgrade or a transmission upgrade which inclues the valve body:

Valve body upgrade kit:
GTM Motorsports*::*AUTOMATIC TRANSMISSION*::*Valve Body Upgrades*::*GTM Valvebody Upgrade for 7 speed A/T

Transmission upgrades (which one do I need?):
GTM Motorsports*::*AUTOMATIC TRANSMISSION*::*GTM Stage 3 Transmission Upgrade
GTM Motorsports*::*AUTOMATIC TRANSMISSION*::*GTM Stage 3 Transmission Upgrade
GTM Motorsports*::*AUTOMATIC TRANSMISSION*::*GTM Stage 4 Transmission Upgrade

Do I need a differential oil cooler or is this unrelated to forced induction?
https://www.gtmotorsports.com/produc...1&cat=0&page=8

theDreamer

Seeing you have HFC, why did you pick those over down pipes?
Also, what are your goals for this kit, reliable street power, light tracking? Do you have a HP limit in mind?

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theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN
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KaienZ34

This is what i'm looking for out of my 7AT, with the new gtm tt kit.

Just street fun, and power around 400-450 whp & 380-400 wtq.

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tower74

You should be fine. 481hp and 427wtq and even after I tore the system off the car it still ran like a champ. I had zero slips, clunks or anything. As Dreamer said 6th and 7th are off limits. I only pushed it from first through 3rd most of the times. Hell I even dumped it into 3rd from 6th on the highway for a quick boost.
I guess I had a Frankenstein transmission or something because I had ZERO problems with mine and had 2 1/2" pipes and no transmission cooler.

theDreamer

By what has done with the high 300/low 400 TQ boosted cars it seems a good solid transmission cooler & tune can hold up fine for awhile with street driving. Keeping in mind that the top couple gears will be off limits for boosted runs.

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theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN
theDreamer's Silvia // URAS // GREDDY
Houston Zs // Facebook // Twitter // Instagram

XiP

I'm probably going to get a conservative tune because I'm looking for reliable street power and I don't track at all. 400-450 hp /380-400 tq sounds good to me as well.

tower74

Just keep a towel with you....to clean up the mess you make when you first get on it.

KaienZ34

Cool deal man thanks, i was thinking trans cooler, tune, and the VB upgrade. I just didn't know if this would be enough for the 16g gtm with 9-ish psi and 2.5" FI catback.

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elperuano

Lol

elperuano

blueranger

In your opinion which system is a better match for the 7AT?

TT or SC ?

Let's say with a VB Upgrade, Trans Cooler and a proper tune.

Some of my thoughts were a SC because of its lower torque would help the Transmission last longer or the TT because when you hit the gas the lag allows your tranny to downshift where the SC would not ??

Your thoughts

Mike@GTM

Bingo. That is the advantage of the Twin Turbo on an automatic. When you hit the gas in the higher gears, the turbos aren't producing much extra torque and the transmission will downshift to a lower gear. The beauty of that is not only can the lower gears handle more torque, but it puts the engine in the power band for a nice wallop of acceleration.

The Supercharger, on the other hand requires a more attentive driver using manual mode since rolling on the throttle in higher gears will put more torque through the gear before the transmission downshifts in normal mode.

That said, our Valve Body upgrade will really help out with that since the transmission will downshift more readily.

@theDreamer I wrote an article a while back regarding forced induction and automatic transmissions if you would like to add that info into your first post, here is the link: http://www.gtmotorsports.com/Technic...ansmission.pdf

-Mike

theDreamer

I believe from the failures we have seen, in the upper gears, it has been the TQ that is more responsible for the damage than the HP. Mainly because the TQ is what is going to punish the transmission early on and fast while HP gradually increases throughout the powerband. Saying the SC lower TQ will help in the long run probably is not ideal as both are going to put extra strain on the transmission.

Now onto the specific TT or SC, since you threw in the VB upgrade either will be great. At that point it will boil down to what your goals are & expectations for the kit(s). Some of your key differences are, SC is a bit more instant response while the TT has that small spool (.5 of a second or less), the SC kits have a bit more linear progression through the powerband where a TT is very upfront.

__________________
theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN
theDreamer's Silvia // URAS // GREDDY
Houston Zs // Facebook // Twitter // Instagram