GTM Performance Engineering Stage 1 Turn key Supercharger kit In house Installation.

Jamaica · 06-17-2010, 12:48 AM

Quote:

Originally Posted by SAM@GTM

For 6 psi 7 A/T @ 91 OCT these are exponential results . couple more psi and the set up can do well over the 400 mark.

Sam

....long tube headers??

SAM@GTM · 06-17-2010, 12:50 AM

Quote:

Originally Posted by jamaica951

....long tube headers??

No, stock headers and Stock cats .

Sam

Jamaica · 06-17-2010, 01:07 AM

You dont prefer the headers on the car?

bullitt5897 · 06-17-2010, 01:43 AM

Headers have very little back pressure and the VQ engine requires a certain amount of overlap in valave timing. With the lth there is not enough back pressure while trying to maintain the correct/ideal valve timing. Sam correct me if I am wrong here but tht is my understanding why lth are not ideal for any SC setup and this engine.

Jamaica · 06-17-2010, 01:47 AM

Just want to know before I actually pay for my headers.

CGMobile370Z · 06-17-2010, 05:16 AM

Quote:

Originally Posted by jamaica951

Just want to know before I actually pay for my headers.

With the LTH and VVEL there was not enough back pressure with so much valve overlap to build much boost. I think they said the S/C would only build 4 psi with LTH and CBE.

Sam, I still don't understand why the shop car made 8psi + 450whp and Shumby car is only at 6 psi + 390whp. Is it the CBE or just the tune?

SAM@GTM · 06-17-2010, 09:59 AM

Quote:

Originally Posted by CGMobile370Z

Sam, I still don't understand why the shop car made 8psi + 450whp and Shumby car is only at 6 psi + 390whp. Is it the CBE or just the tune?

The 6 psi is purely related to the size of the pulley right now, We could have gotten more psi by going a smaller pulley, also we have to remember that the 390 RWHP is equivalent to about 410 RWHP on a M/T car .

You can get more boost by going a smaller pulley but for a guy that drove 2300 miles and waiting on his car in hotel room on us to finish the work, I felt the 6 psi is playing it safe right now. there was no room to for anything to go wrong .

Sam

MMC Racing · 06-17-2010, 10:40 AM

Quote:

Originally Posted by SAM@GTM

You can get more boost by going a smaller pulley but for a guy that drove 2300 miles and waiting on his car in hotel room on us to finish the work, I felt the 6 psi is playing it safe right now. there was no room to for anything to go wrong .

Sam

Big mistake on his part. When you take your car significant distance to have a specific shop do the work, it is silly to take the ultra conservative route. He could have found joe blows shop down the street to do that. He should have planned it out better so you had all the time you needed to take this farther.

390 is a ho-hum number and I look forward to seeing future builds at 8PSI+ on a G37 before I make my choice of kits.

Zsteve · 06-17-2010, 06:30 AM

is there a reason for only 6 psi? I thought the kits were suppose to run 8 psi.

John@Z1 · 06-17-2010, 07:38 AM

All that power with stock cats. That is insane on an auto. Very nice GTM!

theDreamer · 06-17-2010, 08:29 AM

Congrats Shumby.

FuszNissan · 06-17-2010, 09:21 AM

Looks good even for a G....

bullitt5897 · 06-17-2010, 09:37 AM

yall have to remember he has an AUTO transmission and the shop car is manual. The auto transmission will not make as much RWHP. Effectively if he had a manual G it would of been over 400rwhp @ 6psi!!! that is freakin nuts!

FuszNissan · 06-17-2010, 09:38 AM

I am impressed with the Tq at such low boost on an AT. Great Job Sam

Valentino · 06-17-2010, 11:39 AM

Quote:

Originally Posted by FuszNissan

I am impressed with the Tq at such low boost on an AT. Great Job Sam

06-17-2010, 01:43 AM	#4 (permalink)
bullitt5897 Premium Member Join Date: Jan 2009 Location: North GA Posts: 6,831 Drives: Twin Turbo Z34 Rep Power: 3684	Headers have very little back pressure and the VQ engine requires a certain amount of overlap in valave timing. With the lth there is not enough back pressure while trying to maintain the correct/ideal valve timing. Sam correct me if I am wrong here but tht is my understanding why lth are not ideal for any SC setup and this engine. __________________ *Shop Cars: 2013 318whp Nismo VspecII 370z SOLD, 2009 1000hp+ 93oct 4.0L TT 370z Fast Intentions STAGE 4 #054*

06-17-2010, 06:30 AM	#9 (permalink)
Zsteve A True Z Fanatic Join Date: Sep 2009 Location: TX Posts: 3,298 Drives: the 2 balled club Rep Power: 23	is there a reason for only 6 psi? I thought the kits were suppose to run 8 psi. __________________ 2010 LS3 C6 Silver coupe corvette

06-17-2010, 07:38 AM	#10 (permalink)
John@Z1 The370Z.com Sponsor Join Date: Nov 2008 Location: GA Posts: 1,589 Drives: Turbos Rep Power: 21	All that power with stock cats. That is insane on an auto. Very nice GTM! __________________ Z1 Motorsports will beat any advertised price on Nissan OEM Parts! 770-838-7777 ext 311 AIM: JohnatZ1 email: John@Z1motorsports.com

06-17-2010, 08:29 AM	#11 (permalink)
theDreamer A True Z Fanatic Join Date: Feb 2009 Location: Texas Posts: 30,879 Drives: 370z Rep Power: 4212	Congrats Shumby. __________________ theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN theDreamer's Silvia // URAS // GREDDY Houston Zs // Facebook // Twitter // Instagram

06-17-2010, 09:21 AM	#12 (permalink)
FuszNissan A True Z Fanatic Join Date: May 2009 Location: St. Louis Posts: 14,275 Drives: Pure Sex Rep Power: 544	Looks good even for a G.... __________________ Mods: Too Many to list! LouFuszNissan ZDAYZ 2012

06-17-2010, 01:07 AM	#3 (permalink)
Jamaica A True Z Fanatic Join Date: Mar 2010 Location: SoCal Posts: 15,362 Drives: Under boost Rep Power: 75	You dont prefer the headers on the car?

06-17-2010, 01:47 AM	#5 (permalink)
Jamaica A True Z Fanatic Join Date: Mar 2010 Location: SoCal Posts: 15,362 Drives: Under boost Rep Power: 75	Just want to know before I actually pay for my headers.

06-17-2010, 09:37 AM	#13 (permalink)
bullitt5897 Premium Member Join Date: Jan 2009 Location: North GA Posts: 6,831 Drives: Twin Turbo Z34 Rep Power: 3684	yall have to remember he has an AUTO transmission and the shop car is manual. The auto transmission will not make as much RWHP. Effectively if he had a manual G it would of been over 400rwhp @ 6psi!!! that is freakin nuts! __________________ *Shop Cars: 2013 318whp Nismo VspecII 370z SOLD, 2009 1000hp+ 93oct 4.0L TT 370z Fast Intentions STAGE 4 #054*

06-17-2010, 09:38 AM	#14 (permalink)
FuszNissan A True Z Fanatic Join Date: May 2009 Location: St. Louis Posts: 14,275 Drives: Pure Sex Rep Power: 544	I am impressed with the Tq at such low boost on an AT. Great Job Sam __________________ Mods: Too Many to list! LouFuszNissan ZDAYZ 2012

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