GT Motorsports: VQ37VHR Engine Internals Pistons, Rods, Stroker Kits

NewYorkJon34 · 06-09-2011, 06:18 PM

Lol, ya well if I buy the shortblock, I could run the 13-14psi and have 550whp no prob. So it would be money spent. I'm just gonna wait to see what Sam posts

Nitex · 06-14-2011, 11:15 AM

4.5L stroker would be intense.. Did someone post 400/300 pre FI?

98intrigue · 10-18-2011, 09:55 PM

Quote:

Originally Posted by 98intrigue

I'll put this thread on stand by...just in case...

Damn me for jinxing myself.

bullitt5897 · 10-19-2011, 09:20 AM

Quote:

Originally Posted by 98intrigue

Damn me for jinxing myself.

the life of modding!

JB-370z · 10-19-2011, 04:11 PM

Quote:

Originally Posted by 98intrigue

Damn me for jinxing myself.

Too funny man.

FPenvy · 10-20-2011, 05:09 PM

with all the talk in this thread about goin with a different block an whatnot does anyone know how much psi a stock block can take safely? i read the whole thread and didnt really see anyone talk about it besides someone saying they were goin up a psi on their tune.

i'm lookin to go FI with a GTM stage 2 TT over the winter while my Z is in the garage and i'll have 3-4 months to do it right. i'm just looking to hit 500whp for now since 9k for the TT kit is all i really got at the moment. i'll worry bout rods & pistons later when i wanna go over 500whp.

also i got a 7AT. anyone know if theres problems with that so far. please don't bash for me not knowing this i just got my Z in june and new to this engine/tranny so my knowledge is limited.

theDreamer · 10-20-2011, 05:11 PM

There is no real answer to what PSI/HP/TQ the block can handle so far, most of the blown blocks have been other circumstances and so far people running 500whp have been doing alright (more time is needed).
7AT upgrade is being finalized by GTM, they have shown some pieces but not much yet on pricing or other details. Will you need it? Probably not initially, something you can prep for in the future.

FPenvy · 10-20-2011, 05:30 PM

yea i saw on their website some STG 3 AT tranny upgrade for like $5k. thats alot of cash though. i havent found anyone runnin TT on a 7AT having problems yet unless i've missed something lol.

Nixlimited · 10-21-2011, 11:52 AM

Note that asking what PSI a block can handle is inherently an unanswerable question since it all depends on the setup. For example, a small turbo may flow X CFM of air at 20 psi while I larger turbo flows Y CFM of air at 20 psi, and Y > X. I think it's easier to talk in how much HP or TQ a block can handle as measured on a dyno. But even then you have tons of variation between dynos.

wstar · 10-21-2011, 12:58 PM

Quote:

Originally Posted by Nixlimited

Note that asking what PSI a block can handle is inherently an unanswerable question since it all depends on the setup. For example, a small turbo may flow X CFM of air at 20 psi while I larger turbo flows Y CFM of air at 20 psi, and Y > X. I think it's easier to talk in how much HP or TQ a block can handle as measured on a dyno. But even then you have tons of variation between dynos.

Well, and even then, given we're discussing stroker kits that mess with cylinder volumes and compression ratios, even torque testing isn't a valid comparison between different builds of the same basic engine. Just too many variables.

Nixlimited · 10-21-2011, 05:15 PM

Quote:

Originally Posted by wstar

Well, and even then, given we're discussing stroker kits that mess with cylinder volumes and compression ratios, even torque testing isn't a valid comparison between different builds of the same basic engine. Just too many variables.

Exactly.

GambitX · 10-21-2011, 09:07 PM

If your friends with UPREV on FB, you will see they are now doing testing on the tolerences of the VQ motor right now

christian370z · 10-22-2011, 07:47 PM

Quote:

Originally Posted by GambitX

If your friends with UPREV on FB, you will see they are now doing testing on the tolerences of the VQ motor right now

What do they plan on using that information for?

JB-370z · 11-13-2011, 11:07 AM

Sam says that us folks with stage 2 turbos might be able to see 650-700whp. This has to do with the compression ratio as well. So my plan is to try and get to that 700whp mark. I was hoping to get a clear idea of what needs to be done. How much more tuning is involved with changing the compression? Can I use the stock ECU? etc....

bullitt5897 · 11-13-2011, 07:32 PM

Quote:

Originally Posted by JB-370z

Sam says that us folks with stage 2 turbos might be able to see 650-700whp. This has to do with the compression ratio as well. So my plan is to try and get to that 700whp mark. I was hoping to get a clear idea of what needs to be done. How much more tuning is involved with changing the compression? Can I use the stock ECU? etc....

You will need to build the motor, upgrade your fuel system, upgrade your clutch and you can still use the stock ecu. We hit over 1000hp on the stock ecu!

06-09-2011, 06:18 PM	#76 (permalink)
NewYorkJon34 A True Z Fanatic Join Date: Jun 2009 Location: Naples, Florida Posts: 3,041 Drives: 09 Fairlady Z Rep Power: 1065	Lol, ya well if I buy the shortblock, I could run the 13-14psi and have 550whp no prob. So it would be money spent. I'm just gonna wait to see what Sam posts __________________ NewYorkJon34's Ultimate Z Build

06-14-2011, 11:15 AM	#77 (permalink)
Nitex Track Member Join Date: Jan 2010 Location: Seattle Posts: 848 Drives: '13 GTI Stage 2 UNI Rep Power: 16	4.5L stroker would be intense.. Did someone post 400/300 pre FI? __________________ 2013 Drivers ED GTI \| Stage 2 Unitronic

10-20-2011, 05:11 PM	#82 (permalink)
theDreamer A True Z Fanatic Join Date: Feb 2009 Location: Texas Posts: 30,879 Drives: 370z Rep Power: 4210	There is no real answer to what PSI/HP/TQ the block can handle so far, most of the blown blocks have been other circumstances and so far people running 500whp have been doing alright (more time is needed). 7AT upgrade is being finalized by GTM, they have shown some pieces but not much yet on pricing or other details. Will you need it? Probably not initially, something you can prep for in the future. __________________ theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN theDreamer's Silvia // URAS // GREDDY Houston Zs // Facebook // Twitter // Instagram

10-21-2011, 11:52 AM	#84 (permalink)
Nixlimited A True Z Fanatic Join Date: Aug 2009 Location: San Diego Posts: 1,235 Drives: 15 GT-R / 11 Prius Rep Power: 26	Note that asking what PSI a block can handle is inherently an unanswerable question since it all depends on the setup. For example, a small turbo may flow X CFM of air at 20 psi while I larger turbo flows Y CFM of air at 20 psi, and Y > X. I think it's easier to talk in how much HP or TQ a block can handle as measured on a dyno. But even then you have tons of variation between dynos. __________________ Car Sold! Pleasure being a part of the Z community. New ride: 2015 GT-R - 647 WHP / 641 WTQ (e85) & 543 WHP / 519 WTQ (91)

11-13-2011, 11:07 AM	#89 (permalink)
JB-370z A True Z Fanatic Join Date: Apr 2009 Location: Houston, Tx Posts: 1,859 Drives: Stage 2 Twin Turbos Rep Power: 19	Sam says that us folks with stage 2 turbos might be able to see 650-700whp. This has to do with the compression ratio as well. So my plan is to try and get to that 700whp mark. I was hoping to get a clear idea of what needs to be done. How much more tuning is involved with changing the compression? Can I use the stock ECU? etc.... __________________ ll Baker Tuning ll GTM ll Powerhouse Amuse ll HKS ll Up-Rev ll iForged ll AP Racing ll Pioneer ll SPL ll Bride ll Top Secret ll OS Giken ll GTM Stage 2 Twin Turboed 370z (First in Texas, Thanks To Baker Tuning)

10-21-2011, 09:07 PM	#87 (permalink)
GambitX Base Member Join Date: Jul 2011 Location: Tampa FL Posts: 48 Drives: G37 TT Rep Power: 14	If your friends with UPREV on FB, you will see they are now doing testing on the tolerences of the VQ motor right now

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