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

Nixlimited · 05-14-2011, 09:15 AM

Quote:

Originally Posted by GUTCH

Disclaimer: Noob posting alert.

In relation to the GTM Stage 5 VHR/HR Stroker Shortblock 4.2L or 4.5L engine kit:

Would this be suitable as a daily driver?

With this installed, is forced induction still required to achieve the kind of power and torque that the TT and SC kits are producing?

I *think* the stroker kits are designed to have lower compression ratio with FI in mind. Thus, I don't think you would make big power going all motor with one of those kits without changing some things.

roplusbee · 05-14-2011, 09:55 AM

Quote:

Originally Posted by Nixlimited

I *think* the stroker kits are designed to have lower compression ratio with FI in mind. Thus, I don't think you would make big power going all motor with one of those kits without changing some things.

That sounds like something that is worthwild, but I hope someone from GTM chimes in to clarify. I have been debating on building the bottem end during my install, but I am not looking to push 700 HP at any point in the Z. I am looking to make it as reliable as possible while giving it more guts. Decisions..................

jnaut · 05-14-2011, 08:47 PM

Quote:

Originally Posted by Nixlimited

I *think* the stroker kits are designed to have lower compression ratio with FI in mind. Thus, I don't think you would make big power going all motor with one of those kits without changing some things.

No not at all, as If your were to build an all motor @ like 12 to 1 cr on a 4.5l i feel you would be around 400 whp and prolly 300 tq. Which it a very very fast car. Yes larger injectors will be need as with exhust.

This stroker kit is on my grocery list...

FL 4Motion · 05-14-2011, 09:40 PM

Quote:

Originally Posted by jnaut

No not at all, as If your were to build an all motor @ like 12 to 1 cr on a 4.5l i feel you would be around 400 whp and prolly 300 tq. Which it a very very fast car. Yes larger injectors will be need as with exhust.

This stroker kit is on my grocery list...

Sh!t, that sounds soo awesome. I know an N/A stroker Z motor isn't the "best" bang for your buck for making power, but there's just something really cool about staying n/a and doing something that radical.

FL 4Motion · 05-14-2011, 09:41 PM

follow up ? for jnaut, would 12 to 1 cr be run on pump gas 93 octane?

jnaut · 05-14-2011, 10:22 PM

Quote:

Originally Posted by FL 4Motion

follow up ? for jnaut, would 12 to 1 cr be run on pump gas 93 octane?

Yes, I feel it would be with the dynamic timing in our ecu. Yes u r correct... being able to say "yea its n/a, making that power." What else is awesome, if u have a warranty issue as lone as its not the engine itself, they would never know. U can't see in the engine hahaha score for the consumer

FL 4Motion · 05-14-2011, 10:46 PM

Quote:

Originally Posted by jnaut

Yes, I feel it would be with the dynamic timing in our ecu. Yes u r correct... being able to say "yea its n/a, waking that power." What else is awesome if u have a warranty issue as lone as it not the engine itself, they would never know. U can't see in the engine hahaha score for the consumer

Shoot, if 12 to 1 is acheivable and safe w/pump gas, a 4.5l stoker that could rev safely to 8K would be sick! Honestly, if it could for sure make 400whp or so with 300wtq, I think I'd def go this route over a TT setup. It'd be perfect for track days since the excessive heat generated by a TT setup wouldn't be an issue.

jnaut · 05-15-2011, 12:12 PM

Quote:

Originally Posted by FL 4Motion

Shoot, if 12 to 1 is acheivable and safe w/pump gas, a 4.5l stoker that could rev safely to 8K would be sick! Honestly, if it could for sure make 400whp or so with 300wtq, I think I'd def go this route over a TT setup. It'd be perfect for track days since the excessive heat generated by a TT setup wouldn't be an issue.

Yes, i totally agree for track set-up. Less chance of issues, plus exiting a corner is more consistent. I keep you in the loop, as I have a customer contemplating the idea of a stroker kit in his 370z.

Nismo221 · 05-14-2011, 09:50 PM

Will have to remember this when I get my GTM 4 stage next year

05-14-2011, 09:50 PM	#9 (permalink)
Nismo221 Enthusiast Member Join Date: Sep 2010 Location: Decatur, Alabama Age: 37 Posts: 489 Drives: 2010 370z Nismo Rep Power: 15	Will have to remember this when I get my GTM 4 stage next year __________________ Stillen Gen 3, Motordyne M370 Intake Manifold, 25 row oil cooler, Z1 test pipes, Greddy Ti-C 70mm dual exhaust, 15mm front/20mm rear spacers, RE-11's, V1 detector, LED interior lights, LED tag lights, Password JDM CF engine and radiator cooling covers.

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05-14-2011, 09:41 PM	#5 (permalink)
FL 4Motion A True Z Fanatic Join Date: Feb 2009 Location: FL Posts: 4,776 Drives: Baby Shark Rep Power: 701616	follow up ? for jnaut, would 12 to 1 cr be run on pump gas 93 octane?