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

Mr.Squeeze · 05-24-2011, 11:29 PM

Quote:

Originally Posted by JB-370z

I dont think yall understand that these bad boys have been out for more than a year and Sam is the only guy in the world with pistons and rods for a 370z. Got to love how GTM is mostly exclusive to Nissan and does not set his focus on a ton of different manufactures of vehicle. This keeps us 370/nissan guys with a plethora of fresh product. Some companies want to sell it all and leaves the choices limited. Im pretty sure if you could convince Sam that adding a shark fin and laser beam to roof of the Z made nice power gains, he would produce them for us all

Carrillo makes rods so does eagle ,and K1

Weisco makes pistons 9:1 off the shelf or you can order a custom set.

Also brian crower makes a stroker kit for the VHR.

oleg · 05-25-2011, 07:24 AM

Wouldn't this kit also make the engine more reliable if not going the turbo route since the internals will be stronger and is it actually possible to be making those numbers on an n/a v6? I think a Porsche had a v6 engine that was running n/a and was making those numbers but I'm not sure.

JB-370z · 05-25-2011, 10:36 AM

Quote:

Originally Posted by Mr.Squeeze

Carrillo makes rods so does eagle ,and K1

Weisco makes pistons 9:1 off the shelf or you can order a custom set.

Also brian crower makes a stroker kit for the VHR.

Did not know that thanks.

9:1 ? not sure if that is a good match for our engine. You might have octane issues if you are looking for high hp numbers, with such a low compression.

Quote:

Originally Posted by Brazilbro

I liked the same thing about AMS when I had an EVO. I like it when a company focuses on one thing and does it right!

I am with you. Also do you plan on building your engine and ripping up the boost?

Mr.Squeeze · 05-25-2011, 11:58 AM

Quote:

Originally Posted by JB-370z

Did not know that thanks.

9:1 ? not sure if that is a good match for our engine. You might have octane issues if you are looking for high hp numbers, with such a low compression.

I am with you. Also do you plan on building your engine and ripping up the boost?

9:1 is perfect if your looking to run a lot of boost with a turbo set up. For a supercharged car I would go higher,because of pulley limitations. There wont be octane issues with with 9:1 low compression, never heard of that one.

NewYorkJon34 · 05-25-2011, 01:42 PM

Sam recommended to me 10:1, just saying

Reality · 05-25-2011, 02:57 PM

Quote:

Originally Posted by Mr.Squeeze

9:1 is perfect if your looking to run a lot of boost with a turbo set up. For a supercharged car I would go higher,because of pulley limitations. There wont octane issues with with 9:1 low compression, never heard of that one.

Mr.Squeeze · 05-25-2011, 03:23 PM

Quote:

Originally Posted by NewYorkJon34

Sam recommended to me 10:1, just saying

Not a bad choice at all for a superchared build

JB-370z · 05-25-2011, 08:21 PM

Quote:

Originally Posted by Mr.Squeeze

9:1 is perfect if your looking to run a lot of boost with a turbo set up. For a supercharged car I would go higher,because of pulley limitations. There wont be octane issues with with 9:1 low compression, never heard of that one.

I did say "Higher hp numbers" should have been more specific I apologize

. There can be fuel challenges with both high and low compression when trying to gain “High hp numbers” or levels. Finding the sweet spot would be ideal for any setup.
It goes both ways. You dont want to go too low or high in my book. This is because the lower you go the more boost you need to throw at it. More boost means higher temps and higher temps means greater chance of detonation. Same thing with high compression. Higher compression naturally runs hotter than lower compression. As you turn up the boost on higher compression you will be adding more heat as well which means higher chance of detonation. High boost low compression or Low boost High compression is fine but fuel issues are known to come up with wanting to gain high hp levels. What I am trying to say is. 10:1 seems like a better choice than 9:1 just cause you need less boost to make the same power and turbo's will spool quicker with the 10:1 application vs 9:1. I dont know how this would work with superchargers though. The whole point of lowering the compression would be to create less heat which makes a less chance for detonation which makes it easer to tune and give a little forgiveness when tuning if the tune is a tad off. Which means safer to most people.

Also, it seems like 10:1 works out perfect for the GT-R.

Mr.Squeeze · 05-25-2011, 11:37 PM

Quote:

Originally Posted by JB-370z

I did say "Higher hp numbers" should have been more specific I apologize

. There can be fuel challenges with both high and low compression when trying to gain “High hp numbers” or levels. Finding the sweet spot would be ideal for any setup.
It goes both ways. You dont want to go too low or high in my book. This is because the lower you go the more boost you need to throw at it. More boost means higher temps and higher temps means greater chance of detonation. Same thing with high compression. Higher compression naturally runs hotter than lower compression. As you turn up the boost on higher compression you will be adding more heat as well which means higher chance of detonation. High boost low compression or Low boost High compression is fine but fuel issues are known to come up with wanting to gain high hp levels. What I am trying to say is. 10:1 seems like a better choice than 9:1 just cause you need less boost to make the same power and turbo's will spool quicker with the 10:1 application vs 9:1. I dont know how this would work with superchargers though. The whole point of lowering the compression would be to create less heat which makes a less chance for detonation which makes it easer to tune and give a little forgiveness when tuning if the tune is a tad off. Which means safer to most people.

Also, it seems like 10:1 works out perfect for the GT-R.

The GTR has a compression of 9:0:1 not 10:1. With that being said 9:1 is not considered to low for a turbo car. Yes you will need more boost to make the same power that you would on 11:1.I will use stage 2 GTM turbos as an example,with those turbos with 9:1 you will not have octane issue's before those turbos max out.I do agree with you that they will spool slower the are small turbos ,and I doubt you will notice it.With a supercharged car you don't want to go to low because boost is limited by pulley's/ Blower size.

In the end its all about a person's power level goal I have yet to see a build 3.7,or here of anyone that has done it.Now with the DE motor's there are plenty of people that run lower than 9:1,they make plenty of power without octane issue's.

NewYorkJon34 · 05-25-2011, 11:45 PM

I'm going to be actually building mine so you won't have to wait long

My goal is 550+whp, -I will reach my goal-

Mr.Squeeze · 05-25-2011, 11:50 PM

Quote:

Originally Posted by NewYorkJon34

I'm going to be actually building mine so you won't have to wait long

My goal is 550+whp, -I will reach my goal-

Lol good to know I think I will have you beat there on the build though.

NewYorkJon34 · 05-26-2011, 12:06 AM

Quote:

Originally Posted by Mr.Squeeze

Lol good to know I think I will have you beat there on the build though.

Its ok, either way we will both be enjoying our cars

JB-370z · 05-26-2011, 12:09 AM

Quote:

Originally Posted by NewYorkJon34

I'm going to be actually building mine so you won't have to wait long

My goal is 550+whp, -I will reach my goal-

I can't wait to hear more. We have a car @ Baker Tuning currently getting the motor built from GTM so maybe results soon.

Did not know the GTR was 9:1 thanks. Should have just googled it.

Mr.Squeeze · 05-26-2011, 12:14 AM

Quote:

Originally Posted by NewYorkJon34

Its ok, either way we will both be enjoying our cars

Yeah man we can have a foot race to 550whp

NewYorkJon34 · 05-26-2011, 12:21 AM

For sure, I'll be keeping updates in my Journal. I'm going to take my time & buy EVERYTHING I need, then it's install time

05-25-2011, 01:42 PM	#35 (permalink)
NewYorkJon34 A True Z Fanatic Join Date: Jun 2009 Location: Naples, Florida Posts: 3,041 Drives: 09 Fairlady Z Rep Power: 1065	Sam recommended to me 10:1, just saying __________________ NewYorkJon34's Ultimate Z Build

05-25-2011, 11:45 PM	#40 (permalink)
NewYorkJon34 A True Z Fanatic Join Date: Jun 2009 Location: Naples, Florida Posts: 3,041 Drives: 09 Fairlady Z Rep Power: 1065	I'm going to be actually building mine so you won't have to wait long My goal is 550+whp, -I will reach my goal- __________________ NewYorkJon34's Ultimate Z Build

05-26-2011, 12:21 AM	#45 (permalink)
NewYorkJon34 A True Z Fanatic Join Date: Jun 2009 Location: Naples, Florida Posts: 3,041 Drives: 09 Fairlady Z Rep Power: 1065	For sure, I'll be keeping updates in my Journal. I'm going to take my time & buy EVERYTHING I need, then it's install time __________________ NewYorkJon34's Ultimate Z Build

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05-25-2011, 07:24 AM	#32 (permalink)
oleg Enthusiast Member Join Date: Dec 2010 Location: Illinois Posts: 321 Drives: 2011 370z 6mt sp Rep Power: 14	Wouldn't this kit also make the engine more reliable if not going the turbo route since the internals will be stronger and is it actually possible to be making those numbers on an n/a v6? I think a Porsche had a v6 engine that was running n/a and was making those numbers but I'm not sure.