Forged Internals g37x 2009

[Tyetti7]

Are the forged internals the same in a g37x as a gtr... i want to know how easy it is to turbo my g37x.. thanks

[joe603]

Because of the dual throttle bodies, FI will be interesting to do on the G37. Stillen actually developed an intake for their supercharger application:

http://blog.stillen.com/2010/01/370z-g3 ... -detailed/

[suby01]

very easy. no internal work needed at all. TT setup brings you to over 400 whp. installed price aprox 15k. enjoy.

http://www.gtmotorsports.com/index.php

[vulcanrush]

i don't think it's fair to expect a 33k+ car to have the same internals as a 90k+ car.

two, i don't think the internals on a g37 are forged, esp the pistons, please correct me if i'm wrong.

three, i wouldn't just throw on a turbo/supercharger pack and expect 400whp. i would try to get lower-compression pistons, maybe 8.5:1 instead of 10.5:1.

i'm more conservative than most, because i don't wanna destroy the engine.

[joe603]

With the G37 Stillen SC kit, they are expecting 500+ HP without any engine mods. But you're right the pistons are not forged.

Here's what Infiniti says:

3.7-liter (3,696cc) V6, aluminum-alloy block and heads. Resin-coated pistons

[suby01]

i don't think it's fair to expect a 33k+ car to have the same internals as a 90k+ car.

two, i don't think the internals on a g37 are forged, esp the pistons, please correct me if i'm wrong.

three, i wouldn't just throw on a turbo/supercharger pack and expect 400whp. i would try to get lower-compression pistons, maybe 8.5:1 instead of 10.5:1.

i'm more conservative than most, because i don't wanna destroy the engine.

just like joe said. stillen got 500hp with just a supercharger. no intake exhaust. so while you wouldn't. if i had the money i definitely would.

[vulcanrush]

this is from eric hsu over at cosworth:

True Horsepower
What kind of power can the stock internals of an '03 Nissan 350Z engine handle? I'm looking into forced induction and would like to keep the stock internals, if possible. Is there a turbo kit you would prefer, and can you recommend a good tuner near Chicago?
-Chad Sweitzer
Shannon, IL

There are two types of stock internal horsepower ratings. One is based in reality and the other is what you see in some dumb-a** post on the forums. The lamest is when a forum member posts a thread with some outrageous number using stock internals, titled: "652whp/630tq @ 22psi-highest horsepower red '06 350z stock-internal VQ35DE on C16 fuel east of the Mississippi, south of the Mason Dixon line, in the 402 area code." Reliable, usable power limits are always lower than the one or two dyno passes a car can be tuned to put down before blowing up. A stock VQ35 is good for a max of about 400 hp at the wheels when tuned properly, if you want to be able to drive it daily or beat the crap out of it at the track. Any more than 400 whp and you stand a chance of breaking parts. Shops can build "one-run wonders" to make 600+ stock-block whp on race fuel, but it's just plain stupid to assume that a connecting rod won't exit the side of its block if you drive it like that at the track. I'm not too familiar with shops in the Chicago area, but Sound Performance comes to mind-their 1,280whp 350Z runs 9s on a stock six-speed transmission.

different engine, similar question, right?

500hp is a lot to ask of stock internals. i'm currently rebuilding a vg30dett, which imo, is much stronger than a vq35de or vq37vhr (iron block vs aluminum block) and i'll probably push 400, nothing too crazy.

[terrycs]

Are the forged internals the same in a g37x as a gtr... i want to know how easy it is to turbo my g37x.. thanks

To answer your question, it is easy to add FI to your car keeping the stock internals. Higher compression motor just means lower manifold pressures are needed. With a boost controller, you can set up muliple boost levels. Wastegates for current HR / VHR kits are usually set to 5-6 psi boost which is where I leave mine set 99% of the time. Yes, I still have stock internals and have about 25k boosted miles.

It's no secret, the key to durability is how you drive your car. Daily drag racing and boosting it from light to light will obviously be harder on the drivetrain than occasional highway pulls with or without forced induction.

[joe603]

500hp is a lot to ask of stock internals. i'm currently rebuilding a vg30dett, which imo, is much stronger than a vq35de or vq37vhr (iron block vs aluminum block) and i'll probably push 400, nothing too crazy.

The Stillen kit will produce 515 reliable HP...on a G37.

http://blog.stillen.com/2010/03/stillen ... initi-g37/

[terrycs]

500hp is a lot to ask of stock internals. i'm currently rebuilding a vg30dett, which imo, is much stronger than a vq35de or vq37vhr (iron block vs aluminum block) and i'll probably push 400, nothing too crazy.

The Stillen kit will produce 515 reliable HP...on a G37.

http://blog.stillen.com/2010/03/stillen ... initi-g37/

I would never say that adding FI to factory N/A car is "reliable". It will obviously be less reliable than stock. The press release also said 438 WHp which is what is actually measured.