GTM Performance Engineering: VQ37VHR Engine Build 700HP Power Package
 

As this platform gets more mature, more and more people go with forced induction. So far, there has been a lot of success and we know that boost becomes very addictive very fast. Usually the natural progression is to build the engine and extract more power out of the car. Arguably, the VQ37VHR engine has proven itself to be a fairly reliable engine and even though we don't require an engine build when customers go FI, it is the natural thing to do when going for big power.

We intend to share this build thread to document what it takes to bring your force fed car to the next level. In this thread, we will be discussing and sharing what is involved in doing so and the supporting mods needed to make 700HP reliably. Stay tuned and enjoy the show.

The Patient

This vehicle we will be using as a case study is a little unique since the engine failed while 100% naturally aspirated with some mild breathing mods. The customer contacted us to do our 700hp package which involves building the engine and installing a twin turbo setup. By using this car as an example it shows that even with simple breathing mods you can still have catastrophic failure.

Equipment on the car at its arrival

Stillen Underdrive Pulley
Stillen Gen3 Intakes
Fast Intention HFC's
Fast Intentions Long Tube Headers
Custom 2.5" cat-back exhaust

GTM 700HP Power Package Components

GTM Stage 2 Twin Turbo Kit
GTM Stage 1 Short Block
GTM Stage 1 Cylinder Heads
Aeromotive 340lph Fuel Pump
Bosch EV14 760cc/min Injectors
GTM Test Pipes
GTM Upgraded MAF Sensors 1000HP
OS Giken Twin Disk Clutch
Heavy Duty Concentric Slave Cylinder for OS Giken
HKS EVC VI Electronic Boost Controller
GTM Custom Dyno Tune

Phase 1: Engine Removal

Since we are doing a twin turbo and an engine build at the same time, it makes good sense to drop the engine. After pulling the motor, we saw that it was completely unsalvageable. It is truly amazing how much damage that a catasrophic engine failure can cause. The block was completely destroyed, the starter was bent in half and the flywheel bolts were completely sheared off. Remember, this was an NA engine with breathing mods only.

Here are some pics of the aftermath.

Reserved for more information

Reserved for more pictures

Reserved for further progression

Reserved for final pics and write up

How does that happen ???? Wow !!

Subbed.

Was the car tuned? Maybe poor tuning led to its demise?

The car was never tuned. Customer just had straight bolt on and that is it .



Sam

Any ideas on what happened? That is a lot of damage to happen to an untuned car with just bolt-ons. Seems like there is some info missing.

wow crazy. hard to believe thats just bolt ons

X2, something does not add up!

But looking forward to waht you all are going to do to get it to the 700Hp level!

http://i313.photobucket.com/albums/l...E/P1170880.jpg
:icon18:

subd.

:eek:

Sub'd

subd

I think we all wanna know what really happened. Makes me extremely concerned about bolt ons on my z. Subd

Sam said in a post on page 1 bolt on's with out a tune. I can see this happening because it looks like he had just about every bolt on intake Long tubes exhaust.

This would lean the A/F out drive the car hard like this would be just asking for it.

Wow.. Amazing.. Sub'ed

+1 for more information on what led to engine failure in the first place. Just goes to show you that the couple hundred bucks for a tune is well worth it.

A lean AFR wouldn't cause that much damage. At worse, it would melt a few things. If the engine was pinging, it would have pulled timing until the pinging stopped. Unless he threw some 87 octane in there and went for a very very spirited run, but even then I don't think "that" much damage would be done.

I'm generally very very curious to hear what happened exactly.

Epic fail wow

They only way you will find out that info is if the owner post himself. Like you said he could have put some 87 in there and beat the piss out of it. Either way you can tell from the picture's detonation.

Maybe a 50 shot to lol

This car blew up.

I am very curious to see the results to have some idea where my car will fall.

Holy sh*t ! What the hell happened to the thing. Did he forget to up shift? Fascinating thread though, can't wait to see what you guys come up with.

From the pic of the back of the crank it looks like some bolts came out and the others sheared off, probably under a load at high RPM's causing the engine to instantly overspeed and blow before the rev limiter could catch it.

Would a mishift from 3rd to 2nd at redline do this much damage?

Looks like he had too much NOS!!!

I'll guess overreved/mishift also

should be a fund build though

:icon18: This is my guess.

Pulley... Sam did warn of this before, with the aftermarket ones having no dampener...

All I can say is OMG! Subbed as well............

Engine overspeed could potentially sling rods, but not bust pistons. Destruction like this just about had to be caused my preignition and/or severe detonation.

In for updates. Sad to see an NA car go out like that.

Believe me, there is no way the pulley did that. It would be instantly noticeable the instant you crank your car if your pulley is having detrimental effects. A 1/8in piece of rubber is not going to be the difference between a perfectly fine motor and a destroyed one.

This looks more like over revving with bad AFR's and detonating. Causing combustion too early in the stroke can and will cause catastrophic failure. Google and educate yourself.

At least the car isn't getting scrapped, GTM FTW... And the owners wallet.

Before this build thread goes any further I think everybody wants to know what really happened to this engine.

sent from my SAMSUNG SINGLE TURBO SGH1717

sub, yea

In for more details.

4 days and still no clue what happened? WE WANT DETAILS! I am still refusing to believe this happened just by driving an untuned car with bolt ons.