Around 20 whp better at any given pulley size.... That's what Intense Racing dyno'd it at with an M62 vs. H62 comparrison. I own the H62 Intense Racing was selling years ago in the thread below (note, I did not purchase it from them though).

Here's the old thread: https://www.cobaltss.net/forums/show...ototype+blower

Do I have graphs to post.... No, but 2 falls ago my car dyno'd 282 whp while in H.O.M. running the GMR S3 hardware.

No M62 car has done that with the GMR S3 setup. The highest I know of is Micro, who runs a similar setup to mine minus the H62. He dyno'd nearly 260 whp.

One comparison I do have is via airflow.

When I ran the M62 my car flowed around 31.74 lbs/min w/ the 76mm pulley.

With the H62 my car now flows around 36-37.14 lbs/min w/ the 76mm pulley.

^This was tested the same day before & after install of the H62.

It flows a decent amount more than a stock M62, but no where close to the TVS.

I do know of a member who made 308 whp with one of the other H62's that were floating around, and the Time Attack SS/SC made 320 whp (off spray) with the H62 (built motor of course).

With cams, race gas, & my other mods I already have, I should have no problem getting near 300 whp. We shall see next year....

 

aaaaaaaaaaaaaakkkkkkkkkkkkkkkkk...................

I'm SO confused!

so, what you're saying is --a guy can get a copy of the GM S2 tune on a regular pcm, and then it can be edited?

I can't buy a real GM S2 pcm, unlock it, edit the tune for TVS-E85-80's, (or whatever, just using that as an example) and then run a 50 dry shot.

 

GMS3*

Correct.

Vince at Trifecta has the genuine GMS3 tune. He can upload it onto your existing PCM. He has options u can select like leaving the tune "unlocked". What this does is allows u to custom tune the GMS3 OS to your mods if u so choose. Vince can also tweak it for u as well.

If u were purchase a genuine GMS3 PCM from Crate Engine Depot, you would not be able to alter the tune, because it is locked from GM.

 

oops! yes, stage 3, not stage 2.

thanks again, I understand now.

 

last i hurd..trifecta dosnt offer the unlocked s3 file any more..

 

Hmm.... that's news to me.

Thanks for the update.

I'm sure Vince can still custom tune you using the GMS3 OS though. I guess he just stopped releasing the HPT unlocked version.

Ur welcome man.