Engine Options...

[HUMMERcustoms.com/TAZ]

obzidian thanks on the info on the 6.2L heads. Woulk you go that route over ls6 heads and cam along with going 9:1 on compression. I have been told this may be to much and still run SC.

I have a friend that is like you been in the GM motor building a long time. He suggested a ls6 and cam with a 10:1 cr plus run the blower along with weth.inj for a better 1/4 miler or 0 to 60 seems to be the fun run around here right now. Butg, these guys are the ones mentioned at Specialty Perf. Products with new nice new piston design. This is later after the speed trap run.

He keeps saying keep in mind we are trying to move 7000lbs. off the line then he says it is all go and no slip if setup right. So hole shot is a huge advatange we all know. He mentioned like You had goingn to the 90mm throttle body.
I forgot with the SC on and not great tune I got my cousins new 05 vette in a 0 to 60 mostly because he was setting there spinning and burning tires. If i had been 0 to 100 maybe I lose.

Your thoughts

TAZ

[o2man98]

If you plan on running the L76 6.2 heads you must also convert to the L92 intake manifold to compensate for the changed angles of the mounting flanges. Do not worry these parts are cheap when you consider what you are getting. GM is really coming around to the performance parts sector.

Part Numbers
GM #12590771 2.16 intake valve
GM #12582719 1.59 exhaust valve
GM #12582714 L92 Bare Cylinder head
GM #12600936 Rocker arm pedestals
GM #12569167 Intake Rocker arm
GM #10214664 Exhaust Rocker arm
GM #12590124 L76 Style Intake manifold
GM #12499225 LS Series lifter kit(newly designed for high RPM LS7 usuage)

[obzidian]

yeup, i believe you can get all of this for the same price of a ported stage 3 ls6 head package. Kinda crazy!!!

Personally, i believe those heads are gonna revolutionize the heads wars. GM really steped up with putting these on the market and at the price they are selling them, well, i dont see why not.

great thing is that we have the manditory 4.00" bore that these heads require, since we are a lq9 6.0L motor. These things flow like C5R heads bcause they were designed after the C5R head program for the ls7.

So, would i, hell yeah!!

TAZ, i would probably want to be under the 10.1:1 CR range. My current car is at 8.7:1 and im shooting for 15-23psi. So a 9.1 cr is a good place to be to maintain a strong dcr under everyday lower boost levels... think about, running 20psi everyday is alot of strain and we need to dvelop a way to acheive peak power without increasing the psi levels if we want the motor to last. Not that it isn't but the more you are throwing at it, the higher teh frictional coifficient... more wear.

So, me.... well, i would start with a larger CI motor, than add a 122 eaton, f that is what you like... and see where that takes you... OR, a kenne bell. With our blocks, all we need is a larger piston, port work... to about 4.030" bore for a 408ci with a stroker crank of 4.00". (i believe or stock strock is 3.62ish) You can go bigger, and increase the bore, and get a 422ci... but a 408ci is fine. NOW, you will have the torque down low and stay flat acoss the powerband.

NOW, you add the boost. 9.1:1 is fine, and with a proper tune, i dont see why you shouldn't net 800hp with a combo like that. That is at the crank.

good luck!!

[HUMMERcustoms.com/TAZ]

The Magnuson comes with it's own intake manifold. I doubt the manifold will match up with the L76 heads, I think. I will have to stay with a head that matchs up. That is one reason a friend who is part of Specialty and Performance Products recommended the LS6 cam and heads.

I will not be running 20lbs. on normal setup. I will be at 7 or 8 lbs. but still have inj. and co2. I will be doing tunes for many different boost levels and the on board computer will have them all stored. That way i just stop kill motor leaving key on and pull tune off and load another. I will have several SC pulley's and we have learned to change them without taking belts off. It is not hard or anything it just let's you get it done in a few minutes on the spot if needed. The real high boost i will be trying to run will only be for the one mile speed trap run to set a top speed for a SUV in the open class so it will hopefully interest someone else to try and beat that and I come back the next rear and that guy is back just hoping to keep building interest and they will setup a SUV class.

You know just trying to get something started that is new. The organizers are very interested and see another group of people to get involved in the sport. They have trucks, sport cars, muscle cars, and allot of other divisions. So I'm not real sure what i'll do once i have done what the sponsors want. But, the way i am i can't leave anything alone. I can always run a boost setup that will help on top end more and change gears in rearend and transfer to get it out of a hole if i want to just run around to some strips freaking people out.

I just have to look at it one project at a time. I just want to have fun with it and meet my obligations then Dragon and i can feel it out as to what way we need to do to draw the most attention to MSA. Showing it is one but, taking to strip a few times a year so people are talking will be another.
So it will be interesting.

TAZ