30th6

iTrader: (6)

I have a 08 lmg 5.3, it has 799 heads stock with flattop pistons. I'm doing a dod delete and ls2 cam, I was wondering while I had the heads off what kind of power would milling the heads to bump the compression up to 10.5 and how much to run stock gaskets. It's going in a rock crawler so I don't want to change cams I need low end torque and hp.

KW Baraka

iTrader: (7)

Depends......what's your compression ratio now?

KW

30th6

iTrader: (6)

I think is 9.9,its a 08 5.3 flex fuel dod out of a 1500 silverado

pdxmotorhead

Has the engine been tuned or still running stock ECU? I'd plan on a tune... And you'll have to shop to find someone who does well with low RPM torque instead of red-line power,, Its hard to find a guy who can shift his process to a crawler engine vs a drag or race oriented point of view.. And knows how to get the power on just off idle..

30th6

iTrader: (6)

I'm still working on it. Just was asking while I had it apart on the engine stand if it was worth it to deck the heads. I'm gonna get a tune .

big hammer

.5 of a point maybe 10 hp

30th6

iTrader: (6)

it's not worth 10 hp to me thanks

30th6

iTrader: (6)

What kind of power should I be looking at with this setup?

JoeNova

I would go aftermarket cam LONG before I would go LS2.

30th6

iTrader: (6)

I was looking at a 212/218 . But for the price I went a little smaller for the ls2. Again I'm not looking for all out hp. I gotta spin 400lbs of 42 in tires on demand. And a huge stall is a problem offroad.

JoeNova

LS2 cam doesn't even pick up anything over a stock 5.3 cam until 4500+ RPM.
You could get a cam with a nice low LSA that would be a monster for torque.

30th6

iTrader: (6)

what would you recommend?

farmington

iTrader: (14)

you might want to rethink getting the heads cut. the gain would be exactly what you are looking for. bottom end torque.

AnotherWs6

iTrader: (17)

Agreed. Compression increase is the best way to gain power everywhere, instantly.

30th6

iTrader: (6)

How much power would milling the heads give me?
if it's only 10 or so I don't think it would be worth it.

farmington

iTrader: (14)

torque increase, better throttle response.

BudRacing

iTrader: (3)

That all depends where in the curve the 10hp is. A bump in compression will certainly be noticeable down low. That, paired with a mild cam like the BTR stage 1 truck cam could make a nice difference from down low throughout most of the usable RPM range.

https://www.briantooleyracing.com/tr...age-i-cam.html

G Atsma

Wouldn't a compression bump tend to fatten the curve from idle all the way up?

big hammer

Great power bump and reliable as hell

https://ls1tech.com/forums/dynamomet...hp-22rwtq.html

big hammer

Yes it will. Across the board