I gotta 5.3 and I'm putting an '02 LS6 cam and I'm most likely gonna be the guinnea pig for a Kenne Bell. I was wondering if these heads will help me, and if so how much????

LS1 Stage 2 heads
841 casting numbers
2.02 intake
1.60 exhaust
Less than 1000 miles.
Perfect condition.

 

How much have the heads been milled? I don't much about superchargers but I do know that lower compression ratio is a plus. That Kenne Bell should be able to take full advantage of those valves. One thing though, you might want to do a search, I thought I read somewhere that the LS6 cam doesn't make good for a FI setup.

 

those are good heads but i believe ls1-ls6 heads are goung to raise your compression. you can use them and adjust for that a couple ways. dish pistons,chamber size of the head, and also gaskets. so if those are not milled and the price was right then you could have the chambers made bigger. over all good head but not the best for FI setup like silent said. but they can be made to work.

 

LS1/LS6 heads are both larger cc combustion chambers than the 5.3L heads. Therefore they will drop your compression ratio. This is good for boost because you can now pump in more air to get the static compression back to where it was befor the compression drop.

The larger valves will help get more air into the cylinders per valve cycle because they are larger. This creates less of a back up of air in the intake manifold. The more psi you see on a gauge is the amount of air being compressed into the intake manifold. When you compress air it gets hot = easier to see detonation with hor air. But those heads will allow for air to flow through the engine and not be building up so much in the manifold. Any boost drop you see, you can spin the SC faster to make up for that lost boost and still be running your previous boost amount but be flowing more cfms into the motor. Airflow (cfms coming out of you blower/turbo) make horse power not a higher psi boost number.
Ryan

 

I believe the '02 LS6 cam is a good boost cam. I run it now (advanced 4 degrees from TDC). There is something interesting that happens around my shift though (5700rpm). Normally the boost will increase as the rpms increase i.e. it is spinning the blower faster. However, on my gauge we have seen the boost number begin to drop from 5400-5700shift. This is because the cam is reaching its efficiency range (which may be alittle too high in the rpm band for FI) but it is still a good FI cam. You may want to get something on a 115lsa.