Ok I'm helping a buddy of mine swap motors n his camaro and he has a set of patriot heads on the motor hes instlling I'm tryin to find out if these heads well work for my truck i've searched on line and found only two diff heads there from summit, the the diff is the one flow more but not worried bout that its the chamber its either a 59cc or 63cc i want to up the compression the heads are on the motor haven't takin them off yet but how can i find out which heads they are there was a # on the head but couldn't get anything from those numbers. Help any body

 

what motor is in ur truck now?

 

its a 5.3

 

If you can not read a number it is going to be hard to determine what heads and specs they are, unless you get into measuring valves ect.. Stock ls1 came with a 66cc chamber, as the ls6 came with a 64cc chamber.. If it is 59 cc, that will def up compression as that is smaller then any head ever released to the trucks..

 

the motor is in another camaro so the only # i could get was 6504 that was on the front of the head

 

if that helps any

 

he had the all the paper work of perform mod to the motor but he lost the one that had the heads on it he just knows he got it from summit its a 00 camaro

 

i'm goin to pull the heads today or tomorrow how can i figure out what size the chamer is? anybody??

 

You'll need a piece of clear plexi-glass with a hole drilled in it, rubbing alcohol, machinist's dye is helpful, grease and a 100cc burette. With the head on the bench, install a spark plug into the combustion chamber to be measured. Remove or compress the valves from that chamber and coat the seats with grease (this is to keep the rubbing alcohol from leaking out). Re-install valves. Put a light coat of grease around the edges of the combustion chamber. Take the clear plexi-glass and place and press over the combustion chamber, with the hole in the middle. Fill the burette with rubbing alcohol, to a number you can read, be it 90cc, 100cc, whatever, just make sure that it's engough to fill the combution chamber and have some left over. Some form of dye is helpful to make it easier to read. Fill from the burette to the hole in the plexi-glass, being sure not to spill a drop. when the combustion chamber is completely filled so that there is no air bubbles, observe how much alcohol is left in the burette, and subtract If you filled the burette to 100cc, and now have 40cc left, you have 60cc combustion chambers

 

Yah pretty much dead nutz here.. Great info William