Whats the benefit from running 5.3 heads on an ls1? I have a mild cam in my ls1, if I had 5.3 heads with large enough springs, there wouldn't be any issues. correct?

 

Chambers are smaller I believe, resulting in higher compression ratio.

 

higher compression ratio but they wont flow that great w/ the stock valve size . so what you'd pick up from the higher compression you'd lose due to crappy flow unless you did some porting and had bigger valves cut in. but yeah they'd work

 

I currently have stock 5.3 heads on my camaro with z06 springs. Read my sig.

 

higher compression if you swap the 5.3 for the ls1 head you wont see much of a power gane unless you fully ported with bigger valves.

 

I noticed an increase in low-mid range power and lost very little up top if any. The only reason I did this swap was cause I couldnt afford to buy any ls1 or ls6 heads at the time, only 6.0 or 5.3 and sometimes in alaska you have to take what is available. But I had floated the valves going down the quarter in my stock setup when I accidently shifted to 2nd on my 3-4 and messed up a head and some valves and my pistons and my pushrods. It wouldnt have been a rush deal but I wanted to make it out to the strip one last time before it closed for the year so i got some beehives and pushrods and threw on a set of 5.3's. I really have no complaints. I made the numbers i was looking for at the end of the year with little money invested.