Advantages of 5.3 heads?
Advantages of 5.3 heads? I've bought a complete 5.3 from a 98 silverado. It has 2500 miles on it and a cracked ring. What are the benifets of using these over the LS1 heads that are already on my SS. I plan on getting them ported and polished and I'm going to run an X1 cam.
advantage is there smaller combustion chamber whichs yields a higher compression 10:7 if i recall. the flow the same as ls1 heads. you'll want the 5.3's outfitted with bigger valves though since they come stock with 1.89 on the intake and i forgot the exhuast.
Originally Posted by Mills
A 1998 silverado had a 5.3 in it?
You can buy stock 5.3's for 300.00 or less on ebay. The smaller valve size would really limit the engine. If you dont plan on porting and increasing the valve size then forget using them. The extra compression would never make up for the crappy intake flow.
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Originally Posted by THEMADTYPH00N
I was told it was a 98 but your right I dont think the silverado got the 5.3 till 99. To big deal though. Anyway now that I've got these where's a good place to send them off to get bigger valves and be ported and polished.
