I order'd my cam and was thinking while i'm in there should i get the heads done. what do i ask them to do with them other then p&p?

 

what gains should i except to?

 

first thing I would ask is if they ever done a set of gen 3 heads
I dont think you can go at them like older style sbc heads
not sure though
.bigger lighter valves
.mill


Oh and youre gonna like that cam

 

I would def get a valve job done while everything is off. My buddy and another guy I know just put LS1 heads with like a say a stage 3 job port polish,bigger valves,and etc on his 03 SS. Basiclly he did damn near all you can do to some heads. He already had a cam and all that done and since their isnt a 4wd dyno around they were guessing around 60+hp. I think he ended up spending like $1500-1700 and that was a decent deal with all that was done. When I do my cam pakage Im gonna do the head work as well and hope to see some major gains.

 

Did they get the heads done at Kittlers?

 

I don't think you can go very big on the valves with the stock 4.8/5.3 bore. But anything above the **** ant 1.89" should be an improvement. Does anyone know how big?

And no you can't "go at them" like a gen 1 sbc. From what I've seen and read, the comb. chambers should cleaned up as well as the bowls. But minimal work should be done to the runners.

 

Apparently you can sit a 2'' valve in there.

Got about .125,1/8, of an inch clearance with the intake valve and your looking at about .nothing with the exhaust. no need to go bigger on the exhaust valve.

I heard a 1.89 valve is good to 7100rpm anyways.

Personally, I'd have it done "good", or just do a bit of smoothing and polishing.

 

I think 2.00" is do-able too. That's what the LS1 heads have stock, and they work on 4.8/5.3's.

You might want to look into a 5 angle valve job too. I know one of the sponsors does this. I'm not sure of the benefit over the conventional 3 angle, but it might be worth it.

 

Hey twobit he didnt get the heads done at Kittlers. He gets his work done at B&M and Brad at B&M has a local machine guy that does his heads for him.

 

I've got the 5.3...sent my heads in and I went full stage 3. Intakes are at 2.02 and exhaust at 1.6. Yeh that's right...one single cooter hair...okay maaaaaybe two will fit between those valves. The great rumor is the 2.02 is too much for the 5.3 bore. Uhmm, debateable, however for the price I don't have to do anything with heads if I ever go up in bore size. I went with an advertiser on this site that I wouldn't recommend however. coughMore Performancecough. I have heard great things about Combination Motorsports.