View Poll Results: Which heads would net me more power?
Stock 5.3L 862 Heads (Lightly ported)
8
53.33%
LS1 Heads (Lightly ported)
7
46.67%
Voters: 15. You may not vote on this poll
Which heads would net me more power?
12-13-2009, 05:22 PM
#1
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Which heads would net me more power? Hey guys, I'm in need of some help here. I'm trying to decide which heads would be better for my application. I've got a 5.3L LM7 engine (stock 862 heads) and I'll be upgrading to flat-top pistons for a bump in compression.
I'm trying to decide whether I should upgrade to the LS1 heads for their bigger intake valves or keep my 862 heads for their smaller chambers and higher compression ratio.
Both heads would be lighty ported...so what do you think?
Stock 862 Heads: 61.15 cc
Valve Diameter Intake 1.89"
Valve Diameter Exhaust 1.55"
LS1 Heads: 66.67 cc
Valve Diameter Intake 2.00"
Valve Diameter Exhaust 1.55"
Assume I would be using a TR224 cam (224/224 .563/.563)
Thanks for your help!
P.S. I know something like the 5.3L Stage 2.5 heads would be best for me, but I'm not looking to spend that much money.
I'm trying to decide whether I should upgrade to the LS1 heads for their bigger intake valves or keep my 862 heads for their smaller chambers and higher compression ratio.
Both heads would be lighty ported...so what do you think?
Stock 862 Heads: 61.15 cc
Valve Diameter Intake 1.89"
Valve Diameter Exhaust 1.55"
LS1 Heads: 66.67 cc
Valve Diameter Intake 2.00"
Valve Diameter Exhaust 1.55"
Assume I would be using a TR224 cam (224/224 .563/.563)
Thanks for your help!
P.S. I know something like the 5.3L Stage 2.5 heads would be best for me, but I'm not looking to spend that much money.
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12-14-2009, 02:56 PM
#10
Neither heads are my favorite if your going to purchase do 243s.
Now if your intent in doing 241 what you can do to help out your 241s would be get the LS6 valves. Have Advance Induction do the work to them they very good at what they do or Lloyd Elliot he is a genius with 241 heads. Keep the stock rockers and if your going after market go with Yella Terra.
My personal experience though you are wasting your time with 241 heads.
Now if your intent in doing 241 what you can do to help out your 241s would be get the LS6 valves. Have Advance Induction do the work to them they very good at what they do or Lloyd Elliot he is a genius with 241 heads. Keep the stock rockers and if your going after market go with Yella Terra.
My personal experience though you are wasting your time with 241 heads.
12-14-2009, 03:13 PM
#11
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Now if your intent in doing 241 what you can do to help out your 241s would be get the LS6 valves. Have Advance Induction do the work to them they very good at what they do or Lloyd Elliot he is a genius with 241 heads. Keep the stock rockers and if your going after market go with Yella Terra.
My personal experience though you are wasting your time with 241 heads.
My personal experience though you are wasting your time with 241 heads.
