5.3 Heads
Thread Starter
TECH Apprentice
iTrader: (4)
Joined: Jan 2007
Posts: 333
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From: Ontario, Canada
5.3 Heads Hey Everyone.
Ive got a set of 716 casting 5.3L w/ a bowl blend done on them.
Trying to determine if i should use these heads or go for some 241 castings.
Here's my motor spec's:
'99 LS1 shortblock
TR230 cam
Stainlessworks LT headers
LS6 intake
Im trying to make the car a good cruiser, make about 380+ Rwhp, and get some decent fuel milage.
Ive got the 5.3 heads now, is it worth selling them to go for 241 castings? I really dont want to buy any CNC heads, or LS6 heads.
If it means ill make 380rwhp w/ the 5.3l and 385 w/ the 241 heads i wont bother, but if its a 10+ rwhp difference, then i might as well
All help greatly appreciated.
Ive got a set of 716 casting 5.3L w/ a bowl blend done on them.
Trying to determine if i should use these heads or go for some 241 castings.
Here's my motor spec's:
'99 LS1 shortblock
TR230 cam
Stainlessworks LT headers
LS6 intake
Im trying to make the car a good cruiser, make about 380+ Rwhp, and get some decent fuel milage.
Ive got the 5.3 heads now, is it worth selling them to go for 241 castings? I really dont want to buy any CNC heads, or LS6 heads.
If it means ill make 380rwhp w/ the 5.3l and 385 w/ the 241 heads i wont bother, but if its a 10+ rwhp difference, then i might as well
All help greatly appreciated.
I would not expect to see more then 5-10hp from a swap like that. The nice thing about the 5.3l heads is they will have a smaller combustion chamber which will give you more compression yielding more torque.
I'd use the 5.3 heads, have them milled as much as you can get away with before having to flycut ($50), and cut for 2.00 / 1.55 valves ($24). That way you can use the stock valves out of a set of LS1 heads that you could probably get for $25-50 depending on your shopping ability. That'll let you work with what you have and work well on a budget.
Thread Starter
TECH Apprentice
iTrader: (4)
Joined: Jan 2007
Posts: 333
Likes: 0
From: Ontario, Canada
I'd use the 5.3 heads, have them milled as much as you can get away with before having to flycut ($50), and cut for 2.00 / 1.55 valves ($24). That way you can use the stock valves out of a set of LS1 heads that you could probably get for $25-50 depending on your shopping ability. That'll let you work with what you have and work well on a budget.
If its only going to cost me $100 to have the bigger valves in my 5.3L heads and i would have higher compression so more tq. then id definately be willing
