5.3L block=Ls1 heads?

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Apr 22, 2008 | 03:00 PM

KJZ28

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From: New York

5.3L block=Ls1 heads?

I have a 5.3L block bored .030. I plan on putting a turbo on it with 8-9 pounds of boost. Would Aluminum LS1 heads be good for this? Someone is selling the heads and I was wondering if that combo would be decent. I do see a lot of you guys prefer 5.3L heads is there something wrong with the LS1 heads?

Apr 22, 2008 | 03:10 PM

RAGENZ28

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From: Port Hueneme, CA

I'd get the heads with the largest CC combustion chambers so you have lower compression and can run more boost on pump gas.

Apr 22, 2008 | 10:10 PM

KJZ28

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From: New York

So The LS1 heads would be good then? Because they are bigger than the 5.3L's...

Thanks RagenZ28 that is good info for me to remember.

Apr 23, 2008 | 08:10 AM

bigfatls6

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From: Houston Tx

The reason most go with the 5.3 heads is the boost in compression over a ls1 head. The runners are also a little smaller on the 5.3 heads.

Apr 23, 2008 | 10:07 AM

KJZ28

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From: New York

But under boost application it would be good for me to go with the LS1 head?

I ask becasue I can get a set of Aluminum LS1 heads heads for $250. Is that a good price?

Apr 23, 2008 | 10:38 AM

SOMbitch

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Quote:

Originally Posted by KJZ28

But under boost application it would be good for me to go with the LS1 head?

I ask becasue I can get a set of Aluminum LS1 heads heads for $250. Is that a good price?

I have seen them go for $50. My stock 803 castings (73K) are coming off in the next 2-3 weeks and I'll sell'em to you for $75 shipped. Perfect as far as I know.

You want to lower compression to decrease detonation so yes the bigger chamber LS1 head is a better choice.

Apr 23, 2008 | 10:51 AM

LS6_Silverado

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From: Gainesville, FL

Yea, i would use LS1 heads(241,803) if i was on a budget there about 67cc's If you want heads that will flow really good get some 6.0L heads(317) there 72cc, but flow like LS6 Heads(243). I dont know how much that will lower you compression... but just something to think about.

I have a pair of 6.0L heads for 200$ + shipping pm me if intrested...

Thanks Brandon

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Apr 23, 2008 | 11:13 AM

KJZ28

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From: New York

I sent a PM to Sombitch.

yes I am on a budget so getting stock parts is pretty much my only choice. I will probably run a Z06 cam also. The only thing I will get that is not stock is Pistons because of the bore.

This sounds crazy but I am hoping to score a free crank and rods because I know people that toss 5.3L parts like garbage. I dont mind using stock stuff, most of it is strong enough for serious power.

Last edited by KJZ28; Apr 23, 2008 at 11:20 AM.