5.3 head on LS1
09-21-2008, 10:33 PM
#1
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5.3 head on LS1 I have a set or 5.3l heads sitting in the garage and was wondering what i have to do to them before putting them on my car. 01 z28. I hear they raise compression a bit but don't flow as good. Also hear that they inc HP due to the compression bump. Would it hurt to put them on without putting bigger valves in them?
09-22-2008, 01:28 PM
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/\ agree with ls1formulation, send them off to texas speed, they should be able to square you away, then youll have a nice set of budget heads.
Love mine!
Love mine!
09-22-2008, 04:40 PM
#6
I have a set I had done up by Bo White back before he stopped porting. I have the biger valves from 241 heads & they are port/polished/milled .018". I absolutely love them on this little 346 combo of mine. It gets nasty for a baby cam & small cheap heads.
Oh & I run 87 octane(pure gas, no ethonol mixed) with no tune & have had it installed & running this way for a year now without a single issue. And I drive with the A/C on all summer.
Oh & I run 87 octane(pure gas, no ethonol mixed) with no tune & have had it installed & running this way for a year now without a single issue. And I drive with the A/C on all summer.
09-22-2008, 05:01 PM
#7
I have a set I had done up by Bo White back before he stopped porting. I have the biger valves from 241 heads & they are port/polished/milled .018". I absolutely love them on this little 346 combo of mine. It gets nasty for a baby cam & small cheap heads.
Oh & I run 87 octane(pure gas, no ethonol mixed) with no tune & have had it installed & running this way for a year now without a single issue. And I drive with the A/C on all summer.
Oh & I run 87 octane(pure gas, no ethonol mixed) with no tune & have had it installed & running this way for a year now without a single issue. And I drive with the A/C on all summer.
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09-22-2008, 06:31 PM
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I have 5.3's milled .020 and had the cambers CC'd and they came in at 60.4 This is with a 1.57 exhuast and a 2.08 intake Rev valve ported by Jay from Absolute Speed before he folded up shop. Just about 11.3:1 pump gas (93 octane) does fine. Beauty going into the low 10's now with a "GM head".
