5.3 head on LS1
Thread Starter
Staging Lane
Joined: Nov 2006
Posts: 51
Likes: 0
From: Batesville, AR
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?
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.
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.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
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".
