I am looking to get a set of heads for the 4.8 I want some thing that is going to flow good, and I want to have them milled to raise the compression to about 11:1. What is a good head for the money? I am just not looking to spend 2,000 on a set of heads for the 4.8. If you have a place and a price that would be great, I need some thing with a core swap because i can't have my truck down for more than the time it takes me to swap the heads.
Step 1. crus at it.
Step 2. get a hammer.
Step 3. torch it.
some stock gm 317, or 241
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http://www.ls1truck.com/forums/my-ga...tml#post274877
honestly budget isnt a word to use in the LS world
but if you want a head look into a set of PRC 5.3 heads. problem with you wanting big compression from a 4.8 is its going to be near impossible to do it. youre already starting off with a 61cc chamber. you can only mill a head so far before he dek is too thin. tossing any other head on is only going to send you in the opposite direction. Your best best is the new TFS heads and have those milled since they run a 3/4 thick dek. that gives you more meat to take off but down fall is once your 4.8 dies yoru SOL with a head that has been milled to around 54 or 55 cc
2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
2002 Silverado - 427Lsx w/ Twin gt4202s
2010 Silverado crewcab Z71 - 5.3litre w/ procharger
2000 Wrangler - 5.3litre with some stance
2014 Xsport- 3.5 Eco boost
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it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference
What size is the combustion chamber on my heads now?
Step 1. crus at it.
Step 2. get a hammer.
Step 3. torch it.
quik knows his 4.8s hahaha
04 1500 5.3L custom hp tuners tune by myself don have a pic of it yet so hear is my old 01 chevy 5.3 460hp 13.669 @ 116
Some milled 243's off LS6/LS2
wont get to 11-1 but up around 10-1
be into them for much less than $1,000 and will
flow all that 4.8 is good for anyway.
I wouldnt get hung up on 11-1 compression thing.
either port and mill your stock truck heads
or gets some used 243's and just mill them.
You'll be in the 9.5 - 10.0 compression area, which is fine with a healthy cam
2002 Tahoe 4.8 - soon to be turbo'd - SOLD
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09/21/2010 02:31 <danger_ranger83> I'm not really worried about the looks...I want it to be fast and ugly...bc no one wants to get outrun by something ugly
there isnt enough meat on a 243 casting to be safely milled enough to raise compression up to 10.0. your starting off at 61cc at 9.5 with the stock heads. 243 are 64.5 and that takes your compression to 9.0. you would have to mille them roughly .03 to get to 9.5. then you would need roughly another .03 to reach 10.0. thats roughtly .06 on a head that only has a .5 deck. with that muc off the heads you shoudl angle mill them and then have intake matched up. not worth it for minimal gainsOriginally Posted by r.barn
every .5cr is only worth 15-20 hp this goes up and down for CR
2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
2002 Silverado - 427Lsx w/ Twin gt4202s
2010 Silverado crewcab Z71 - 5.3litre w/ procharger
2000 Wrangler - 5.3litre with some stance
2014 Xsport- 3.5 Eco boost
412 Motorsports
it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference
On a 4.8 just P&P, valve job & mill your stock 862s that's the best bang for the buck
Title sounded kinda......easy? lol
2013 CC 5.3
81 C10 LS1 project
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