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Ported and polished 5.3L heads

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Old Nov 5, 2003 | 09:36 AM
  #11  
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Texas Speed & Performance has a good selection of heads and will be able to help you pick out the right combo for your truck.
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Old Nov 5, 2003 | 12:45 PM
  #12  
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how about a set of PP 4.8s to raise the compression
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Old Nov 5, 2003 | 01:25 PM
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If you are doing a blower, raised CR is not a good thing. You would want the bigger combustion chamber to lower your CR so you can crank up the boost.

Anyone know off hand what a set of LS1 heads would do for your CR on a stock internal 5.3?
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Old Nov 5, 2003 | 02:35 PM
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Originally Posted by Flyer
If you are doing a blower, raised CR is not a good thing. You would want the bigger combustion chamber to lower your CR so you can crank up the boost.

Anyone know off hand what a set of LS1 heads would do for your CR on a stock internal 5.3?
i understand that higher CR is not good for boost. but i was referring to
the N/A crowd. it is possible to run good being N/A and a lot cheaper
if you know your stuff
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Old Nov 5, 2003 | 03:12 PM
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Originally Posted by devildog92
Where is a good place to drop the 2k worth of parts you mentioned, AND what heads would you recommend in that particular combo?
www.ragingmotorsports.com
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Old Nov 5, 2003 | 03:23 PM
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the texas speed heads are really Patriot Performance heads that they sell. LS6/LQ9 heads are sweet, and typically outflow LS1/LM7 heads 20+cfm, but they are ALWAYS more expensive. i am going with ported LQ9 heads with 2.02/1.60 valves with REV double springs and ti retainers with 7.35" pushrods and a new cam. these heads will go on a 6.0 but will be milled a bit to bring up compression since i'm not gonna be in the boosted crowd and the loss in low end is so minor that it wont be a big deal with a 150-200 shot helping out, not to mention my truck isn't very heavy.
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Old Nov 5, 2003 | 07:23 PM
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I got my stock heads done, and I think it was the biggest bang for the buck Ive done yet. Short of NOS. To have the heads milled was $50 per head and the porting was @ $150 per head. I did the install work and all myself and saved alot that way. I dont know exactly how much HP just the heads made, but stock it dynoed at 259.6 and with the mods N/A it dynoed at 323. The 323 I was using 108 octane with a methanol/ alcohol mixture. Higher compression responds well to good octane.
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Old Nov 5, 2003 | 08:44 PM
  #18  
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Originally Posted by Snake Eater
I got my stock heads done, and I think it was the biggest bang for the buck Ive done yet. Short of NOS. To have the heads milled was $50 per head and the porting was @ $150 per head. I did the install work and all myself and saved alot that way. I dont know exactly how much HP just the heads made, but stock it dynoed at 259.6 and with the mods N/A it dynoed at 323. The 323 I was using 108 octane with a methanol/ alcohol mixture. Higher compression responds well to good octane.
damm homie whats your CR now? i was thinking of porting heads myself. which heads
you have now? for 100 ill have them milled.
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Old Nov 5, 2003 | 10:55 PM
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they are the stock heads. I had them milled .050 whick made the comp. ratio @ 10.3:1. Getting heads milled is cheap enough if you dont mind the work to take them off and put them on.
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