midnight04 Posted July 5, 2009 Report Share Posted July 5, 2009 MY 2004 LS1 PORTED RACING CYLINDER HEADS 265CC THESE HEADS WERE PORTED TO THE MAX!!!!!! THEY CAME OFF OF MY 2004 5.3L CHECK THEM OUT IN E-BAY IM GOING WITH THE NEW LS7 HEADS...... http://cgi.ebay.com/ebaymotors/ws/eBayISAP...em=270420932647 AND THE LINK TO MY TRUCK BUILD.. http://www.gm-trucks.com/forums/index.php?...em&CID=1438 Quote Link to comment Share on other sites More sharing options...
midnight04 Posted July 6, 2009 Author Report Share Posted July 6, 2009 Sorry I forgot to give the flow #'s on the heads INTAKE 352 @600 LIFT (4" TEST BORE ) EXHAUST 271 @600 LIFT (4" TEST BORE ) MY CAM = 0.578 IN / 0.583 EX...... Quote Link to comment Share on other sites More sharing options...
misterp Posted July 6, 2009 Report Share Posted July 6, 2009 How many miles/passes are on them? Were they used with nitrous or FI? I assume they are 5.3L castings, is that correct? Who did the head work? What are the valve sizes? What is the chamber size? Do the rocker arms come with it, are they GM or aftermarket or have aftermarket trunions? What length pushrods are you using now? What kind of camming and manifolding is required to run correctly with these heads? Thanks. Mr. P. Quote Link to comment Share on other sites More sharing options...
midnight04 Posted July 6, 2009 Author Report Share Posted July 6, 2009 How many miles/passes are on them?Were they used with nitrous or FI? I assume they are 5.3L castings, is that correct? Who did the head work? What are the valve sizes? What is the chamber size? Do the rocker arms come with it, are they GM or aftermarket or have aftermarket trunions? What length pushrods are you using now? What kind of camming and manifolding is required to run correctly with these heads? Thanks. Mr. P. The $1,000.00 I spent on the flow testing and porting, was mostly on flow testing.. $120. for2 head's each time I went...lol I went like 8 times hahaha that was when I was a rookie on the cathedral porting....Now I can get the same results in 1 or 2 tests... I got my cousins 5.3L stockers to flow... 301 @600 224 @600 Using the stock valves.. I have the Porting Power on the cathedral port heads down to a science now... after screwing up a couple sets early on in the learning process on the cathy port's...lol...hahaha I have been porting heads with my dad since I was little..... I do all our 979hp dirt late model heads...Ill include a pick of one of our Late Models.... the heads have 45,000mi on them and 10 to 12 passes As stated in the auction 2004 5.3L 862 castings THE INTAKE VALVES ARE 2.05 EXHAUST ARE 1.60 Combustion Chambers are 61.15cc Stock length push rods FAST 92mm or LS2/GTO 90mm Intake is best.... I do have the Truck intake that we ported to the heads lots of torque but drops off at around 5200.. As for cams that is up to you I was running a custom ground cam based on the flow #'s but a hot cam or LS6 0.550/0.551 PN 12565308 will work just fine. My Cam is in the 570's and 580's.. Quote Link to comment Share on other sites More sharing options...
hossram64 Posted July 6, 2009 Report Share Posted July 6, 2009 Just want to say A+++ for a great seller, bought a ported TB came like is was new from factory. and shipped in a timely manner. Quote Link to comment Share on other sites More sharing options...
midnight04 Posted July 6, 2009 Author Report Share Posted July 6, 2009 Just want to say A+++ for a great seller, bought a ported TB came like is was new from factory. and shipped in a timely manner. Thank you very much.. let me know when you put it on.... Thx. Mike Quote Link to comment Share on other sites More sharing options...
midnight04 Posted July 8, 2009 Author Report Share Posted July 8, 2009 BUMP!!!! Quote Link to comment Share on other sites More sharing options...
midnight04 Posted July 9, 2009 Author Report Share Posted July 9, 2009 Auction's ending soon Quote Link to comment Share on other sites More sharing options...
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