Any Point in porting stock heads?
This is a discussion on Any Point in porting stock heads? within the Internal Engine forums, part of the LSx Technical Help Section category; I have a friend who is getting a set of LS6 heads for his vette. He said he'd sell me ...
04-21-2009, 08:18 PM #1
- Join Date
- Feb 2006
- Buckeye, AZ
- 2000 WS6 TA
Any Point in porting stock heads?
I have a friend who is getting a set of LS6 heads for his vette. He said he'd sell me his old set cheap. Is there any point in having a set of stock 5.7 heads ported with bigger valves or should I save my money and get a set of LS6 heads my self? And while we're on it: LS6 head and 5.3 heads, what's the difference and which is better?
04-22-2009, 03:23 AM #2
If you are doing the porting and polishing yourself I'd say go for it, you would be suprised how much material you can get out of the stock heads and really make them flow. I'd say do the port and polish, then take them to a shop and have them milled down some and get the bigger valves put it.
the main difference between the 5.3 and ls6 (243) heads are the ls6 already have the bigger valves and runners.
I haven't had it on a dyno yet, but I'm running my stock 241 heads. I ported and polished the hell out of them and it made a big difference you can feel
Last edited by mark21742; 04-22-2009 at 03:26 AM.
04-22-2009, 05:03 AM #3
The difference between 5.3 and 5.7(LS1-6) heads is head chamber volume. A 5.3 has a less CC volume, therefor, giving you a bump in compression right of the get go. Everybody has thier opinion on which head is right.
04-22-2009, 08:14 AM #4
Just buy a set of CNC ported heads and be done with it
04-22-2009, 11:29 AM #5
04-23-2009, 08:12 AM #6
How hard is it to port and polish heads yourself?
04-23-2009, 08:37 AM #7
I have some pics of a cutaway head section I'll try to post up for you this weekend
04-24-2009, 02:54 PM #8
Last edited by Smittro; 04-24-2009 at 02:57 PM.
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04-24-2009, 04:07 PM #9
Just remember, once the material is gone, its gone.
04-24-2009, 04:28 PM #10
04-24-2009, 05:49 PM #11
04-24-2009, 07:03 PM #12
04-24-2009, 08:34 PM #13
04-26-2009, 09:26 AM #14
Up date!!!!! I've been talking about rebuilding my rebuilding my 3.4L TDC, for some time now. So I sent my heads to be machined and set up for a turbocharger. Found out my "home" port and polish was FU *(*9 up so bad can't be reused!!!! My advise is DONT DO THEM AT HOME!. Good luck!! Here, it's about 500 or so to get my machine work done. Add the $685.00 for the new LQx heads! I can think of over a thousand things to spend $1200.00 on other than stock "STILL" need machined heads!!!!Just my .02
Last edited by Smittro; 04-26-2009 at 09:39 AM.
04-26-2009, 10:09 AM #15
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