427 lsx need head options
Thread Starter
Teching In
Joined: Oct 2009
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427 lsx need head options Alright guys Im not really knowledgeable about putting combos together, so I come for help. I have a 427 lsx block with a 4.125 bore,zero decked with a -2.8cc piston. Cam is around 246 254 .6xx .6xx 113 +3. I'm looking for a good set of heads that will give me good streetability for a dd. I think I need 72cc chambers to make 11.5:1 and I have the lsxr intake.
TECH Resident
Joined: Jan 2011
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From: Tulsa
What kind of budget? Are you staying N/A or are you going to spray it?
I would suggest the TFS 23/45 heads from TEA. They flow awesome. You could get the LSXr Port Matched to them for a little more also.
I would suggest the TFS 23/45 heads from TEA. They flow awesome. You could get the LSXr Port Matched to them for a little more also.
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Launching!
Joined: Jan 2010
Posts: 238
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From: Houston TX
i have been looking at the same set up but with a 4.185 bore and 4.00 stroke
i was recommended by a few friends to go with PRCs 285cc LS7 heads,, if any one has experience with those chime in for the op thats looking ,,
i only have experience with stock ported castings
i was recommended by a few friends to go with PRCs 285cc LS7 heads,, if any one has experience with those chime in for the op thats looking ,,
i only have experience with stock ported castings
With a cathedral port intake, you must use cathedral port heads. AFR and Mast both make very good heads. Personally, I prefer Mast's heads, but AFRs are VERY nice as well.
Peak horsepower might be higher by just a bit on a rectangular port, but from what I have seen on here cathedral ports tend bring more to the table in terms of area under the curve. If you have no budget go with the mast heads but I think a set of AFR's mamofied or not would get you very nice results as well. Since you already have a cathedral port FAST i see no reason to start over just to make the switch to LS7 style heads. Get a nice port match done on the intake and you'll be set.
TECH Resident
Joined: Jan 2011
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From: Tulsa
Tea 235/245 I have a 427 lsx with tfs245 setup for nitrous. It has an aggressive cam in it but made 570 rwhp locked up in a c6 4l60 car then made 830 on a 300 with soft tune. For dd motor go cathedral you will like it better.
Thread Starter
Teching In
Joined: Oct 2009
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I asked afr about it and they said anything bigger than 245cc was too big for street like I want. I might go with mast, also lme said they can get tfs 245 to flow 360cfms at .600 they wanna charge 4700. Can't T.E.A get similar results? I've heard they are pretty good.
