ported 241s or 243s?
Thread Starter
Teching In
Joined: Oct 2013
Posts: 44
Likes: 0
From: West
Hmmm those spdc heads look tempting I'll do some more research. Thanks for the replies everyone this is my first time working on an ls1 and doing any major work so all the suggestions helped!
I want to thank you for posting that bit of info . Do you expect a 20 cfm difference if they tested with a 1.875 by 4" pipe on the exhaust v.s. none ?
Keep in mind large flow numbers @ .600 lift + are not going to help anyone using a plastic intake. Go with bigger .300 to .575 flow numbers for plastic. That's why these heads are so competitive and cost efective.
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TECH Fanatic
Joined: Aug 2011
Posts: 1,324
Likes: 6
From: Marengo, Ia
I still say 241's or budget aftermarket castings like TrickFlow 220 as cast or PRC 225 as cast. By the time you buy some good 243's for ~$350, then have them ported $1000, and buy some good dual springs $300 you're only $150 from buying PRC 225 as cast and $450 from Tooley or TEA built TrickFlow 220 as cast heads.