TopDeadCenter said:Wheres KBOY when you need him..
How many horses would i be robbing from myself if i dont do the PI Headswap..if i just go with the PI Intake and Cams...what would this give me..the reason im asking is changing to PI heads in a 96-98 motor will really bump your compression right? Well what do you do if your looking to eventually charge or spray? I am really thinking of staying with my heads..cause they're really not that bad..going with the PI Intake and probably Comp Cams..worth it?
Check out the latest issue of MM&FF. The Comp cams added around 40 HP above 3100 RPMs (edit for misinfo). From 2000-3100 they were even with the stock cams and under 2000 the stock out performed the Comps. So my run with Kevin verifies that I have him from a dig but after 3100 RPM's he walks. I'm quoting the numbers from memory but they are pretty close. If I'm mistaken someone correct me.mogs01gt said:Put a .500 & a .550 lift cam in both heads
see which one of the two will perform better stock for stock. Its a waste of money putting cams into the Non PI heads when you have the option of the PI heads. 5-10 rwhp on a cam swap is worthless.
They tested 7 different grinds...(EDIT for wrong info). That is the one (the cam grind you have) I was refering to. The other grinds had better gains on PI heads across the band although a few lost power down low...nothing that 4.10 wouldn't take care of.kboy262 said:I do think the test was on a PI head thou.
coramprat said:Check out the latest issue of MM&FF. The Comp cams added around 40 HP above 3100 RPMs w/NPI heads. From 2000-3100 they were even with the stock cams and under 2000 the stock out performed the Comps. So my run with Kevin verifies that I have him from a dig but after 3100 RPM's he walks. I'm quoting the numbers from memory but they are pretty close. If I'm mistaken someone correct me.
No all of the tests were with ported PI heads they did use some of comps nonPI grinds.coramprat said:They tested 7 different grinds...one was on NPI heads. That is the one (the cam grind you have) I was refering to. The other grinds had better gains on PI heads across the band although a few lost power down low...nothing that 4.10 wouldn't take care of.
OK...I was wrong...I skimmed the article in the Houston Airport yesterday and thought I read they did tests on NPI heads...Sorry for the misinfo.billyfe390 said:No all of the tests were with ported PI heads they did use some of comps nonPI grinds.
No prob it was a good article though.coramprat said:OK...I was wrong...I skimmed the article in the Houston Airport yesterday and though I read they did tests on MPI heads...Sorry for the misinfo.
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