LM7 Heads and Cam Sound Right???
08-08-2008, 03:48 AM
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LM7 Heads and Cam Sound Right??? ok im building a 2000 5.3 vortec heres my combo ls1 241 heads milled .050 thousandths to bump compression and a ls1 hot cam 218 228 525 525 on a 112 lsa sound like it would work???
08-09-2008, 07:29 PM
#4
wouldnt use those heads. i would stick with the 5.3 heads since they flow the same and you wont have to worry about different lenght pushrods cause of milled heads. personally i owuld run a larger cam
08-09-2008, 07:38 PM
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the reason why i wanna run the 241's is because they flow a little better and have bigger valves and from my understanding the ls1 hot cam matches those heads best it was made around the design of those ls1 heads my bro put down 380rwhp with a hot cam and 241 heads on a ls1 so im thinking if i mill the heads .060 what would stop me from making good power either way if i run the truck heads i have to mill them .030 to run right or the ls1 heads .060 to run right i think the 241's would make more power then a smaller valved less flowing truck head right??? this is with no polish or porting just milling the heads whether its a little or extreme milling
08-09-2008, 07:48 PM
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the reason why i wanna run the 241's is because they flow a little better and have bigger valves and from my understanding the ls1 hot cam matches those heads best it was made around the design of those ls1 heads my bro put down 380rwhp with a hot cam and 241 heads on a ls1 so im thinking if i mill the heads .060 what would stop me from making good power either way if i run the truck heads i have to mill them .030 to run right or the ls1 heads .060 to run right i think the 241's would make more power then a smaller valved less flowing truck head right??? this is with no polish or porting just milling the heads whether its a little or extreme milling
Count me as a "disagree".
08-09-2008, 07:57 PM
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08-09-2008, 08:25 PM
#8
there are graphs showing the 5.3 flowing the same as the 241. you dont see many companies using 241s for ported heads. they all use 5.3s.
also i dont think you could take the 241s .060 without the dek being too thin. I personally would leave the 5.3s on there and run a better cam. but its your car and whatever you choice best of luck. just remember milling the heads that much might cause all kinds of issues that can be advoided
also i dont think you could take the 241s .060 without the dek being too thin. I personally would leave the 5.3s on there and run a better cam. but its your car and whatever you choice best of luck. just remember milling the heads that much might cause all kinds of issues that can be advoided
08-09-2008, 08:27 PM
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ok thats fine just explain to me why a 5.3 head milled .030 would be better then a 241 milled .060 it confuses the **** out of me to hear that the smaller valved less flowing head at the same compression ratio will make more power with the hot cam then the 241 head that the hot cam is designed for
OK, if you believe larger valves automatically make more power or even flow more air you aren't going to believe that isn't necessarily true.
Do you tell your doctor what medicine to prescribe or what to cut out of you? Well at least "webmd" generally has better information than much of the internet stuff on what works in engines.
Let a pro do your engine, or at least specify and supply all the non-stock parts. I suggest you not approach the "pro" with your mind already made up. The good ones will just hang up on you or not answer your email.
Folks have had that happen to them and wonder why. Now you know why.
Free advice...and worth it!
08-09-2008, 08:36 PM
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there are graphs showing the 5.3 flowing the same as the 241. you dont see many companies using 241s for ported heads. they all use 5.3s.
also i dont think you could take the 241s .060 without the dek being too thin. I personally would leave the 5.3s on there and run a better cam. but its your car and whatever you choice best of luck. just remember milling the heads that much might cause all kinds of issues that can be advoided
also i dont think you could take the 241s .060 without the dek being too thin. I personally would leave the 5.3s on there and run a better cam. but its your car and whatever you choice best of luck. just remember milling the heads that much might cause all kinds of issues that can be advoided
