head swap
07-07-2007, 07:35 PM
#22
i think its something about it messes up the harmonics of the valvetrain and it can cause valve spring bind and other problems
aftermarket rockers is not necessary and wont gain any power if staying wit stock ratio. stepping up the ratio just increases lift and duration of the cam, IMO just get the lift and duration you want when you order your cam
aftermarket rockers is not necessary and wont gain any power if staying wit stock ratio. stepping up the ratio just increases lift and duration of the cam, IMO just get the lift and duration you want when you order your cam
07-07-2007, 11:40 PM
#24
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799 = 243 casting. Virtually no difference in ports or chambers as cast. GM has always used 2 casting numbers for each Gen 3 engine combination. For example early year 5.3l engnies have cast numbers 706 & 862. Early year 5.7l engines use 241 and 853 cast numbers. LS6 engines use 243 and 799 cast numbers. I don't have an explaination for this, just an observation.
A properly prepped pair of 5.3l heads will perform pretty similarly to stock 243 and 799 heads. The costs should be pretty similar too.
Richard
A properly prepped pair of 5.3l heads will perform pretty similarly to stock 243 and 799 heads. The costs should be pretty similar too.
Richard
07-08-2007, 05:58 PM
#27
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Originally Posted by Wheatley
Well said Richard
Originally Posted by way2much_01
how much do you guys charge to mill some heads?
Richard
07-08-2007, 07:56 PM
#28
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Originally Posted by way2much_01
how much do you guys charge to mill some heads?
. Well, at least I did back when I could actually drive my truck 
.