ls3 heads
03-31-2011, 09:18 PM
#1
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ls3 heads I have a 6.0 engine I am gettin ready to put in my truck i have dish top lq4 pistons in it right now i was thinkin about puttin ls2 pistons in it. Will I have to fly cut the pistons ? if so how hard is this ?
04-01-2011, 01:18 AM
#3
Yea depends on what cam you use... I have an 6.0 LQ9 block with flat tops and stock gasket .051 crush and I am running a bigger cam than listed above without PTV issues... Did not fly cut either....
FWIW....Geoff Skinner that owns EPS speced and cut it for me....
FWIW....Geoff Skinner that owns EPS speced and cut it for me....
04-02-2011, 09:09 AM
#6
Yes, Geoff is the man on getting you a cam to make good power from what you have. My cam is spec'd from him also.
04-05-2011, 12:24 AM
#7
Anytime you keep the valve open for a long period of time you have more PTV issues...Def more so than total lift...
with that being said I also understand that the cam as a whole has more variables than duration alone...although I never said that mine has more duration so mine is bigger...
Either way...Geoff is the man
with that being said I also understand that the cam as a whole has more variables than duration alone...although I never said that mine has more duration so mine is bigger...
Either way...Geoff is the man
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04-09-2011, 08:14 PM
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with LS2 flat tops, i had to definitely flycut on a 24x/24x, .620 &110 LSA...
That's with stock head gasket and unmilled LS3 heads. I also tried the stock dish piston and that hit also, but not to the same degree, of course.
Fly cutting isn't a huge deal, but it does take some time to do it properly. You can probably get a cam spec'd that DOESN't require flycutting and achieve the same (or close) HP/Tq. on a street car/truck.
That's with stock head gasket and unmilled LS3 heads. I also tried the stock dish piston and that hit also, but not to the same degree, of course.
Fly cutting isn't a huge deal, but it does take some time to do it properly. You can probably get a cam spec'd that DOESN't require flycutting and achieve the same (or close) HP/Tq. on a street car/truck.
