LS9 head gasket
02-20-2014, 03:02 PM
#1
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LS9 head gasket
Bore is 3.900 gasket is 4.060 @ .05 thick
Volume is .050014 in sq = .8195cc (too much)
I'll just put them on the shelf and use some
Other time ! Time to order something else now
Volume is .050014 in sq = .8195cc (too much)
I'll just put them on the shelf and use some
Other time ! Time to order something else now
02-21-2014, 11:46 PM
#2
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What are you saying here? The gaskets are too thin, too much compression? Too thick, too little compression?
The fact they are for a 4.000+ bore is fine on the smaller engines as far as that goes. Those gaskets have been used on 5.3 and 4.8 engines time and time again.
The fact they are for a 4.000+ bore is fine on the smaller engines as far as that goes. Those gaskets have been used on 5.3 and 4.8 engines time and time again.
02-23-2014, 02:23 PM
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What are you saying here? The gaskets are too thin, too much compression? Too thick, too little compression? The fact they are for a 4.000+ bore is fine on the smaller engines as far as that goes. Those gaskets have been used on 5.3 and 4.8 engines time and time again.
Will drop cr .8 (almost) 1.0 cc.... Which is good
For stock engines to lower cr but building a
Motor with 9to1 using ls9 gasket won't be 9to1
02-24-2014, 10:55 AM
#7
You're only opening the bore size a .160, which is very minimal difference between the 2 gaskets. Running the numbers on a compression calculator between the two gaskets, a 3.900 bore gasket and a 4.06 bore gasket of the same .050 thickness, yielded only a .1 drop in compression. My example went from 10.16 to 10.06 just changing the bore size of the gasket. Not almost full point like your implying
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02-25-2014, 12:50 AM
#9
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Your thinking is flawed, Yes the area of the gasket opening is .8 cc, but you forgot to take into account the area of the gasket it is replacing. You're only opening the bore size a .160, which is very minimal difference between the 2 gaskets. Running the numbers on a compression calculator between the two gaskets, a 3.900 bore gasket and a 4.06 bore gasket of the same .050 thickness, yielded only a .1 drop in compression. My example went from 10.16 to 10.06 just changing the bore size of the gasket. Not almost full point like your implying
You're only opening the bore size a .160, which is very minimal difference between the 2 gaskets. Running the numbers on a compression calculator between the two gaskets, a 3.900 bore gasket and a 4.06 bore gasket of the same .050 thickness, yielded only a .1 drop in compression. My example went from 10.16 to 10.06 just changing the bore size of the gasket. Not almost full point like your implyingAnd by the way took your advice bought an s480 instead of pt88 but don't
Let that go to your head tho with you and your calculator
Last edited by LSter; 02-25-2014 at 01:04 AM.
02-25-2014, 11:16 AM
#10
Ok hair dryer man,now my flawed thinking wants Me to cc both 3.9 and 4.06 gaskets .that will yield the answer ! but for now .8 is .8 however If you were to cut me a good deal on a hot pipe kit I can over look this hole thing .... Cheers
And by the way took your advice bought an s480 instead of pt88 but don't
Let that go to your head tho with you and your calculator
And by the way took your advice bought an s480 instead of pt88 but don't
Let that go to your head tho with you and your calculator
There is a reason the fast guys are running my stuff.