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post #1 of 7 (permalink) Old 05-11-03, 04:37 AM Thread Starter
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Question Wanna shave my head

What sort of gain could I expect to see if I were to have the head on my XF shaved?
I know it will up the compression ratio, but how does that translate into real world differences?
Does it improve torque, HP, driveability, or all 3?
Or am I missing something altogether?


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post #2 of 7 (permalink) Old 05-11-03, 05:23 AM
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Shaving the head will cause other problems, better of fitting mild cam and springs & extrators and exhaust.
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post #3 of 7 (permalink) Old 05-11-03, 05:29 AM
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Thought this thread was going to be about haircuts! Sorry for my uncostructive post...


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post #4 of 7 (permalink) Old 05-11-03, 07:56 AM
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Having the heads down will increase torque and power, but can also lead to detonation. It is probably not woth the effort unless you are reconditioning your head anyway. Any increase over about 9:1 compression on the 4.1L and you will probably require premium.
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post #5 of 7 (permalink) Old 05-12-03, 12:32 AM Thread Starter
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ahh ok then, so it's probably not worth doing unless I am putting a new head on.
Fair enough.
Any Suggestions on cams?
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post #6 of 7 (permalink) Old 05-12-03, 12:54 AM
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Crow do some nice grinds for the 4.1L, in several stages depending on how rough you want the idle. Also a good idea to get roller rockers.
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post #7 of 7 (permalink) Old 05-12-03, 01:55 AM
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20 thou should be o/k, or under 9.5 to 1 esp with h.p cam.Tidy carefully any sharp edges in chamber and keep timming initially at std settings..C.C combustion chambers first to work out c/r..

Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic!
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Tuned & maintained by "Peppertree Perfmormance". Dart block, Scat 4340 steel crank, Custom C.P pistons.Oliver rods.. Mal Wood twin plate clutch.. Twin SC61/2's,482 rwkw/ 645 rwhp..
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