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Buell Forum » 1125R Superbike Board » Archive through August 17, 2012 » More compression « Previous Next »

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Mako
Posted on Wednesday, August 01, 2012 - 02:54 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Is there a safe way to boost compression? I live at 7000 ft. And would like to get more air in. I will prob not go below 5000 ft. Elevation.
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Stirz007
Posted on Wednesday, August 01, 2012 - 04:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

You could always shave the heads, but then you'll need to run higher octane to head off detonation. That's about all you can do with normal aspiration (I think).

Ride faster, so you get more ram-air



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Mako
Posted on Wednesday, August 01, 2012 - 07:33 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

is shaving the jug and piston possible.
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Nillaice
Posted on Thursday, August 02, 2012 - 08:09 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

yes, but doing that will retard the valvetrain timing.
adjustable cam gears are available.

i've heard to not remove more than ten thousands from the head and five thousands from the jug.
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Mako
Posted on Thursday, August 02, 2012 - 01:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

thanks
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Stirz007
Posted on Thursday, August 02, 2012 - 01:16 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The 1125 DSB build is basically a 14:1 compression motor. You could try Michael T at: tech@ebracing.com for the amounts they typically mill when building those motors. Reset cam timing is usually part of the equation....
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