Quick question about AA pistons..., Which way does the arrow point? |
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Quick question about AA pistons..., Which way does the arrow point? |
BMXerror |
May 3 2008, 09:12 PM
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#1
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Senior Member Group: Members Posts: 1,705 Joined: 8-April 06 From: Hesperia Ca Member No.: 5,842 |
Well, anyone who's used them? Does the arrow point up or down?
Mark D. |
r_towle |
Sep 23 2011, 06:42 PM
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#2
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Custom Member Group: Members Posts: 24,591 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
measure the wrist pin placement to see if it is centered in the diameter of the piston.
If it is offset (somewhere around 8mm) that would be the bottom of the piston on a stock motor....and the top in a race motor...lol If they are offset, you want the rod closer to the bottom of the motor...I hope that makes sense. Makes it quieter with less piston slap when it reverses direction. Early 911 had this...then it went away..then it came back again. beetle and 356 and type 4 have the offset pins. Rich |
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