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Old 12-03-2009, 06:41 AM   #1
DeutschMark OP
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Lightening Airhead Lifters

Has anybody lightened airhead lifters with any success? The old Dr. Curve article mentioned elongating the oval hole on the lifter.

If anyone has done this, how much weight is safe to remove?

Thanks.
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Old 12-03-2009, 08:57 AM   #2
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every little bit helps, I guess.

No idea.
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Old 12-03-2009, 10:48 AM   #3
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Never thought of it. I wonder about using titanium? Would there be a metalurgical problem between them and the cam?
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Old 12-03-2009, 04:18 PM   #4
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I once aponatime owned one of the Butler&Smith short rod factory race engines. It did not have the utra trick lifters. I have heard thay where titanium and had to be welded in a vacuum chamber. Some one once made a lifter with a ti button on the top to prevent the push rod from pushing through because of the high spring rates used on the hugh cams. I had an idea to use a R65 lifter its a cup the push rod rides in the bottom. Then the side can be drilled or slotted with no fear of damage. The push rods then need to be longer, Jegs sells a kit ala cut to fit for a hemi eng.
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Old 12-12-2009, 08:43 PM   #5
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Seems like you would only lose a couple of grams....pass on breakfast and take a good dump and you'll likely lose more.......
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Old 12-12-2009, 08:51 PM   #6
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Quote:
Originally Posted by bmwhacker
Seems like you would only lose a couple of grams....pass on breakfast and take a good dump and you'll likely lose more.......
Yeah, but that's not reciprocating weight.... at least, I HOPE NOT!
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Old 12-12-2009, 09:00 PM   #7
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Quote:
Originally Posted by BrianK
Yeah, but that's not reciprocating weight.... at least, I HOPE NOT!

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Old 12-12-2009, 10:32 PM   #8
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I have built a lot of airhead race motors in the past 25 years and this is an area I would not tuch on a street bike. If you ever rev the motor you will crack a lifter and on the street you will never notice the added performance. If your looking for cheap reliable horse power in a Boxer you can do 2 things.

up the compression and port match the heads.
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