Crank lightening
Crank lightening
Crank lightening
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Junior User
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Crank lightening
Did anyone opt for the crank lightening?
Although many of the techniques they use to lighten aren't beneficial to high rpm, it still helps the 400 rev quicker, a little less weight, and cut through the oil better.My machinist claims he can knock out close to 10 lbs and still not require much balancing.I know the 5 lbs difference in my aluminum driveshaft made a difference. Just wondering if this could be $400 spent elsewhere.
Although many of the techniques they use to lighten aren't beneficial to high rpm, it still helps the 400 rev quicker, a little less weight, and cut through the oil better.My machinist claims he can knock out close to 10 lbs and still not require much balancing.I know the 5 lbs difference in my aluminum driveshaft made a difference. Just wondering if this could be $400 spent elsewhere.
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Junior User
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Crank lightening
Double knife-edging for reduced windage,oil-free counterweights for perhaps 3 hp.
Chamferred oil holes & gun driled mains would help the big 3" mains stay lubed at higher rpms.
10 bs less would help me pass through the rpms a lot quicker.Freeing up at least 3-5 hp from not having to turn a 10 lb heavier rotating mass. Especially running a 260/260 duration @ .050 cam. Higher rpm is where I need to be where more power can be made.
It's actually $350. $50 to balance. It's not that bad I guess.
Chamferred oil holes & gun driled mains would help the big 3" mains stay lubed at higher rpms.
10 bs less would help me pass through the rpms a lot quicker.Freeing up at least 3-5 hp from not having to turn a 10 lb heavier rotating mass. Especially running a 260/260 duration @ .050 cam. Higher rpm is where I need to be where more power can be made.
It's actually $350. $50 to balance. It's not that bad I guess.
Lead Driver
Joined: Nov 2000
Posts: 6,646
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From: Albuquerque
Crank lightening
Hmmmmm, I polished mine myself when I had a lot of time on my hands. Did not do knife edging and only took off manybe 1/2 pound? Ten pounds seems like a lot to make up for on balancing. You might get in to using some expensive Mallory metal inserts.
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Crank lightening
I thought the same thing, but the crank specialist said it will still need balancing but not a lot of extensive addition of mallory. Anything more would require major additions of metal. I consider close to 10 lbs to be between 8-9 lbs actually which is still good when talking about a rotating mass. Like I said before, my aluminum driveshaft had a noticeable difference at only 5 lbs less than the stock weight.
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Junior User
Joined: Jan 2003
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Crank lightening
The old shaft was not vibrating. However, an alum shaft will smooth out any vibrations in the driveline. It was swapped for performance reasons. Freed up about 3 hp and noticeable quicker acceleration. Just a tad.
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