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10-14-2011, 11:25 PM | #11 |
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Re: ceramic bearings
If you could only afford one set of ceramic bearings, which set would give
you the biggest advantage? ed |
10-15-2011, 12:39 PM | #12 |
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Re: ceramic bearings
My GUESS would be rear end. I have a Dana 60 with all MW parts. I'm about to get the Performance bearings package for the entire rear. I just need the shop to narrow the axle tubes, put new ends on it and get final measurements so I can get the new axles ordered. Previous axles were MW 40 spline with 11/16" rifle bore. New axles will be MW 40 spline with 1 1/16" rifle bore and 300M material. I'm also changing from 5:13 ratio to 5.86 ratio. Both the old and new ring gear are back-cut. The R&P will be coated (see last paragraph).
I'll take a measurement of torque to rotate the pinion before and after and post the results here. I'm not sure how or if I should measure torque at the axle? Don't expect this next week, this shop is slower than molasses! But we had a long talk yesterday and he's made a commitment to get the chassis & engine done by the end of this year. I'll believe it when I see it but I'm making a big push. I will push real hard to get the Dana up and ready to run. That also involves setting the engine / trans in the car with new motor plates to determine positioning of the Dana and axle size left & right. I'm not sure what MW's lead time is on these 300M axles. So just pushing for the rear-end to be completed will get the chassis well on the way to completion. FYI - Same shop has had a hand in a customers vintage 4-cylinder road race car. After using a propriety coating on all bearings and bushings from front to rear (spindles, trans, rear), the car reduced lap times by 8 seconds. That's huge. He also believes that true ceramic bearings would be better yet.
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Jeff Lee 7494 D/S '70 AMX |
10-15-2011, 02:01 PM | #13 |
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Re: ceramic bearings
I know that top of the line professional bicycles use ceramic bearings. The general consensus is that they are worth it if you must keep up with the Joneses with a big budget but that there are generally a few better ways to spend money for regular folks.
Chris Barnes Wagons of Steel Stock 6621 |
10-15-2011, 02:45 PM | #14 | |
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Re: ceramic bearings
Quote:
But yes, I'm sure $$ can be spent elsewhere for better gains and if it's not in the budget, then that takes care of that. But then again I see people spend $20K on an engine and cry like a baby over spending $2,000 to $3,000 on a clutch that will actually let the car perform like it should.
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Jeff Lee 7494 D/S '70 AMX |
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10-15-2011, 03:25 PM | #15 |
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Re: ceramic bearings
It's just one more example of how a race car or bike is the some of it's parts.
Jumping on a nice bike after a crappy one is impressive. I think the biggest gain on a bike is the light wheels. If you could fit Lance Armstrong's wheels on your Huffy you would be amazed. Hold a heavy wheel in your hand and spin it, it will pull you around the room. Do the same with a light wheel and feel the difference. Of course you would also notice the better bearings during this experiment. Speaking of bearings, wouldn't changing over to ball bearings and lighter lube accomplish much of what we're trying to get from the ceramics? Chris Barnes Wagons of Steel Stock 6621 |
10-16-2011, 03:59 AM | #16 | |
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Re: ceramic bearings
Quote:
If you are spending that much money, why didn't you just put a new 9" under the car with an alum center.
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Scott Wilcox 2193 3x National Champion SS/A, SS/B, SS/K, SS/L, SS/AM, A/SM, C/SM, B/A, C/A, G/A, H/A |
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10-16-2011, 04:46 PM | #17 |
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Re: ceramic bearings
A) I never see a Dana break & I see 9" break. I've been through 3 different gear sets & they always look like new.
B) Bearings are going to be the same one way or another. C) I'm pretty sure the frictional loss is greater on a 9". If I were into changing gears a lot, then a 9" would wipe out the other reasons.
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Jeff Lee 7494 D/S '70 AMX |
10-16-2011, 05:03 PM | #18 |
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Re: ceramic bearings
Oops
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Jeff Lee 7494 D/S '70 AMX Last edited by Jeff Lee; 10-16-2011 at 05:04 PM. Reason: Duplicate post |
10-18-2011, 09:14 AM | #19 |
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Re: ceramic bearings
OK, now that we established this thread, the reason I started it was because a very well known, and successful comp racer told me he spent $ 20,000 on ceramic and never gained a thing. And I know he was trying to help, not lead us astray. What say everyone now. He said don't waste ur time or money.
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10-19-2011, 09:40 PM | #20 | |
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Re: ceramic bearings
Quote:
No Comment.
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Scott Wilcox 2193 3x National Champion SS/A, SS/B, SS/K, SS/L, SS/AM, A/SM, C/SM, B/A, C/A, G/A, H/A |
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