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08-07-2017, 09:41 AM | #1 |
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more thoughts about needle bearings
Consider this thought,
In ref to bushed lifters vs needle bearing lifters, driveshafts have needle bearings in the u-joints.
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Larry Woodfin 471W |
08-07-2017, 10:55 AM | #2 | |
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Re: more thoughts about needle bearings
Quote:
Most of my builds I have been using the Morel .904 lifters with needles in about everything and to date not one problem. |
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08-07-2017, 01:46 PM | #3 |
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Re: more thoughts about needle bearings
Guys like Carl and other engine builders would obviously see the results and the pros and cons of each type. I am no expert, IMO the needle type is more efficient than a bushed lifter. What causes a roller on a needle bearing lifter to stop turning and goon the cam etc. ? I think if the engine gets a flash of rpm, like wacking the throttle in the water, the spring slams the lifter on the cam and it puts a flat spot on a needle and that leads to a failure.
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08-07-2017, 03:19 PM | #4 |
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Re: more thoughts about needle bearings
I have run needle bearings (Isky Red Zone) for a few years now, with zero problems, as long as I send them back for a "rebuild" every winter. They won't go two seasons. Mine seldom sees over 8300, with 1015 lbs Open spring pressure.
Your results may vary. LOL
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Ed Wright 4156 SS/JA |
08-07-2017, 03:25 PM | #5 |
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Re: more thoughts about needle bearings
I have had more problems with ISKY roller lifters only as far as sizing, Never been able to buy just one set always 2 sets and one build took 3 sets to get the sizing correct.
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08-07-2017, 05:00 PM | #6 |
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Re: more thoughts about needle bearings
What valve springs are you using?
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Mike Pearson 2485 SS |
08-07-2017, 07:10 PM | #7 |
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Re: more thoughts about needle bearings
I have not had that problem.
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Ed Wright 4156 SS/JA |
08-07-2017, 07:14 PM | #8 |
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Re: more thoughts about needle bearings
1356 pac.
Why does it keep changing caps to lower case??
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Ed Wright 4156 SS/JA Last edited by Ed Wright; 08-07-2017 at 08:02 PM. |
08-07-2017, 08:25 PM | #9 |
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Re: more thoughts about needle bearings
Thanks Ed
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Mike Pearson 2485 SS |
08-08-2017, 09:23 AM | #10 |
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Re: more thoughts about needle bearings
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Ed Wright 4156 SS/JA |
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