65mm and 70mm cam bearings
+2
Scott Foxwell
JBR-3
6 posters
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65mm and 70mm cam bearings
JBR-3 November 13th 2016, 4:42 pm
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Last edited by JBR-3 on February 22nd 2020, 3:20 am; edited 1 time in total (Reason for editing : .)
JBR-3- Posts : 266
Join date : 2009-08-17
Re: 65mm and 70mm cam bearings
JBR-3 November 13th 2016, 5:29 pm
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Last edited by JBR-3 on February 22nd 2020, 3:20 am; edited 1 time in total (Reason for editing : .)
JBR-3- Posts : 266
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Re: 65mm and 70mm cam bearings
Scott Foxwell November 13th 2016, 9:45 pm
I used 60mm babbitt bearings in the 611. They were a Durabond bearing that I think we got from Calico. Don't know about 65 or 70mm.
Calico 60040 for the 60mm babbitt and I think we have a set on the shelf.
Calico 60040 for the 60mm babbitt and I think we have a set on the shelf.
Scott Foxwell- Posts : 419
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Age : 65
Location : E Tennessee
Re: 65mm and 70mm cam bearings
JBR-3 November 14th 2016, 3:53 pm
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Last edited by JBR-3 on February 22nd 2020, 3:20 am; edited 1 time in total (Reason for editing : .)
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Re: 65mm and 70mm cam bearings
Scott Foxwell November 15th 2016, 2:13 pm
When you do this I'm pretty sure you have to plug one (or both) of the rear lifter oil galley holes before you bore the cam tunnel.JBR-3 wrote:New tidbit to share for those interested.
I have a Elim Premier block that I want to put these extra large cam bearings into. The front bearing can't go
much bigger or you'll lose the thrust retainer bolt holes. Got the solution from Mike Bowery. Just enlarge the
last four cam journals but don't touch #1. Machine the tunnel from the rear. Yes, you end up with 2 different size
cam bearings, and you must obviously change the cam from the rear. But there is room for 70mm babbitt bearings
in the Premier block if done this way. I have not looked closely at my A460 block for this mod, may work, may not.
Hope this helps someone.
Scott Foxwell- Posts : 419
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Age : 65
Location : E Tennessee
Re: 65mm and 70mm cam bearings
Lem Evans November 15th 2016, 2:30 pm
Before a guy got committed to something bigger than 60mm make sure that the bottom of the lifter valley is high enough to allow the big bore.
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Re: 65mm and 70mm cam bearings
JBR-3 November 15th 2016, 9:33 pm
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Last edited by JBR-3 on February 22nd 2020, 3:21 am; edited 1 time in total (Reason for editing : .)
JBR-3- Posts : 266
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Re: 65mm and 70mm cam bearings
Lem Evans November 15th 2016, 11:07 pm
What size is the tunnel now? Standard or 2.50"?
Lem Evans- Posts : 7445
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Location : Livermore , Ky -
Lem Evans- Posts : 7445
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Location : Livermore , Ky -
Re: 65mm and 70mm cam bearings
JBR-3 November 15th 2016, 11:41 pm
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Last edited by JBR-3 on February 22nd 2020, 3:21 am; edited 1 time in total (Reason for editing : .)
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Re: 65mm and 70mm cam bearings
JBR-3 November 17th 2016, 1:41 pm
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Last edited by JBR-3 on February 22nd 2020, 3:22 am; edited 1 time in total (Reason for editing : .)
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Re: 65mm and 70mm cam bearings
10.0 November 18th 2016, 4:38 am
You could give Carrol Carter a call, he'd know what size the bearings come in.
And what size is too big to fit in block.
And what size is too big to fit in block.
10.0- Posts : 54
Join date : 2011-04-23
Re: 65mm and 70mm cam bearings
Wheelie58 November 23rd 2016, 8:24 am
Take a look at Keith Fulp's 618 in Proven Builds on this forum. There are pictures of an Eliminator block bored out for 60 MM rollers. Plenty of material around the thrust plate bolts.
Engine Systems keeps the bearings. You MUST use a narrower bearing in the front position or the distributor will not go in.
Call any time for details.
678-458-2033
Keith
Engine Systems keeps the bearings. You MUST use a narrower bearing in the front position or the distributor will not go in.
Call any time for details.
678-458-2033
Keith
Wheelie58- Posts : 1842
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Location : Alpharetta, GA -
Re: 65mm and 70mm cam bearings
JBR-3 November 23rd 2016, 9:49 pm
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Last edited by JBR-3 on February 22nd 2020, 3:23 am; edited 1 time in total (Reason for editing : .)
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Re: 65mm and 70mm cam bearings
Wheelie58 November 24th 2016, 7:01 am
JB
The 60MM roller bearings that I am familiar with are 68MM OD (2.677"). I have no experience with the 60 or 65 MM babbit type...I am a roller guy. :-)
Thanks,
Keith
The 60MM roller bearings that I am familiar with are 68MM OD (2.677"). I have no experience with the 60 or 65 MM babbit type...I am a roller guy. :-)
Thanks,
Keith
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Re: 65mm and 70mm cam bearings
Scott Foxwell November 24th 2016, 11:24 am
Here you go JBR3
Last edited by Scott Foxwell on November 24th 2016, 11:47 am; edited 1 time in total
Scott Foxwell- Posts : 419
Join date : 2011-06-23
Age : 65
Location : E Tennessee
Re: 65mm and 70mm cam bearings
Scott Foxwell November 24th 2016, 11:45 am
Wheelie58 wrote:Take a look at Keith Fulp's 618 in Proven Builds on this forum. There are pictures of an Eliminator block bored out for 60 MM rollers. Plenty of material around the thrust plate bolts.
Engine Systems keeps the bearings. You MUST use a narrower bearing in the front position or the distributor will not go in.
Call any time for details.
678-458-2033
Keith
You don't have t use the narrow bearing in front. You can use the standard bearing and do this:
Of course, if you're using a roller, that doesn't quite work.
If you don't know about this ahead of time, you can definitely run into some grief. Friend of mine has his engine assembles and went to drop in the dist. Imagine his frustration.
Personally I don't see any advantage to roller bearings. The Eliminator block comes with a 2.500" cam bearing bore and the 60mm babbitt bearings fit nice and snug. I wasn't real crazy about the surface finish on the cam bearing tunnel but it was adequate.
Scott Foxwell- Posts : 419
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Age : 65
Location : E Tennessee
Re: 65mm and 70mm cam bearings
JBR-3 November 24th 2016, 3:05 pm
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Last edited by JBR-3 on February 22nd 2020, 3:27 am; edited 2 times in total (Reason for editing : .)
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Re: 65mm and 70mm cam bearings
rmcomprandy November 24th 2016, 3:27 pm
JBR-3 wrote:Thanks Scott, that is the picture.
I'm calmer now.
I don't suppose anyone manufactures an oversize diameter thrust retainer now do they ?
YEA ... the person building the engine can MAKE one; like builders used to do before they could buy almost everything.
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Re: 65mm and 70mm cam bearings
JBR-3 November 24th 2016, 4:21 pm
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Last edited by JBR-3 on February 22nd 2020, 3:28 am; edited 1 time in total (Reason for editing : .)
JBR-3- Posts : 266
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Re: 65mm and 70mm cam bearings
10.0 November 24th 2016, 8:56 pm
My block came with the large cam core babbit bearings, always have had needle cam bearings before.
Supposed to make more hp with babbit over needles, less friction when cam is running on a film of oil.
Alls I know, with big spring pressure it is a bitch to turn over by hand, setting valves.
I prime the oil each time, makes it a little easier, needle bearings didn't care.
Supposed to make more hp with babbit over needles, less friction when cam is running on a film of oil.
Alls I know, with big spring pressure it is a bitch to turn over by hand, setting valves.
I prime the oil each time, makes it a little easier, needle bearings didn't care.
10.0- Posts : 54
Join date : 2011-04-23
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