Camshaft roller bearings

J.R. Haddad · 12-11-2016, 05:55 PM

Are you allowed Roller Bearings on the cam in Stock?
Thanks.

Bob Mulry · 12-11-2016, 08:05 PM

Quote:

Originally Posted by J.R. Haddad

Are you allowed Roller Bearings on the cam in Stock?
Thanks.

Is it for safety??????????????

Ed Wright · 12-11-2016, 08:23 PM

Do they allow 52 or 55mm cam cores?

I always ask my Div Tech Director questions like this. Does the rule book mention them? They tell me, if it doesn't say you can, you can't.

Bill Diehl · 12-11-2016, 09:28 PM

Not to open up the ant farm but I would chalk this up to the lifter rule that's just been clarified even though "some" been running them for years...same for the .842/.875/.904 dia. everybody knows whats supposed to fit where....but

carry on with the discussion

J.R. Haddad · 12-11-2016, 09:47 PM

Bob, I think it would enhance safety. Less chance of locking up the motor!

Alan Nyhus · 12-12-2016, 06:33 AM

J.R.: Roller bearings only if the engine was originally equipped with them. Rollers in rollers, babbitts in babbitts. Cam journal size can be changed.

Stay warm. -Al

carl hinkson · 12-12-2016, 09:24 AM

I do a lot of cam tunnel blue printing and roller cam bearings seem to be a thing of the past. Roller cam bearing transfer alot of harmonics though the valve train.

I see alot of BBC cam journals (2.120 housing bore ) for the OEM GM blocks using the GMP-1

I have custom 55MM babbit cam bearings for a 2.282 housing bore which seems to be very common in SBC, BBC, and the SBF

What block was the OP talking about.

carl hinkson · 12-12-2016, 09:29 AM

Quote:

Originally Posted by J.R. Haddad

Are you allowed Roller Bearings on the cam in Stock?
Thanks.

What block are you talking about ?

J.R. Haddad · 12-12-2016, 08:11 PM

SBC 010 Block or Dart replacement. Thanks. J.R.

carl hinkson · 12-12-2016, 08:40 PM

Quote:

Originally Posted by J.R. Haddad

SBC 010 Block or Dart replacement. Thanks. J.R.

A 010 block you can't go with a 55MM cam it will push the oil band of the lifters up out of the lifter bores because of short lifters bores. Plus going to a 55MM with Babbit cam bearings you have to machine the cam tunnel to 2.282 and when doing the annular oil grooves in back of the cam baring there is a good chance of getting into the water jackets.

The Dart SHP Pro block comes with BBC cam tunnel and .904 lifter bores, I have gone to 55MM babbit cam bearings in those blocks with no problems.

What lifters can you run ? Roller, Flat tappet ?

12-11-2016, 05:55 PM	#1
J.R. Haddad Senior Member Join Date: Jun 2012 Posts: 784 Likes: 933 Liked 1,464 Times in 307 Posts	Camshaft roller bearings Are you allowed Roller Bearings on the cam in Stock? Thanks.

12-11-2016, 08:23 PM	#3
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Camshaft roller bearings Do they allow 52 or 55mm cam cores? I always ask my Div Tech Director questions like this. Does the rule book mention them? They tell me, if it doesn't say you can, you can't. __________________ Ed Wright 4156 SS/JA Last edited by Ed Wright; 12-11-2016 at 08:26 PM.

12-11-2016, 09:28 PM	#4
Bill Diehl Member Join Date: Dec 2013 Posts: 311 Likes: 2 Liked 9 Times in 8 Posts	Re: Camshaft roller bearings Not to open up the ant farm but I would chalk this up to the lifter rule that's just been clarified even though "some" been running them for years...same for the .842/.875/.904 dia. everybody knows whats supposed to fit where....but carry on with the discussion __________________ __________________ Bill Diehl B200 C/D STK

12-11-2016, 09:47 PM	#5
J.R. Haddad Senior Member Join Date: Jun 2012 Posts: 784 Likes: 933 Liked 1,464 Times in 307 Posts	Re: Camshaft roller bearings Bob, I think it would enhance safety. Less chance of locking up the motor!

12-12-2016, 06:33 AM	#6
Alan Nyhus VIP Member Join Date: Dec 2002 Location: Lower Dakota territory Posts: 1,180 Likes: 1,074 Liked 799 Times in 236 Posts	Re: Camshaft roller bearings J.R.: Roller bearings only if the engine was originally equipped with them. Rollers in rollers, babbitts in babbitts. Cam journal size can be changed. Stay warm. -Al __________________ "That'll never work....." Last edited by Alan Nyhus; 12-12-2016 at 07:26 AM.

12-12-2016, 09:24 AM	#7
carl hinkson Member Join Date: Feb 2007 Location: NORTHEAST Posts: 287 Likes: 1 Liked 18 Times in 10 Posts	Re: Camshaft roller bearings I do a lot of cam tunnel blue printing and roller cam bearings seem to be a thing of the past. Roller cam bearing transfer alot of harmonics though the valve train. I see alot of BBC cam journals (2.120 housing bore ) for the OEM GM blocks using the GMP-1 I have custom 55MM babbit cam bearings for a 2.282 housing bore which seems to be very common in SBC, BBC, and the SBF What block was the OP talking about.

12-12-2016, 08:11 PM	#9
J.R. Haddad Senior Member Join Date: Jun 2012 Posts: 784 Likes: 933 Liked 1,464 Times in 307 Posts	Re: Camshaft roller bearings SBC 010 Block or Dart replacement. Thanks. J.R.