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R block cam Journal question #1782200
03/17/15 08:06 PM
03/17/15 08:06 PM
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RAY1969CARS Offline OP
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Can a Standard step journal be machined out to a 50 mm ???

Re: R block cam Journal question [Re: RAY1969CARS] #1782201
03/17/15 08:13 PM
03/17/15 08:13 PM
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Romeo MI
MR_P_BODY Offline
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Quote:

Can a Standard step journal be machined out to a 50 mm ???




Sorry.. I was gonna get back with you but I havent
found my stock cam yet

Re: R block cam Journal question [Re: MR_P_BODY] #1782202
03/17/15 08:16 PM
03/17/15 08:16 PM
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RAY1969CARS Offline OP
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Quote:

Quote:

Can a Standard step journal be machined out to a 50 mm ???




Sorry.. I was gonna get back with you but I havent
found my stock cam yet





no worries bro

Re: R block cam Journal question [Re: RAY1969CARS] #1782203
03/17/15 10:18 PM
03/17/15 10:18 PM
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Hilltown Pa
1967dartgt Offline
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I do not believe so, I think they measure 52 mm.


Brett Miller W9 cnc'd heads
STR Chassis fabraction
Re: R block cam Journal question [Re: 1967dartgt] #1782204
03/18/15 01:14 PM
03/18/15 01:14 PM
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mr_340 Offline
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Are you talking about the block or the cam?

Re: R block cam Journal question [Re: mr_340] #1782205
03/18/15 01:17 PM
03/18/15 01:17 PM
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Romeo MI
MR_P_BODY Offline
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Quote:

Are you talking about the block or the cam?




The cam itself... does anyone know what size the large
journal is on a stock cam... I looked but cant find
the spec

Re: R block cam Journal question [Re: MR_P_BODY] #1782206
03/18/15 01:28 PM
03/18/15 01:28 PM
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mr_340 Offline
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If this will copy over from the 1967 Dodge Service Manual for the 273/318 engine:

1.998"-1.999" on the #1 cam journal. I couldn't get it to copy and paste from the PDF.

Re: R block cam Journal question [Re: mr_340] #1782207
03/18/15 01:47 PM
03/18/15 01:47 PM
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Romeo MI
MR_P_BODY Offline
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Quote:

If this will copy over from the 1967 Dodge Service Manual for the 273/318 engine:

1.998"-1.999" on the #1 cam journal. I couldn't get it to copy and paste from the PDF.




Ray... based on this and this 50 millimeter = 1.968503937 inch
but I know that my 50mm cam had to be ground a bit
to fit the bearings so its a bit oversized... measure
that #1 journal on that stick.. its gonna be very close..
and in some cases the bearings are over sized(I have
had most of them that needed to be sized)..
or bore the cam tunnel to 50mm roller specs

Re: R block cam Journal question [Re: MR_P_BODY] #1782208
03/18/15 02:11 PM
03/18/15 02:11 PM
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RAY1969CARS Offline OP
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Quote:

Quote:

If this will copy over from the 1967 Dodge Service Manual for the 273/318 engine:

1.998"-1.999" on the #1 cam journal. I couldn't get it to copy and paste from the PDF.




Ray... based on this and this 50 millimeter = 1.968503937 inch
but I know that my 50mm cam had to be ground a bit
to fit the bearings so its a bit oversized... measure
that #1 journal on that stick.. its gonna be very close..
and in some cases the bearings are over sized(I have
had most of them that needed to be sized)..
or bore the cam tunnel to 50mm roller specs


I'll check it as soon as I get home around 330 thank




Re: R block cam Journal question [Re: RAY1969CARS] #1782209
03/18/15 10:56 PM
03/18/15 10:56 PM
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Lynchburg, VA
Leon441 Offline
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I forget the O.D. of the 50mm needle bearings. But, yes you can have the tunnel bored for 50mm roller bearings.


Career best 8.02 @ 169 at 3050# and 10" tires small block power.
Re: R block cam Journal question [Re: RAY1969CARS] #1782210
03/18/15 11:02 PM
03/18/15 11:02 PM
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bean town ....Ca
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WHITEDART Offline
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55 mm cores are cheap from comp cams


In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: R block cam Journal question [Re: WHITEDART] #1782211
03/18/15 11:10 PM
03/18/15 11:10 PM
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Romeo MI
MR_P_BODY Offline
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Quote:

55 mm cores are cheap from comp cams




He has a 48* babbit block... I sold him a 48* 50mm
by accident thinking it was a babbit one.. when I
checked my stash I got rid of the babbit one along
the line somewhere .. now he is trying to see if the
50mm can be cut to babbit specs.. he could cut the
block to 50mm and use what he has now but he wants
the babbit set up

Re: R block cam Journal question [Re: MR_P_BODY] #1782212
03/18/15 11:15 PM
03/18/15 11:15 PM
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St. Paul , Mn.
tubtar Offline
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48 degree babbit blocks are not stepped journals ........ they take their own bearing sets and are all the same diameter.
http://www.jegs.com/i/Mopar-Performance/312/P4876372/10002/-1?parentProductId=1903872

I am pretty sure the 59 degree blocks use the stepped bearings like the stock blocks.

Re: R block cam Journal question [Re: tubtar] #1782213
03/18/15 11:20 PM
03/18/15 11:20 PM
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Romeo MI
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Quote:

48 degree babbit blocks are not stepped journals ........ they take their own bearing sets and are all the same diameter.
http://www.jegs.com/i/Mopar-Performance/312/P4876372/10002/-1?parentProductId=1903872

I am pretty sure the 59 degree blocks use the stepped bearings like the stock blocks.




I didnt know that about the 48* block.. thanks but
I did on the 59*

Re: R block cam Journal question [Re: tubtar] #1782214
03/19/15 02:38 AM
03/19/15 02:38 AM
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RAY1969CARS Offline OP
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Quote:

48 degree babbit blocks are not stepped journals ........ they take their own bearing sets and are all the same diameter.
http://www.jegs.com/i/Mopar-Performance/312/P4876372/10002/-1?parentProductId=1903872

I am pretty sure the 59 degree blocks use the stepped bearings like the stock blocks.




Here are the only cams I know of and as. far as bearing

8464619-image.jpg (99 downloads)
Re: R block cam Journal question [Re: RAY1969CARS] #1782215
03/19/15 02:47 AM
03/19/15 02:47 AM
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mike I only have calipers no mic but I'm getting 1.995 on the cam

Re: R block cam Journal question [Re: Leon441] #1782216
03/19/15 02:49 AM
03/19/15 02:49 AM
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RAY1969CARS Offline OP
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Quote:

I forget the O.D. of the 50mm needle bearings. But, yes you can have the tunnel bored for 50mm roller bearings.




That would be the key to what I want to do you know any OD and what the block is actually measuring for the press of the bearings are the numbers I may need

Re: R block cam Journal question [Re: RAY1969CARS] #1782217
03/19/15 02:57 AM
03/19/15 02:57 AM
Joined: Jun 2003
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Romeo MI
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Quote:

mike I only have calipers no mic but I'm getting 1.995 on the cam




Now you need to measure the front bearing to see what
it is

Re: R block cam Journal question [Re: tubtar] #1782218
03/19/15 06:46 AM
03/19/15 06:46 AM
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Cairns Queensland Australia. T...
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vc360 Offline
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Quote:

48 degree babbit blocks are not stepped journals ........ they take their own bearing sets and are all the same diameter.
http://www.jegs.com/i/Mopar-Performance/312/P4876372/10002/-1?parentProductId=1903872

I am pretty sure the 59 degree blocks use the stepped bearings like the stock blocks.




That's not correct. The early48 deg "r" blocks and "r1a"blocks used stepped journals like a 59 block but with 48 degree lobe spacing.
I have one and it uses std small block cam bearings.
Call bullet or midway cams.

Re: R block cam Journal question [Re: vc360] #1782219
03/19/15 09:14 AM
03/19/15 09:14 AM
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St. Paul , Mn.
tubtar Offline
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Quote:

Quote:

48 degree babbit blocks are not stepped journals ........ they take their own bearing sets and are all the same diameter.
http://www.jegs.com/i/Mopar-Performance/312/P4876372/10002/-1?parentProductId=1903872

I am pretty sure the 59 degree blocks use the stepped bearings like the stock blocks.




That's not correct. The early48 deg "r" blocks and "r1a"blocks used stepped journals like a 59 block but with 48 degree lobe spacing.
I have one and it uses std small block cam bearings.
Call bullet or midway cams.




Why does this not surprise me ?
Add that to the which oil pan and which crankshaft journal questions then.
I am pretty sure that the MoPar UGL cams for the babbit blocks are all gone , but cores can be sourced elsewhere.
But like everything else with these motors , bring your wallet.

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