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Re: R block cam Journal question [Re: 1967dartgt] #1782260
03/30/15 04:18 PM
03/30/15 04:18 PM
Joined: Jan 2008
Posts: 795
Glendale Az
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Darryls-Demon Offline
super stock
Darryls-Demon  Offline
super stock
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Joined: Jan 2008
Posts: 795
Glendale Az
Quote:

Quote:

Quote:

for some reason I seem to remember Callies coming up in the conversation. Maybe I'm wrong.... still confuses the ever lovin s##t out of me


they do they had 8 instock when i got mine ,110 l/c




I have a 112 but would love more.




The cam in my R3 motor is from LSM and it has 115 LSA.
I have no plans on using NOS so I think the motor would be happier with around 110 LSA.

Re: R block cam Journal question [Re: 1967dartgt] #1782261
03/30/15 06:14 PM
03/30/15 06:14 PM
Joined: Jan 2011
Posts: 137
Daytona Beach, FL
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cknight Offline
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cknight  Offline
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Posts: 137
Daytona Beach, FL
A 50mm babbit cam bearing usually requires a housing bore of 2.0985/2.0995", Regards, Chase

Re: R block cam Journal question [Re: Leon441] #1782262
03/30/15 08:44 PM
03/30/15 08:44 PM
Joined: Feb 2007
Posts: 1,025
Las Vegas, NV
dodgeboy11 Offline
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dodgeboy11  Offline
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Posts: 1,025
Las Vegas, NV
Unless they're oddballs, should be a bore size of 2.242" 55mm fit into a 2.480. If I remember correctly.

Re: R block cam Journal question [Re: dodgeboy11] #1782263
03/30/15 10:04 PM
03/30/15 10:04 PM
Joined: Oct 2007
Posts: 3,978
Hilltown Pa
1967dartgt Offline
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1967dartgt  Offline
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Posts: 3,978
Hilltown Pa
2.135 approximately. Not the most round and don't have block.


Brett Miller W9 cnc'd heads
STR Chassis fabraction
Re: R block cam Journal question [Re: 1967dartgt] #1782264
03/30/15 11:03 PM
03/30/15 11:03 PM
Joined: Apr 2007
Posts: 1,390
CA.
RAY1969CARS Offline OP
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RAY1969CARS  Offline OP
pro stock

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Posts: 1,390
CA.
Apparently the block can't be bored out to a roller using a CNC talk to QMP they can do it it just can't be done with a mandrel type boring needs a 90° Head because of the number five journal is so small And stupid me I have all these race manuals I just looked in the first one and found all the necessary measurements

8475796-image.jpg (72 downloads)
Last edited by RAY1969CARS; 03/30/15 11:04 PM.
Re: R block cam Journal question [Re: RAY1969CARS] #1782265
03/31/15 12:58 AM
03/31/15 12:58 AM
Joined: Nov 2009
Posts: 3,082
St. Paul , Mn.
tubtar Offline
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tubtar  Offline
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Posts: 3,082
St. Paul , Mn.
Quote:

Apparently the block can't be bored out to a roller using a CNC talk to QMP they can do it it just can't be done with a mandrel type boring needs a 90° Head because of the number five journal is so small And stupid me I have all these race manuals I just looked in the first one and found all the necessary measurements




Well..........that changed the way I look at things.
I also thought that all 48 degree blocks used the same cam bearing bore on every journal , but apparently the 48 degree R-1 and some early R blocks used stepped bearings.
I would have thought a mandrel would work too......sounds like it gets involved. Do you need to bore four , then re-set for #5 ?
One more operation and the probable tolerance stacking would have me thinking long and hard.

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