Re: How to tell B and RB cranks apart without tools??
[Re: jughed]
#2553520
09/23/18 09:06 AM
09/23/18 09:06 AM
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Joined: Jan 2003
Posts: 9,986 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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master
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Posts: 9,986
Frostbitefalls MN (Rocky&Bullw...
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The main bearing journals are smaller on the B cranks. RBs are 2.750, Bs are 2.675? An RB crank will have a circumference of 8.639 inch, or 8 5/8 plus a touch.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: How to tell B and RB cranks apart without tools??
[Re: gregsdart]
#2553622
09/23/18 01:54 PM
09/23/18 01:54 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
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^^^ cut a strip of paper & measure the circumference then divide Pi into that for the journal diameters Greg posted.
live every 24 hour block of time like it's your last day on earth
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Re: How to tell B and RB cranks apart without tools??
[Re: DoctorDiff]
#2553738
09/23/18 05:52 PM
09/23/18 05:52 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
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Circle Track
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Lincoln Nebraska
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That's too easy! Thanks Doc.
live every 24 hour block of time like it's your last day on earth
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Re: How to tell B and RB cranks apart without tools??
[Re: DoctorDiff]
#2553755
09/23/18 06:21 PM
09/23/18 06:21 PM
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Joined: Jan 2003
Posts: 9,986 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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Frostbitefalls MN (Rocky&Bullw...
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You don't have to measure anything.
If the rear main bearing journal is almost the same diameter as the rear main seal journal, you have an RB crank.
If the main bearing journal is noticeably smaller, you have a B crank. Like homer would say,, Doh,,,,!!!!!
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: How to tell B and RB cranks apart without tools??
[Re: DoctorDiff]
#2553913
09/24/18 12:16 AM
09/24/18 12:16 AM
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Joined: Mar 2006
Posts: 1,229 In The Hills
jughed
OP
pro stock
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OP
pro stock
Joined: Mar 2006
Posts: 1,229
In The Hills
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The main bearing journals are smaller on the B cranks. RBs are 2.750, Bs are 2.675? An RB crank will have a circumference of 8.639 inch, or 8 5/8 plus a touch. You don't have to measure anything.
If the rear main bearing journal is almost the same diameter as the rear main seal journal, you have an RB crank.
If the main bearing journal is noticeably smaller, you have a B crank. Thank you both!! that is what i wanted to know. ...and who keeps a tape measure in their pocket at all times??
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Re: How to tell B and RB cranks apart without tools??
[Re: jughed]
#2553975
09/24/18 09:22 AM
09/24/18 09:22 AM
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Joined: May 2005
Posts: 4,713 Florida
BDW
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master
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Re: How to tell B and RB cranks apart without tools??
[Re: jughed]
#2554002
09/24/18 11:02 AM
09/24/18 11:02 AM
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Joined: Nov 2003
Posts: 12,494 Western Colorado High Desert
moparmarks
I Live Here
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I Live Here
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Western Colorado High Desert
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..and who keeps a tape measure in their pocket at all times?? Well that would be me, and Ron I guess
72 Satellite Sebring Plus 440, 72 Dart 5.9 4-spd, 68 Valiant, 73 W200, 78 D100 sb, 78 D200, 98 DAKOTA, . Moparmarks Parts & Restorations Desert Mopar Metal Grand Jct. CO 970-261-7039 http://moparmark.com/motormangj@gmail.com
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Re: How to tell B and RB cranks apart without tools??
[Re: moparmarks]
#2554029
09/24/18 12:12 PM
09/24/18 12:12 PM
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Joined: Jan 2003
Posts: 43,523 Round Lake Beach, Illinoisy
Rhinodart
Rhinotruck
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Rhinotruck
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Round Lake Beach, Illinoisy
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You two are almost twins, I know I don't look anything like the hedgehog...
Last edited by Rhinodart; 09/24/18 12:16 PM.
The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.
JB Rhinehart, Realist
A-Body's RULE!
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Re: How to tell B and RB cranks apart without tools??
[Re: Rhinodart]
#2554067
09/24/18 01:45 PM
09/24/18 01:45 PM
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Joined: Nov 2003
Posts: 12,494 Western Colorado High Desert
moparmarks
I Live Here
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I Live Here
Joined: Nov 2003
Posts: 12,494
Western Colorado High Desert
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You two are almost twins, I know I don't look anything like the hedgehog... We are twins where it counts.
72 Satellite Sebring Plus 440, 72 Dart 5.9 4-spd, 68 Valiant, 73 W200, 78 D100 sb, 78 D200, 98 DAKOTA, . Moparmarks Parts & Restorations Desert Mopar Metal Grand Jct. CO 970-261-7039 http://moparmark.com/motormangj@gmail.com
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