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Mopar Bolt Patterns

Started by lumpy, March 24, 2006, 07:35:44 PM

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lumpy

March 24, 2006, 07:35:44 PM
How many bolt patterns were used in the 60's and 70's? I have a set of 15X7 stock Chrysler wheels with 5 X 4 1/4" ?? What would these fit on? I thought A bodies were 4" and all others were 4 1/2".

Nacho-RT74

#1
March 24, 2006, 08:30:17 PM
as far I know ALL 5 bolts Mopar pattern are 4 1/2"
Venezuelan RT 74 400 4bbl, 727, 8.75 3.23 open. Now stroked with 440 crank and 3.55 SG. Here is the History and how is actually: http://www.dodgecharger.com/forum/index.php/topic,7603.0/all.html
http://www.dodgecharger.com/forum/index.php/topic,25060.0.html

lumpy

#2
March 24, 2006, 08:39:10 PM
Yeah, that's what I thought too. So far two of us are wrong :yesnod: Anybody else know anything about them??

lumpy

#3
March 24, 2006, 09:34:06 PM
Maybe I'm measuring wrong?? I always went from center to center. But then I find this...


http://www.rockcrawler-mrt.com/bolt_pattern.html

Nacho-RT74

#4
March 25, 2006, 01:30:42 AM
no is from center to center... is from outer edge of one bolt to the center of one of the oposite bolts...

Let me check the link
Venezuelan RT 74 400 4bbl, 727, 8.75 3.23 open. Now stroked with 440 crank and 3.55 SG. Here is the History and how is actually: http://www.dodgecharger.com/forum/index.php/topic,7603.0/all.html
http://www.dodgecharger.com/forum/index.php/topic,25060.0.html

Nacho-RT74

#5
March 25, 2006, 01:32:13 AM
as I thought and stated.

That is because on 5 bolts pattern there is not a real opposite bolt o measure from bolt to bolt and get the exact diameter, so that would be the theorical diameter measurement.

ALL bodies with 5 bolts patterns are the same, including Jeeps, so A, B, C, E, etc... too
Venezuelan RT 74 400 4bbl, 727, 8.75 3.23 open. Now stroked with 440 crank and 3.55 SG. Here is the History and how is actually: http://www.dodgecharger.com/forum/index.php/topic,7603.0/all.html
http://www.dodgecharger.com/forum/index.php/topic,25060.0.html

'CUDA360

#6
March 25, 2006, 03:21:06 PM
Right, the two main bolt patterns are 5 on 4 for A-bodies and 5 on 4 1/2 for the rest. 

In 1973 A-bodies with disc brakes changed to 5 on 4 1/2 but drum brake cars stayed 5 on 4 until 1976

John_Kunkel

#7
March 25, 2006, 06:27:16 PM
Imperials prior to '74 have a 5 X 5" bolt pattern.
Pardon me but my karma just ran over your dogma.

Shakey

#8
March 31, 2006, 08:00:05 AM
I've been taught to measure from the centre of one stud across to the centre of another stud.  centre to centre

John_Kunkel

#9
April 01, 2006, 08:06:42 PM
Measuring across the studs only works if there are an even number of studs, with five lugs the studs are never directly across from each other and the measurement will be wrong.
Pardon me but my karma just ran over your dogma.

Shakey

#10
April 02, 2006, 10:30:57 AM
Quote from: John_Kunkel on April 01, 2006, 08:06:42 PM
Measuring across the studs only works if there are an even number of studs, with five lugs the studs are never directly across from each other and the measurement will be wrong.

When you measure from the centre of one stud, across to another stud (never beside) you will get your bolt pattern measurement.

Switch it up, pick two different studs to measure, centre to centre, again, not beside each other, and you will get your bolt pattern measurement.

Of course, with 5 stud holes you will not be able to measure across the centre of the hub.

Attached is a link of what I have been taught.

http://www.mrt-wheels.com/boltpattern.html
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