Re: Flex Plate Question
[Re: 6PAX]
#3148848
06/05/23 12:42 PM
06/05/23 12:42 PM
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Joined: Jan 2003
Posts: 25,796 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,796
Rio Linda, CA
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IMO, the factory flexplate will be just fine. The B&M #10230 has multiple bolt holes for both bolt circles and the large and small bolts.
The INTERNET, the MISinformation superhighway
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Re: Flex Plate Question
[Re: 6PAX]
#3148867
06/05/23 01:19 PM
06/05/23 01:19 PM
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Joined: Aug 2003
Posts: 43,174 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,174
Bend,OR USA
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Mopar made three different 6 bolts for the crankshafts stock production flex plates, 12.0 inch with the 5/16 bolt and a 11.0 with the same bolts as well as a 11.0 with the lager 7/16 bolts for the Hi Po motors like the 426 M.W and 440 magnums with the smaller 11.0 inch Hi Po converters. A lot of the early, pre1969 I think, Hi Po 375 HP 440 motors came with the 12.0 inch converters with the smaller 5/16 converter bolts also
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Flex Plate Question
[Re: 6PAX]
#3149359
06/07/23 11:37 AM
06/07/23 11:37 AM
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Joined: Feb 2013
Posts: 141 Missouri
randavis
member
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member
Joined: Feb 2013
Posts: 141
Missouri
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I have a PRW on my 511" RB. It's an 8 bolt crank. The flex plate has holes for about any converter out there. It's been on there since 2021. No issues with it.
74 Challenger, bought it new. In 1978 I replaced the original 318 with a 446 and 727. Mild cam, Jardine headers, and Holley Sniper EFI. New engine! 511" RB, Edelbrock Performer RPM heads, Eagle rotating assy, Comp hyd roller cam, Doug's 2" headers.
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Re: Flex Plate Question
[Re: randavis]
#3149922
06/09/23 09:10 AM
06/09/23 09:10 AM
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Joined: Jan 2003
Posts: 5,621 Detroit area
6PAX
OP
master
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OP
master
Joined: Jan 2003
Posts: 5,621
Detroit area
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I have a PRW on my 511" RB. It's an 8 bolt crank. The flex plate has holes for about any converter out there. It's been on there since 2021. No issues with it. Which PRW plate do you have?
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Re: Flex Plate Question
[Re: 6PAX]
#3149977
06/09/23 12:09 PM
06/09/23 12:09 PM
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Joined: Feb 2013
Posts: 141 Missouri
randavis
member
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member
Joined: Feb 2013
Posts: 141
Missouri
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P/N 1841310 Platinum series. It's SFI spec 29.1 rated for 3 years.
74 Challenger, bought it new. In 1978 I replaced the original 318 with a 446 and 727. Mild cam, Jardine headers, and Holley Sniper EFI. New engine! 511" RB, Edelbrock Performer RPM heads, Eagle rotating assy, Comp hyd roller cam, Doug's 2" headers.
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