Flex plate suggestions
Thread Starter
Registered User
Joined: Jan 2011
Posts: 66
From: Lawrenceville, GA
Flex plate suggestions
Good morning all!
Need to replace my flex plate due to previous starter engagement issues (455 TH400), and looking for some suggestions on an SFI certified flex plate at a reasonable cost. Engine is in the 500hp range.
Thank you all.
Need to replace my flex plate due to previous starter engagement issues (455 TH400), and looking for some suggestions on an SFI certified flex plate at a reasonable cost. Engine is in the 500hp range.
Thank you all.
'72 Cutlass ragtop
Joined: Jun 2016
Posts: 1,309
From: Tampa, FL
https://www.summitracing.com/parts/a...ake/oldsmobile
Nice piece for the price if SFI-level quality if what you want
I still have one sitting on a spare SBO in my garage and it's pretty stout.
Nice piece for the price if SFI-level quality if what you want
I still have one sitting on a spare SBO in my garage and it's pretty stout.
Registered User
Joined: Dec 2016
Posts: 1,970
From: Beautiful Southern Maryland
Whichever one you decide to buy do yourself a favor and take it and your old one to a machine shop that does crankshaft balancing and have them make sure that your new one is balanced the same as the old one. I have seen two aftermarket Olds flexplates in the last year or so that were totally wrong 
Both were SFI ones for what its worth.
Both were SFI ones for what its worth.
Thread Starter
Registered User
Joined: Jan 2011
Posts: 66
From: Lawrenceville, GA
Thank you all,
I went with the ATI SFI flex plate. I have the engine torn down, having it rebalanced. I will start other posts with questions on port matching and modifying my Air gap manifold as well as other things.
Thanks again.
I went with the ATI SFI flex plate. I have the engine torn down, having it rebalanced. I will start other posts with questions on port matching and modifying my Air gap manifold as well as other things.
Thanks again.
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