Where to buy this flexplate?
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by NUckINg FuTS
It seems that know one sells a flexplate for internal balanced 1 piece rear main 350's. Any have a source that does? Thanks.
RACE ON!!!
Thread Starter
Melting Slicks
Joined: Oct 2000
Posts: 2,019
Likes: 2
From: Na
Can't use my old one because it's for a 2 piece exernally balanced engine. My new engine combo calls for a neutral balanced flexplate for a 1 piece rear main (has to be SFI certified as well).
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by NUckINg FuTS
Can't use my old one because it's for a 2 piece exernally balanced engine. My new engine combo calls for a neutral balanced flexplate for a 1 piece rear main (has to be SFI certified as well).
RACE ON!!!
Pro
Joined: Apr 2003
Posts: 517
Likes: 0
From: South Lyon Michigan
I bought 2 flexplates, both were from GM and both were made for an internally balanced 1-piece rear main seal. I have a ZZ4 short block and they require the flexplate. I have a flexplate that is brand new for a internally balanced 1-piece rear main seal if you want, I bought it for my previous starter but never used it, it is a 168 tooth flexplate. The bad thing about the GM flexplates are that they are made for TC's with the 12" or 13" bolt pattern and on the one I have on my car now I had to drill 3 new holes for my smaller TC. The 168 tooth flexplate is untouched, if you want it let me know. If not then you can get the same ones I have through GM performance parts. Good luck.
Thread Starter
Melting Slicks
Joined: Oct 2000
Posts: 2,019
Likes: 2
From: Na
Originally Posted by CFI-EFI
GM never made a neutral balance flexplate for a one piece seal crank. All production one piece seal engines have imbalance in the rear due to the different shape of the crank flange.
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Thread Starter
Melting Slicks
Joined: Oct 2000
Posts: 2,019
Likes: 2
From: Na
Originally Posted by jp2002ls1
I bought 2 flexplates, both were from GM and both were made for an internally balanced 1-piece rear main seal. I have a ZZ4 short block and they require the flexplate. I have a flexplate that is brand new for a internally balanced 1-piece rear main seal if you want, I bought it for my previous starter but never used it, it is a 168 tooth flexplate. The bad thing about the GM flexplates are that they are made for TC's with the 12" or 13" bolt pattern and on the one I have on my car now I had to drill 3 new holes for my smaller TC. The 168 tooth flexplate is untouched, if you want it let me know. If not then you can get the same ones I have through GM performance parts. Good luck.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by NUckINg FuTS
Crap! You learn something new every day. Okay, to be a little more specific this flexplate will be going on a factory ZZ4 shortblock. So this will require I use ex. balanced flexplate? Also, I already have a powermaster XS starter for a 153 tooth so I obviously can't use a 168 tooth FP
Sorry if I caused any panic, but the initial post of a one piece seal engine, "internally balanced", left doubt for the possibility of a mismatch. That really isn't what you have.
RACE ON!!!
