What flex plate for 4l80e
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Staging Lane
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From: Brooksville/Tampa, FL
What flex plate for 4l80e I know the standard 4l80 flex plate uses a 6 bolt torque converter pattern. Looking to get a billet stall converter or something similar and it seems that most aftermarket converters use a 3 bolt converter pattern. This being the case would I be able to use a regular 4l60 flex plate with the 3 bolt pattern for an aftermarket stall or would they still be different? Also how would a factory flex plate hold up to say 1000rwhp or would you reccomend upgrading to an aftermarket plate? Thanks
The 3 lug LS 4L80 converter is becoming more common than the regular 6 lug style these days. It does make swaps very easy. If you are aiming to hit 1K at the tires then I would definitely suggest an SFI flexplate. The reason I like the 3 lug LS design over the typical 4L80 is it eliminates the pilot extender, the converter pilot is longer to engage in the crank. You can also use the OE style 4L80 with the crank spacer, which is a good design but relies on the weak OE flexplate. The problem is I don't think anybody makes a flat SFI flexplate with the 4L80 bolt pattern.
Hope all that made sense...
Chris
Hope all that made sense...
Chris
Thread Starter
Staging Lane
iTrader: (3)
Joined: May 2008
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From: Brooksville/Tampa, FL
So the Sfi flex plate has a dish to it that will allow it to reach the torque converter without the use of a spacer? And most aftermarket 3 lug 4l80 converters will still have a pilot shaft long enough to engage the crank without a spacer?
Thread Starter
Staging Lane
iTrader: (3)
Joined: May 2008
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From: Brooksville/Tampa, FL
I found this one on circle D's website
http://circledspecialties.com/p-79-l...flexplate.aspx
And this one from tci
http://m.summitracing.com/parts/TCI-399754/
Just wandering what the difference is between these two other than the price?
http://circledspecialties.com/p-79-l...flexplate.aspx
And this one from tci
http://m.summitracing.com/parts/TCI-399754/
Just wandering what the difference is between these two other than the price?
I believe the TCI plate is a little more "beefy". That TCI plate is not the one you would use for a 3 bolt converter though. It would be the standard LS1 plate. FWIW, this is the plate I run.
http://www.ws6project.com/user_stor/...late-HP-4004X/
http://www.ws6project.com/user_stor/...late-HP-4004X/
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The offset between the crank and converter mounting surface needs to be ~.575. You can achieve this with a .425 spacer and a .150 flat flexplate or with the dished style plate at .575. When you use the spacer setup it also extends the crank out so a regular style GM converter will work, which extends out ~.200 from the converter pad. But when you use the dished style flexplate you need the LS style converter pilot which extends out about .550 from the converter pad. So if you want to use a non LS converter with the dished style flexplate you need a converter pilot extender.
Hopefully my rambling is making sense......
Chris
Hopefully my rambling is making sense......
Chris
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