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flexplate help 4l60 in c5

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Old Dec 27, 2014 | 05:54 PM
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Default flexplate help 4l60 in c5
Can i just upgrade to the summit sfi flexplate?..i unbolted the stock one does not seem to come apart...also theres washers between plates on stock one...
paul


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Old Dec 27, 2014 | 09:03 PM
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Here's what mine looks like:

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Old Dec 27, 2014 | 10:59 PM
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is that the flywheel kit from rpm for 275?

or

Quick Time Bellhousing RM-990 - QuickTime OEM Replacement


which i think are the same
Last edited by blown81bu; Dec 27, 2014 at 11:52 PM.
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Old Dec 29, 2014 | 05:29 PM
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Yeah it came from RPM and has a billet adapter.
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Old Dec 29, 2014 | 10:55 PM
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When I broke my flex plate last summer I ordered an SFI C5 flex plate from a big brand retailer. At the time, I didn't realize it needed this special adapter. I called and they insisted it was the correct part. I asked how to mate it to the hub adapter and they dismissed me as not knowing anything.

I got the RPM piece (shown above) and it worked perfect.

Now I have a spare SFI flex plate. I'm gonna put it in my buddy's LQ powered 82 corvette.
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Old Dec 30, 2014 | 03:46 PM
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thats def stronger than the stock one that i never broke..it def puts the clamping force were it needs to be in the center were it would crack if it ever did
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Old Jan 1, 2015 | 09:41 PM
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Old Jan 2, 2015 | 07:37 PM
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yowza!
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How much rwhp did it take to damage the stock flex plate?I am collecting parts now to do a auto conversion to my FRC and I don't know if I need to buy the aftermarket flex plate/coupler. I am looking for any advise! Thanks Dan
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Old Jan 8, 2015 | 04:15 PM
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dan i had 914 rwhp and 900tq with an auto and my stock flexplate is still fine with a 1.2 60 foot to boot

i got the rpm/quicktime 990 now...
Last edited by blown81bu; Jan 8, 2015 at 04:47 PM.
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Old Jan 11, 2015 | 08:36 PM
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I'm only at about 700 at the crank. But, the stock flex plate likely had well over 1000 passes on it before it broke. It just wore out...
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