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Author Topic:   Speedway Motors Flexplate
posted August 22, 2003 06:21 PM
Has anyone tried out the GM 153 tooth lightweight flexplate. It weighs 2.8 or 2.9 lbs and says its good for use with 2 or 3 disc clutch. It looks kinda like a + with a ring gear welded around it. Just wondering if these things are durable, I know its only turning over the engine but don't want something thats going to be crap.

posted August 22, 2003 10:00 PM
Thanks, thats the kind of answers i'm looking for. Anybody elses opinions would be appreciated as well. Oh, what exactly happens when they brake?

[This message has been edited by sbc350 (edited August 22, 2003).]

Racer X
posted August 23, 2003 07:08 AM
i've ran one all year without problems. i turn it as high as 7400rpm. good so far


posted August 24, 2003 02:25 AM
I personally think that any flexplate that comes apart at high rpm will knock the nose cone and things like that off. I had a stock style SFI approved flexplate come apart, and it cut the fuel line, exploded the bell housing, destroyed the starter and knocked a hole in the hood of my modifed. Right now on one motor iam using a lightweight flexplate, and have had no problems 7600rpm

posted August 24, 2003 09:47 AM
What typically makes a flexplate come apart anyways? Poor balance causing it to vibrate and crack?

[This message has been edited by sbc350 (edited August 24, 2003).]

posted August 24, 2003 10:38 AM
when you run a flexplate with a mini clutch, the flexplate isn't thick enough to stay "in shape" at high rpm's. especially on a tacky track when the engine is lugging, the flexplate will be wobbling all over the place which can cause it to crack. remember, it was designed to be bolted to a stiff torque converter.

i broke one once and the vibration was so bad it broke the tailshaft housing on my transmission.

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