SFI flexplate mandatory in all v8s Jan 2024

Originally Posted by mike britt

In this case the flexplate did not break or come out. It was still bolted to the crankshaft. What happened was the ring gear welds came loose and the ring gear started coming apart in pieces. I found one piece about 2 inches long by the accelerator pedal in bills car. It looked like a stock flexplate to me, but the rules did not require the car to have an SFI flexplate.

So there you go, a 7k plus RPM engine with a stock flexplate. He didn’t do anything wrong, but if he had an ATI or equivalent SFI flexplate there wouldn’t have been an incident. Probably a cast ring gear that wasn’t rated to go that high or for that much power.

[Billy Nees]

But the bottom line still is the fact that a 10.0 bracket car doesn't need an SFI flex plate and there are probably a dozen or more 10.0 to 11.99 of them for every N/S and lower Stocker out there. The SFI deal should be 11.99 and quicker.

Pat, Lonnie, are you listening? Or would you rather that I give you both a call?