SFI flexplate mandatory in all v8s Jan 2024

[Kevin Panzino]

Originally Posted by MR DERBY CITY

Here we go , didn’t take long for this to happen after unfortunate incident in D-4. I personally would only use an SFI flex plate as I really like my two feet. This rule just insures that the V8 in the other lane has one also.

I assume one came apart? I hadn't heard of the incident in D-4.

[4543]

I’m glad that this rule is being adopted! Lots of difference between stock one and a certified one. Mike McMahan 2543 H/SA

[dragracerray]

I have been using a SFI flexplate but it has expired. Do they have a 3 year certified life? I can not remember. Ray

[MikeMoller]

Like to know how they will be checking that-they don’t check anything these days

[greg h williams]

Both Jegs and Summit sell a stock appearing flexplate that is SFI approved.If you have one of these,I suggest that you replace it with a quality piece.I don't know which flexplate was involved in the last D4 race,but we had one of the inexpensive ones a few years back on our B/ED and a section of the ring come off.How can that part pass SFI specs? There are more of these incidents than you would think.We replaced ours with a billet Meziere.Quality part.

[Paul Precht]

There's a lot of difference between a Mopar flex plate and a GM flex plate. The Mopar is much smaller and lighter, one piece and has no ring gear welded on. I don't think its possible for a Mopar stocker to break a flex plate. They do fatigue and crack around the bolt holes but still don't come apart.

[Steve Stasko]

I just bought a couple different Chrysler flexplates. I bought an eBay special that had "Meets SFI standards" or something thereabout engraved/punched into it, and then I bought a PRW from Summit. The latter is about an 1/8th inch thicker, and actually has an SFI sticker on it. The PRW unfortunately does not say anywhere on it or in the instructions of where it is made, but I am assuming overseas.

I'll have to take a pic of the other one and post it tonight, but something about it just made me uneasy, so I bought the PRW. I've never had any issues with a Chrysler flexplate of any kind, and don't intend to start.

My last round in 2019 the flex plate in the Coronet broke completely. Right around where all the bolts were attached. It was a Mopar performance plate that looked like a star. I couldn’t have made another round. Replaced it with a B&M piece. Much nicer and more robust. It definitely broke, probably a few years old and was through a few recerts.

Originally Posted by Paul Precht

There's a lot of difference between a Mopar flex plate and a GM flex plate. The Mopar is much smaller and lighter, one piece and has no ring gear welded on. I don't think its possible for a Mopar stocker to break a flex plate. They do fatigue and crack around the bolt holes but still don't come apart.

[Greg Reimer 7376]

Does any body have a brand name/part number, et al for the 14" replacement unit for my 327? I don't mind replacing it while I'm apart right now, just want to be sure I have the right brand and part number.

[Paul Precht]

Originally Posted by Todd Hoven

My last round in 2019 the flex plate in the Coronet broke completely. Right around where all the bolts were attached. It was a Mopar performance plate that looked like a star. I couldn’t have made another round. Replaced it with a B&M piece. Much nicer and more robust. It definitely broke, probably a few years old and was through a few recerts.

I had that happen on my Cuda back in the mid 70s but it was never a dangerous situation, there's not enough mass, circumference or welded on parts to enable it to come near the danger and damage that a GM flex plate can do.