SFI flexplate mandatory in all v8s Jan 2024
 

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. :)

Re: SFI flexplate mandatory in all v8s Jan 2024
 

It looks like I won't be putting my 301 Pontiac back together any time soon.

Re: SFI flexplate mandatory in all v8s Jan 2024
 

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

Re: SFI flexplate mandatory in all v8s Jan 2024
 

I would actually have more faith in an older flex plate. Most of the newer ones are probably Chinese made. I bought a summit brand for my car last and it was a Pioneer brand stamped into it. It is SFI approved. Next time I have it out I will look for a better wheel. I have an ATI safety bell housing too.
That was a fluke happening. I can’t remember the last time I heard of a flywheel breaking. Think of how many runs are made each weekend at drag races across the country.

Re: SFI flexplate mandatory in all v8s Jan 2024
 

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

Re: SFI flexplate mandatory in all v8s Jan 2024
 

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

Re: SFI flexplate mandatory in all v8s Jan 2024
 

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

Re: SFI flexplate mandatory in all v8s Jan 2024
 

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.

Re: SFI flexplate mandatory in all v8s Jan 2024
 

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.

Re: SFI flexplate mandatory in all v8s Jan 2024
 

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.