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Old 06-18-2023, 08:23 AM   #1
Billy Nees
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Default Re: SFI flexplate mandatory in all v8s Jan 2024

Now just to be "fair", this ruling is going to apply to all V8 bracket cars also right?
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Old 06-18-2023, 09:30 AM   #2
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Default Re: SFI flexplate mandatory in all v8s Jan 2024

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Originally Posted by Billy Nees View Post
Now just to be "fair", this ruling is going to apply to all V8 bracket cars also right?
2023 NHRA RULE AMENDMENTS

Beginning January 1, 2024, SFI 29.1 flexplate mandatory on all V-8 vehicles. Any car running quicker than 9.99, SFI 29.1 automatic transmission flexplate and SFI 30.1 flexplate shield mandatory. See General Regulations 2:12, 2:14.
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Old 06-18-2023, 11:20 AM   #3
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Default Re: SFI flexplate mandatory in all v8s Jan 2024

Having repaired several racers cars after a flexplate explosion I cannot understand why anyone would be against this rule which should have been in place years ago.
I've seen headers sliced off, frame rails cut in half and floors with shrapnel sticking thru within inches of the drivers feet. . Not to mention the possibility of severe injury to track personell or even your crew menbers.
Jim Bailey is correct . the 2 step is well known for causing other issues like broken oil pumps and pickups..
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Old 06-18-2023, 11:49 AM   #4
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Default Re: SFI flexplate mandatory in all v8s Jan 2024

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Originally Posted by Chevy55 View Post
2023 NHRA RULE AMENDMENTS

Beginning January 1, 2024, SFI 29.1 flexplate mandatory on all V-8 vehicles. Any car running quicker than 9.99, SFI 29.1 automatic transmission flexplate and SFI 30.1 flexplate shield mandatory. See General Regulations 2:12, 2:14.
Yes..Okay.
So how does that apply to U/SA 273 Mopars?
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Old 06-18-2023, 01:10 PM   #5
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Default Re: SFI flexplate mandatory in all v8s Jan 2024

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Originally Posted by Mark Yacavone View Post
Yes..Okay.
So how does that apply to U/SA 273 Mopars?
or to a 267 chevy U/SA ?
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Old 06-18-2023, 01:30 PM   #6
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Default Re: SFI flexplate mandatory in all v8s Jan 2024

A Mopar flex plate barely extends a 1/2" beyond the bolt circle of the converter, if it explodes it's because the converter exploded otherwise not really possible.
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Old 06-18-2023, 03:21 PM   #7
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Default Re: SFI flexplate mandatory in all v8s Jan 2024

Billy , Just mark your tech card with the ATI 400 Pontiac model.
If anyone asks , I'll say I saw you put it in .
I'm sure you will anyway..it's only a deuce , plus re-balancing
Still not sure if you can add or take away weight on an SFI approved flex.
Anybody?
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Old 06-18-2023, 03:37 PM   #8
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Default Re: SFI flexplate mandatory in all v8s Jan 2024

I have always used a SFI wheel. Just thought it was a good idea.
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Old 06-18-2023, 04:00 PM   #9
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Default Re: SFI flexplate mandatory in all v8s Jan 2024

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Originally Posted by Mark Yacavone View Post
Billy , Just mark your tech card with the ATI 400 Pontiac model.
If anyone asks , I'll say I saw you put it in .
I'm sure you will anyway..it's only a deuce , plus re-balancing
Still not sure if you can add or take away weight on an SFI approved flex.
Anybody?
You CAN...
I have in the past... (removed weight for balance)
Honestly never gave it a thought, just part of building a motor...
Will it recertify?
Don't know...
THAT is the true question...
Hmm...
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Old 06-18-2023, 05:54 PM   #10
Billy Nees
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Default Re: SFI flexplate mandatory in all v8s Jan 2024

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Originally Posted by L.Fite View Post
You CAN...
I have in the past... (removed weight for balance)
Honestly never gave it a thought, just part of building a motor...
Will it recertify?
Don't know...
THAT is the true question...
Hmm...
Soooooooooooooo, "You CAN..." but can you LEGALLY?
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