nhrda flexplate rules?

T

Todd W

Comp Diesel Sponsor
Joined
Nov 18, 2006
Messages
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To all those going 9.99 and quicker please help me understand the ruling.

per nhrda rules
SFI 29.1 flexplate / 30.1 flexplate shield (AT equipped cars

Link to said rules
http://www.nhrda.com/Rules.php

Does this mean you need either a 29.1 flexplate, or a 30.1 flexplate sheild? Or does it mean you need both of these items.

If it means you need both where are people finding sfi flexplate shields for the dodge 47/48 transmissions.

I have done a compd search and some google searching and have found nothing. Lots of sfi 4.1 trans blankets and bellhousing blankets but nothing that is sfi 30.1
 
I am happy to do both, just can't seem to find a way to.

Any ideas on how to get a sfi 30.1 flexplate sheild for a 47re?
 
Todd W said:
I am happy to do both, just can't seem to find a way to.

Any ideas on how to get a sfi 30.1 flexplate sheild for a 47re?
Click to expand...

Build your own from scratch or modify a off the shelf one for say a tf727 and send off to be certified once you are satisfied with fitment.
 
In may of 2013 I sent an e-mail to NHRDA that said "In the rules it states “SFI 29.1 flexplate / 30.1 flexplate shield”

does that mean we need both? or just one?"

Jason Murray wrote back and said "just one"
 
kc8yhk said:
In may of 2013 I sent an e-mail to NHRDA that said "In the rules it states “SFI 29.1 flexplate / 30.1 flexplate shield”

does that mean we need both? or just one?"

Jason Murray wrote back and said "just one"
Click to expand...

awesome, thanks a lot.
 
From the NHRA rulebook, General regulations 2:14
9.99 or quicker E.T. cars, and
135-mph or faster E.T. cars using an automatic transmission,
Lenco Drive, or BRT must be equipped with a flexplate meeting
SFI Spec 29.1 and covered by a flexplate shield meeting SFI
Spec 30.1
 
kc8yhk said:
In may of 2013 I sent an e-mail to NHRDA that said "In the rules it states “SFI 29.1 flexplate / 30.1 flexplate shield”

does that mean we need both? or just one?"

Jason Murray wrote back and said "just one"
Click to expand...

Jason must have not been paying attention, this is NOT correct. As noted above they are both required for NHRA rules.

I wonder if one of these would fit a diesel Dodge trans?
http://www.jegs.com/p/Quick-Time-BellHousing/Quick-Time-Flexplate-Shields/1324811/10002/-1

Having seen the effects of a flexplate coming apart, it is definitely something you want to have! My race truck has both an SFI rated bellhousing AND a separate shield.
 
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