Header Retention Rule Revision

[FED 387]

Signman---Please reread the rules again # 2 is the only option---- #1 no longer a valid way of securing them per NHRA rules---If it has a removable collector it will have it secured by the following means (your choicepick one of the 3) weld/tether/body mount that's it!! FED387

[gsa612]

Originally Posted by gsa612

Now there's a grey area in the definition of the clamp and hanger lol..I was thinking of using a 3 1/2" SS t-bolt clamp on the collector,with a piece of metal strapping to the clamp bolt,and the other side bolted/screwed to the floor.I wonder if that would be acceptable?.What a cluster**** NHRA!.

My collectors are bolted to the pri.tubes with a tabs (the old fash.way).I was going to make a "tether" ^^ with a clamp and straps to the floor.Unless I'm misunderstanding the revision,it seems like it would pass?.

[prixmoracing]

Originally Posted by FED 387

Signman---Please reread the rules again # 2 is the only option---- #1 no longer a valid way of securing them per NHRA rules---If it has a removable collector it will have it secured by the following means (your choicepick one of the 3) weld/tether/body mount that's it!! FED387

Reread what he said and he is correct, 1: you need to use the current tabs/springs/bolts to secure and then in conjunction with that 2: one of the 3 now allowed options (tether or weld or Bolt/Mechanical fastener to frame)

[jmcarter]

Originally Posted by gsa612

My collectors are bolted to the pri.tubes with a tabs (the old fash.way).I was going to make a "tether" ^^ with a clamp and straps to the floor.Unless I'm misunderstanding the revision,it seems like it would pass?.

No, must be approved design. See the NHRA accepted parts list for ones that NHRA has approved.

[FED 387]

Prixmo---- you can use bolts/tabs/springs if you WANT to but you MUST use either a 1/2inch stitch welds/NHRA approved tethers/some type of device to bolt the collector to the body---I gaurantee you, you show up without a welded/tethered/or hanger bolted to the body collector you're gonna get bounced

[gsa612]

Nhra:

[prixmoracing]

Originally Posted by FED 387

Prixmo---- you can use bolts/tabs/springs if you WANT to but you MUST use either a 1/2inch stitch welds/NHRA approved tethers/some type of device to bolt the collector to the body---I gaurantee you, you show up without a welded/tethered/or hanger bolted to the body collector you're gonna get bounced

You are wrong about your if you WANT to use bolt/spring/etc because that is the primary attachment. and that is required. Here is the rule.

"Secure the collectors/stacks with an NHRA-accepted header tether.

· Secure the collectors/stacks with a minimum ½” (half-inch) stitch weld located on each primary tube.

· Secure the collectors/stacks by permanently attaching them to the vehicle body or frame with positive fasteners such that they require tools for removal.
Please keep in mind that the attachment methods listed above are meant to be a secondary method of attachment. All factory attachments, such as springs and/or bolts, must remain in place."




Now slowly reread what both of us said, you need to use the original coupling devices (bolts/springs) and one of the 3 now approved tethering methods. Neither of us said you don't need one of the 3 approved tether methods.

[buzzinhalfdozen]

OK getting clearer....clear as mud.C and W racing, OK thanks maybe not considering the tabs and fasteners is where I was getting hung up...I will address this on my car before the first race. Suppose I've got a bit before I have to make a move. Merely the fact that there seems to be so many different interpretations of that 1 paragraph would indicate 1 english may not be everyones first language or...and I'm leaning this way, they could have done a better job on the "clarification". Joe

[ken robinson]

signman my set up was legal the whole time .....bob too .........wow

[Dan Fletcher]

The clarification didn't clarify much to me. I still have no idea if a normal race car set up consisting of 4 primary tubes with a 4 into 1 collector that has 2 tabs with 1/4" bolts like 90% of us have is eligible for an Advance Auto muffler clamp and hanger.

What I do know is that the Collector Tethers that I ordered came on time and fit perfectly. Fitting perfectly might not sound like much, but I had very specific dimensions with no real margin for error. Moreover, I took them on an airplane with me to Cali, so if they were wrong I was pretty much screwed.

I think this has been the most overblown deal I've ever seen. It's not like they're saying you have to buy new ones every 2 years, it's a one time deal. Mufflers were worth fighting about, this is not, IMO.