NHRA 2013 Rules Amendments

[CMcAllister]

I assume this is over and above the normal tabs, bolts, and/or springs typically used to attach the collector to the primaries?

[FED 387]

And the cost of these will be ??? can we fab our own or do they need to be a purchsed tether???

[Stewart Way]

May be just me but most of the time NHRA ammends a rule, it is a little hard to understand and sometimes gets a rewrite. My problem on this one is, the Multi-piece exhaust collector wording. Most collectors I have used are one piece. I have used primary tube extensions but I don't think that is what they are refering to. What exactly is a multi-piece collector?

[FED 387]

I personally believe they are referring to anything AFTER the primary tubes, ie. extensions , collectors etc ...Instead of just shoving the collector on to the extensions they really are not or nothing is fastened to the primary pipes--they want to make sure that the tubing from the header flange to the tip of the collector is one piece such that at no time can any portion of the tube(s) comes apart unless/until it is unbolted from the previous part.--Makes sense to me--- FED387

[Stewart Way]

Think you are right. I remember collector extensions that were slip on but every collector I have had bolted on to 2 primary tubes. I see some stainless ones with spring attachments. Just too many words to say "collector". We know what they are saying but why not just say collector, not multi-piece exhaust collector? But Mr Tech Man, I don't need them because I have a 1 piece collector, not multi-piece. I was an NHRA tech man for years and this is what causes problems. Poorly worded rules or should I say wording open for arguement.
And are these really better-safer. Both do the job if they are secured but neither if they are not. I'm just being picky I guess.

[SST159]

So if your collectors and primary extentions are bolted to the primary tubes, are you still required to have this retention devise?

[JThomas]

I remember someone losing a collector on a S/C dragster at the 90 race last year. Who was that?

[Stewart Way]

Gary
Don't be so sure. It says a removable collector must use an NHRA approved tether. Being bolted in doesn't make it non-removable. Your using logic again.