Two/three step wiring/functions(stick cars)IHRA!

Jeff Lee · 12-13-2007, 12:36 AM

I think NHRA doesn't understand stick racers are not the problem (perceived or real) with the two step buttons. Long travel buttons have no place in a clutch environment as you wouldn't want a delay in releasing the two-step after engaging the clutch disk which typically have a .035" to .075" air-gap. A 3" travel two-step button obviously has no place here. The problem you would run into is a two-step activating early or late as a result of a improper micro-switch adjustment. To early and the RPM goes to the next stage of the two-step and you hit the clutch engagement to hard. To late and the clutch engagement occurs on the two-step and their is less power at the crankshaft possibly causing too much slippage.
Stick racers should have a choice between running two switches (one for linelock, one for two-step) or tie both together as traditionally done (usually with a single button on the shift handle) as long as all wires are visible and easily traceable. I think NHRA doesn't understand stick racers are not the problem (perceived or real) with the two step buttons. Long travel buttons have no place in a clutch environment as you wouldn't want a delay in releasing the two-step after engaging the clutch disk which typically have a .035" to .075" air-gap. A 3" travel two-step button obviously has no place here. The problem you would run into is a two-step activating early or late as a result of a improper micro-switch adjustment. To early and the RPM goes to the next stage of the two-step and you hit the clutch engagement to hard. To late and the clutch engagement occurs on the two-step and their is less power at the crankshaft possibly causing too much slippage.
Stick racers should have a choice between running two switches (one for linelock, one for two-step) or tie both together as traditionally done (usually with a single button on the shift handle) as long as all wires are visible and easily traceable.
I'm copying this to Len Imbrogno. (Limbrogno@nhra.com)

terry1 · 12-13-2007, 10:03 AM

Well said Jeff.Hope you will keep us up to date on any correspondence that even has the "look"that some one is listening.Imagine the concept that an organization like IHRA listening to what members have to say.If it happens that they do listen,nhra might learn a thing or two from IHRA,woundn't that be something.
I like your coment about wiring out in the open for all to see.I think IHRA officals would sure rather do that than try to trace endless contacts on multi contact relays.

12-13-2007, 12:36 AM	#1
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: Two/three step wiring/functions(stick cars)IHRA! I think NHRA doesn't understand stick racers are not the problem (perceived or real) with the two step buttons. Long travel buttons have no place in a clutch environment as you wouldn't want a delay in releasing the two-step after engaging the clutch disk which typically have a .035" to .075" air-gap. A 3" travel two-step button obviously has no place here. The problem you would run into is a two-step activating early or late as a result of a improper micro-switch adjustment. To early and the RPM goes to the next stage of the two-step and you hit the clutch engagement to hard. To late and the clutch engagement occurs on the two-step and their is less power at the crankshaft possibly causing too much slippage. Stick racers should have a choice between running two switches (one for linelock, one for two-step) or tie both together as traditionally done (usually with a single button on the shift handle) as long as all wires are visible and easily traceable. I think NHRA doesn't understand stick racers are not the problem (perceived or real) with the two step buttons. Long travel buttons have no place in a clutch environment as you wouldn't want a delay in releasing the two-step after engaging the clutch disk which typically have a .035" to .075" air-gap. A 3" travel two-step button obviously has no place here. The problem you would run into is a two-step activating early or late as a result of a improper micro-switch adjustment. To early and the RPM goes to the next stage of the two-step and you hit the clutch engagement to hard. To late and the clutch engagement occurs on the two-step and their is less power at the crankshaft possibly causing too much slippage. Stick racers should have a choice between running two switches (one for linelock, one for two-step) or tie both together as traditionally done (usually with a single button on the shift handle) as long as all wires are visible and easily traceable. I'm copying this to Len Imbrogno. (Limbrogno@nhra.com) __________________ Jeff Lee 7494 D/S '70 AMX

12-13-2007, 10:03 AM	#2
terry1 Member Join Date: Sep 2006 Location: Moncton, N.B. Posts: 276 Likes: 24 Liked 24 Times in 13 Posts	Re: Two/three step wiring/functions(stick cars)IHRA! Well said Jeff.Hope you will keep us up to date on any correspondence that even has the "look"that some one is listening.Imagine the concept that an organization like IHRA listening to what members have to say.If it happens that they do listen,nhra might learn a thing or two from IHRA,woundn't that be something. I like your coment about wiring out in the open for all to see.I think IHRA officals would sure rather do that than try to trace endless contacts on multi contact relays.