JBM

iTrader: (15)

I'm setting up my new motor using an accufab 4500 TB, and have brackets to mount n20 solenoid and throttle cable to the intake. There is a return spring mechanism on the bracket that I'd like to cut off, but I was told I need two return springs per NHRA rule book. Is this one of those rules that is never checked, or does the stock pedal return along with the TB spring fullfill that requirement? Thanks.

mdacton

iTrader: (3)

they always checked me for both, I just had one of the billet cable/return spring set-ups. I had a 4150 flange but they mak 4500 also

Villain281H

iTrader: (5)

Correct, two springs needed on a carb or TB.

tee-boy

iTrader: (8)

JUst in case one gets stuck and you can't get the motor out of gear.

seen it happen.

jmill96Z

iTrader: (3)

My tech guy is **** as hell. He tried to tell me I had to have 2 on my STOCK OEM TB. This rule is meant for carbs. In fact the IHRA book says carbs. I could see putting 2 in a 4150 TB just to get the guy off your back, but on a stock TB?

tee-boy

iTrader: (8)

common sense tells me if it were that big of a deal, someone already would have produced and marketed one of these.

ShiznityZ28

iTrader: (11)

I have been checked for both. the 4500 tb feels real light withonly 1 the 2nd feels better.

studderin

iTrader: (28)

my 4150 tb has a clock spring on the shafts under the linkage, dose that count as one, so i just nee one external.

jmill96Z

iTrader: (3)

shaft mounted springs do not count

ryarbrough

iTrader: (18)

I put two on mine... Friction in the cable liked to hang it open with just the internal spring, and I figured I might as well be legal if I was going to add an external spring.

JL ws-6

iTrader: (50)

I'd just put the 2 springs on and be done with it, no need to have a headache if you don't have to.