Throttle Limiters

[SSDiv6]

Many years ago, NHRA was looking at the wiring of the Idle Stop on Quadrajet carburetors. It appears some racers found a way to use it as a throttle limiter by using a toggle switch.
As I stated earlier, racers are creative and there are many ways to skin a cat. (Sorry Cat Lovers... )

[Rory McNeil]

Originally Posted by SSDiv6

Many years ago, NHRA was looking at the wiring of the Idle Stop on Quadrajet carburetors. It appears some racers found a way to use it as a throttle limiter by using a toggle switch.
As I stated earlier, racers are creative and there are many ways to skin a cat. (Sorry Cat Lovers... )

Considering the short travel length of the electric solenoid used for these anti run on throttle closing devices, if you are running quick enough to run index on less than 1/4 throttle opening of the primary side of a Quadrajet, I would have to think that is a very underfactored combination!

[e vassar]

Originally Posted by SSDiv6

Many years ago, NHRA was looking at the wiring of the Idle Stop on Quadrajet carburetors. It appears some racers found a way to use it as a throttle limiter by using a toggle switch.
As I stated earlier, racers are creative and there are many ways to skin a cat. (Sorry Cat Lovers... )

Is this the selenoid that opened the throttle a little when the AC was turned on,to maintain idle speed?
I knew a racer years ago that had one of these on a stocker,but I think he was using it for a staging device. Flip a switch and it holds the throttle open for you.

[B Parker]

Originally Posted by SSDiv6

Many years ago, NHRA was looking at the wiring of the Idle Stop on Quadrajet carburetors. It appears some racers found a way to use it as a throttle limiter by using a toggle switch.
As I stated earlier, racers are creative and there are many ways to skin a cat. (Sorry Cat Lovers... )

This was not a throttle limiter. I had a few friends about 35 years ago that would use this on a QJet. This would set your rpm you staged at. Hit the toggle switch and it would open your carb the same every run. For it to limit your throttle it would have to be on the other side of the linkage. BP

[SSDiv6]

Originally Posted by B Parker

This was not a throttle limiter. I had a few friends about 35 years ago that would use this on a QJet. This would set your rpm you staged at. Hit the toggle switch and it would open your carb the same every run. For it to limit your throttle it would have to be on the other side of the linkage. BP

Barry,

In this particular case, the guy had it rigged to limit the throttle opening and got caught. It was directly hooked to the throttle lever with a modified bracket. NHRA Tech made him remove it and took it away.