where can I find a dash pot for my 1970 442 455?
thanks

 

Find a good used one on any number of salvage yard Olds motors and refinish it. Make sure and get the nut that serves as a jamb nut against the bracket. Do you still have the bracket that the dashpot mounts on?

 

yes, the old one is still on the car. I have ried some local salvage yards with no success. I am also looking for the plastic vent that connects the 2 vent lines on the passenger side of the gas tank to the main vent line that runs to the engine....
thanks for your help

 

On your other thread for the vent tube ("surge tank").....posted there also..Parts Place, and other vendors sell this piece repro.

 

if you have a cutlass then check with yearone.com they might have them. or you can go to nosgm.com thats where i got mine. chris

 

Okay, I finally have to ask this dumb (but related) question..

What is a dashpot??
I have one on my 72's 350. There is no vac line or electrical connection, nor are there provisions for them. It looks like an idle controller but is does nothing. It is more like a spring loaded plunger and my throttle linkage does not even touch it.
What is its "magic" function?

 

a dashpot's function is to slow the rate of throttle valve closing. it only functions near the fully closed throttle position. it was used to help prevent stalling when you hit the gas and let off right away, like in rush hour traffic when it's "gun the engine-hit the brake". with a moderately skilled driver-it's not needed.



bill

 

If you adjust the idle for hot running, it will idle fastest at its hottest temp.

Which leads to partial open throttle run on when you shut the car off. The

dash pot should back off the idle setting as the vacuum disappears .

 

The dash pot being discussed, does not use vacuum.

BILL DEMMER's description is accurate.

Norm

 

Well I need one for preventing run on ...

I'll have to fake it ...

 

then you need an "anti-diesel solenoid". it is electrically operated and is powered whenever the key is in the "run" position. the curb idle speed is set by the nut head on the end of the solenoid plunger. the carb. idle screw is set to a barely running speed(usually about 400 rpm).


bill

p.s. if you want to try to "fake it", set your curb idle speed 50-100 rpm below factory spec. the idle quality will likely be worse though, and you may suffer from a hesitation upon acceleration.

 

Thanks. I'd rather not fake it. Where can I get an Anti-diesel solenoid.