Topic: carburetor dashpot

[MattDoscher]

I have a 289 engine, autolite 4100 carb, C4 transmission and A/C in my '65 coupe.  Do I need a anti stall dashpot on my carb?  I currently do not have one and was wondering what purpose a dashpot serves.  The shop manual doesn't really describe what the purpose is only how to adjust it.  I did a search on this forum for dashpot and saw that one commentator had installed a hot idle compensator in the PCV valve line.

thanks,

Matt

[carlite65]

dashpot was only used with an automatic trans. its purpose was to prevent the throttle from slamming shut and possibly causing the engine to stall.

[bryancobb]

If you are stopped at a red traffic light, and the guy to your left takes off, and so do you.  Then you quickly realize your light is still red, and in a fraction of a second, you take your foot off the gas and stomp the brake.

This will almost always cause the engine to die... UNLESS YOU HAVE A DAMPENER (dashpot) to lower the throttle the last 5%,slowly. 

There was an OEM one on Ebay a few weeks ago for $38. 

[dave6768]

I drove my 67 for about 30 years without one without any issues.  I only recently added one to make it look concourse correct.  However, I did not see any difference when I added it.
Dave

[bryancobb]

I drove my 67 for about 30 years without one without any issues.  I only recently added one to make it look concourse correct.  However, I did not see any difference when I added it.
Dave

It's worthless it it ain't working.  If you have a WORKING one, and you have it adjusted right...IT"S SCHWEEEEET!

Rev the engine...instantly remove your foot off the gas...the RPM quickly goes to 900 and then S-L-O-W-L-Y eases down to a stable 600RPM idle in 2 or 3 seconds.

I bought 3 off Ebay, including a bad (new) one from Pony Carburetors, before I got a working one.  The working one I got was for an NOS 66 Chrysler product that was exactly like the Ford one except the threaded stem was longer.  I cut it on the lathe to the right length.
This is the exact one I bought  (Item #310309713437)  $50 Buy It Now.

[MattDoscher]

Thanks for the replies guys, I appreciate your insight.  I understand what your talking about Bryan.  Mine will do pretty much the same thing if I gas it real quick at idle the engine will just about cut off until the idle circuit catches up with it.  So I can see where a dash pot would help.