Hesitation when accelerating from stop - Holly 1901 carb

[mfirth]

Merc Cruzer, glad it was a simple fix. Merry CHRISTmas to you !
Will you take us for a spring ride, or a top down in the snow...jingle bells.......

[Merc Cruzer]

Originally Posted by mfirth

Merc Cruzer, glad it was a simple fix. Merry CHRISTmas to you !
Will you take us for a spring ride, or a top down in the snow...jingle bells.......

Have a Merry Christmas and a Happy New Year. Be safe out there.

What I need is a big snow storm and then I will put the top down and take it out. Usually after a big snow storm we get really nice blue sky and warmer days. And the roads dry off quickly.

I will put it on the list.

[Merc Cruzer]

Removed the blanking plates under the heat risers, and that changes the sound of the engine. The carb is allot warmer to the touch too, ie: warmer gas going into the intake.

Changed the plugs to two steps colder. I had been using hotter plugs as a temporary fix for the over rich situation.

The temp was in the high 60's today. The car seems to have more power and is smoother. Could be the higher air temp. To the point I found myself dong 70 in a 55 zone. (you have all seen the highway I use in the videos). Thing is, I wasn't passing anyone.

The plugs look great. Temp is supposed to be in the 60's again tomorrow, so a few more test runs and then I think I can call it a day, for this tuning session.

Thank you all again for you help.

[Merc Cruzer]

Turns out the vacuum advance was leaking. I think it was the original one that came with the car. Once replaced, it made a big difference in initial acceleration, higher speed acceleration and overall power.

[RalphG]

Originally Posted by Merc Cruzer

Turns out the vacuum advance was leaking. I think it was the original one that came with the car. Once replaced, it made a big difference in initial acceleration, higher speed acceleration and overall power.

Interesting. I should check mine. It is at least 50 years old. Possibly more.

[Mart]

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When you've only got vac advance, it's even more important that it works. I had an inop vac advance on the French motor in my 46 coupe and it caused overheating problems on longer journeys.
(French motors have vac only distributers).

[Merc Cruzer]

I just disconnected the line from the carb and put a rubber hose on the end of the line and sucked on the hose and used my tongue to stop the end. The arm would go back slowly.