Holley 1946/C inferior to normal 1946?

[Anonymous]

Hi,
for my 1980 200 I bought a rebuild carb, a 1946/C for a 1981 car.

After a little figuring out (the fuel vent is a powered version and needs a live wire), I got it running very smooth. A lot better than that irragular running old one.

But I got a perfomance drop, around half gas it just stops being alive, it's getting there but not really sportive. No complaints about of-line power just everything above about 2000 rpm. The old 1964 was much, much, much, more healthier in that region.
I tried a larger jet, but no response. Accelator pump is working, no vacuum leaks found.

Should I go back to the old 1946? Where can I get a rebuild set?
Is there anything I have done wrong?

thanks,

Adam

 

[lightnin-boy]

The C stands for California. I don't know the differences beyond that, but it would be reasonable to deduce that it is engineered for lower emmisions than the normal 1946... and a result could be lower performance...


Kirk

 

[simon]

On a regular carburettor, I´d take a closer look at the main system: fuel enrichment at part throttle might not be up to par. Check the power valve body for proper function. Do you have access to a sniffer?

Some C and feedback carbs were built to maintain a steady air/ fuel ratio tailored to the needs of a catalytic converter, much different than regular ones. I don´t know too much about those modern late-model carbs though.

Carb kits are available at most parts stores; I get mine from eBay usually.