accelerator pump Q..

[hardtimes]

Originally Posted by Ronnieroadster

With a single carb having no accelerator pump there will be a huge off idol stumble making it near impossible to drive the vehicle. Any attempt to try and gain acceleration without the pump enrichment will be meet by a much bigger stumble.

Hey Ronnie,
So, in such case, use of a choke would gain no improvement ? How about timing, as in would some advance not gain improvement either ?

[Ronnieroadster]

Originally Posted by hardtimes

Hey Ronnie,
So, in such case, use of a choke would gain no improvement ? How about timing, as in would some advance not gain improvement either ?

A choke working correctly will reduce air into the carb allowing A richer mixture and also raise the curb idel at the same time if the linkage is adjusted correctly. Without the air the choke has reduced the engine will have a hard time performing correctly. Additional advance at times will help gain performance but only if the fuel mixture is rich enough to reduce pre ignition. No benefits can be gained with those two ideas.
The only two barrel carbs I know of without accelerator pumps are the secondary carbs used on factory tri power assembly's. Those factory systems work extremely well but all three carbs are designed for the purpose.

[hardtimes]

Originally Posted by Ronnieroadster

A choke working correctly will reduce air into the carb allowing A richer mixture and also raise the curb idel at the same time if the linkage is adjusted correctly. Without the air the choke has reduced the engine will have a hard time performing correctly. Additional advance at times will help gain performance but only if the fuel mixture is rich enough to reduce pre ignition. No benefits can be gained with those two ideas.
The only two barrel carbs I know of without accelerator pumps are the secondary carbs used on factory tri power assembly's. Those factory systems work extremely well but all three carbs are designed for the purpose.

Hey Ronnie,
Thanks for this information and ideas. So, multiple carbs make a difference, more so than a single ?