Smaller jet or larger exhaust?

[Caprimaniac]

Hi everyone. Guess it's quiet in the US at the moment, as it is here while this country is coverd in snow.

But I'm doing my homework watchin "GT Racer" at one of those cable channels and planning the steps to take as soon the ice melts.

My webers run quite well now; and I'm considering the problem with an over- rich blend at very small throttle opening followed by gently og hard acceleration, to be related to the accelerator jet- system only. I have very rich blend; AF about 10-11 and black smoke when accelerating from 1500- 2000 rpm. These are 48 IDF's.

An old carb- guru over here told that the way to cure this was to get a smaller accelrator pump jet. I have now a 50 jet. Redline once told me to go with a 40. OK; that will reduce the rate of fuel from the pump.

But what about getting the exhaust (bleed) larger? It is now closed, size 000. Open it up will give a smaller total amount og fuel expelled in one stroke.

I am tempted to say that reducing the jet is the way to go: Instant volume will be reduced. The stroke will last longer, also giving a little extra while opening up at higher revs?


Anyone wants to say something about this?