mario
woz there 45 dcoe 152 engine spec are 11.1 comp you know what cam im using. is gdub using same camshaft. and engine only idles good around 1200 to 1500 rpm does that seem right.
idle should be around 1200ish rpm. The jetting in Gdub's is different because the downdrafts get jetted differently.
Peterr has exactly the same spec as Gdub, another one of my engines, only fitted with 45DCOE13's and that is the jetting I started with on his engine with a 38mm cnc flowed choke. Even though your cam and comp are roughly the same, things like cylinder head flow have a dramatic effect on jetting. The other thing is that I'm 99% sure the progression holes on the DCOE152's are different to the 13's, so that will also have an effect on the jetting, in particular the idle's which may be why you're having problems.
As I said in my precious post, the way to tune a weber is to get the main, air and emulsion correct on a dyno, then the rest of the jetting gets done around that, and obviously the balance of the carbs and the float height is also most important. It is also important you use quality emulsions and jets, not the crap coming out of who knows where. The finish on some of the cheap emulsion tubes and jets is rubbish, and they don't work properly. I spent over an hour trying to work out a fault on the dyno with some spanish made webers only to find dags in the emulsion tubes. Fitted genuine weber ones, problem gone and the others binned (tried cleaning them, still not right).
So the first thing you need to do is fit your new fuel pump, check the float levels and balance, dyno it and jet your main jet pack correct, then start playing around with your other jetting to make it nice down low and at part throttle. The choke/venturi size you need should be decided on how much power it makes
The pump you need to use is a carter unit, with no reg.
this one
http://www.ebay.com.au/it...mp;hash=item3f1492bb1d Cheers
Woz