yep, sure as sh?t, sorry i should said it "bogs down, and backfires, coz if lean mixture

are you sure your points/spark is good

my carby has the following.

idle jets : 55/8
emul tubes: F2
airs : 185
mains : 145
a/v : 3.5
chokes : 32
pump jets : 55

carb is not new, i put a kit through it, gaskets, ect
im not sure what it is jetted to suit, soo, yeh....

Is the carb new?

this is just a new setup, i havnt had it running much, seems to idle fine, but just breaks down/backfires, when the foot it put down, when free reving and under load.

I can work out some baseline settings for you tonight when I get home.

What jets, chokes etc. are in there now?

Is it a new setup or has it been running for some time?

I have a L20 turbo with a drawthrough 45dcoe hanging off the front. it has a nasty flat spot, just off idle. could some one please share some info about jets, emul tubes, etc, for a single weber on an L20 possibly try a Na L20 jets setup for a starting point, just so i can get the thing to rev...then make adj from there.
any info is greatly appreciated!