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If you are going to tune and tinker AVS. For a full built, all out race carb? AFB might be easier to Frankenstein. I have heard of NSS stick shift guys removing the counter weight butterflies all together. They launch at such rpm you don’t need secondary enrichment for the secondaries. Like a...

I fought a similar issue for a year. I feel your pain. I found the flare on the vent tube closed the tube down to less than 1/16” among other things. Finally put a holly red pump at the tank and a big mechanical up front. The red also makes starting it nice after the fuel evaporates out of the...

So it was leaking at the bowl inlet? You may still have issue if the float level is going up from where you set it. If you set it at halfway and you see it creep to the top. You should address that. If it creeps up while idling it can come out of the boosters and vents and pour into the motor...

So, what I have found pushing the AVS pretty far out of its comfort zone, in a race car. is in some circumstances it likes being fat in front. What I mean is say your total fuel load is now a step rich in the front and in the back. Try going two steps rich in front and the stock setting in the...

I have been playing with a 800 avs for a while and am really pushing it beyond its comfort zone. Not sure what info will be helpful, most of this won’t help you, but some interesting things I have noticed. The base casting on the AVS is the same as the base casting on the AFB/performer...

I’m sure it was mentioned,but you can fill the carb through the carb vent, unhook the output of the fuel pump and put it in gas can. Start car which should run a bit, see what comes out of the pump. You can try and prime it this way, but leave the line connected. You may have to do it multiple...

I have an 825 mighty demon and got it new on my stroked 408. I have had to take it apart three times to clean metal shavings out of it. The quality of workmanship was horrible. I would not recomend anything made by Barry Grant. That being said once you clean it out and tune it, it works very...