From what I have read, my Weber 32/36 is running to lean. My biggest problem happens when I open both barrels at once,it bogs and backfires. Is this a lean conditon? It did not do this with the Carter. I read a post where the said excessive fuel pressure could do this, that seams like a rich condition. I pinched off the fuel line and it did the same thing. My Weber was on a 4cyl ford. If in fact it is running to lean , can I ream the jets out a little? a friend of reamed the jets on his sisters Harley and it worked great. The way I look at it is, I have nothing to lose since I will be throwing them away if I buy bigger jets. I have a 258 with hei and a header, it had a lot of power with Carter, it just idled like crap.