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I am running 8896-2 on the street. 500' 440-3 intake. Idle and midrange runs eye burning rich. I am running a progressive linkage and front butterflies open 1/3 before the rears start to open. Carb originally came with 1 to 1 soft progressive.I am running a 4.5 power valve in the front. plug in the back. Found my number 1 & 2 spark plugs black, back six are brown. Idle screws all 4 are set for highest vac. Could using a power valve be causing this? I have an air bleed assortment but have not changed anything yet. Wide open jetting is close. Its idle to about 3500 thats rich. Timing is at 36, have tried it all over the place, it seems to like 36. I am running an aftermarket 10degree bushing in msd with light springs. Idle timing is 26. Galen



Ran the same carb on my old 496. I found that the transfer slots were feeding too much fuel. That's a 3 circuit carb so as soon as you get into cruising rpm the transition tubes start to feed fuel making it too rich. I drilled the transfer holes bigger in the main body and hammered in a brass air bleed and opened up the hole to about .082".

I ran a power valve. Since the carb has no vacuum port you will need to rig something up to read your idle/cruise vacuum and set up the power valve accordingly. I blocked the rear power valve off and jetted up accordingly.

Start with air bleeds up to stock to start. You may want to lean the idle and transition circuit slightly leaner.