[rooster]

I HAVE A EDELLBROCK STREET TUNNEL RAM SET-UP WITH 2 450`S THAT HAVE BEEN MODIFIED THEY WERE SET BY CAROLINA ENGINE HEAD ON A DYNO BUT SEEM TO BE TO RICH ON THE STREET (BLACK SMOKE)IF IT IDLES AWHILE BUT SEEMS TO CHECK GOOD ON PLUGS AFTER A COUPLE OF RUNS WHATS A EASY WAY TO ADJUST A 2 CARB SET UP!

[woodz428]

If it is just an idle problem, you can just adjust them,close them off and adjust them to the same setting. I'd start at about 3/4 turn and adjust them a little at a time to see if you can get it cleared up, be sure to adjust both carbs equally. My experiences tell me you should probably check manifold vacuum at cruise and see what power valves you have, sounds like the power valves are beginning to dump after an idling period.

[1BAD80]

This site has a lot of info on intakes and how they flow. I put a T hose connecting the carbs to keep the vacuum equal between the 2, I put it on the main large inlet and T off to each other and then to the PVC valves. I'm going to change it to just the 2 carbs and put 2 cover breathers on each Valve cover, it works better that way. I changed it when I built a 427 sbc thinking it would look better, but it sucks a little oil and in turn it puts deposits in the chambers. On my 406 I had 2 breathers on each and had no problem. On the hottrodders site woodz428 gave some good info. I think the hose will help quite a bit. You can jet down 2 sizes to help. Also check the throttle blades between the 2 carbs, to see if one is open more than the other. I had this problem on my cross ram. On the float settings I set them so you have to rock the car to get them to dribble the gas out and having the front a little lower than the rear because of acceleration.
Holly Carb site has a free downloadable manual and a trouble shooters guide which is very helpful.
I hope this helps you. If you take the bowls off check the power valves, use a hose and blow to see if their bad, I usually use 4.5 in all my carbs, and 99% of all the carbs like 3/4 turn out for the vacuum setting. A small air cleaner will make it run rich also. A K&N 6" X 2" will only flow 275 CFM according to K&N when I talked to them (FYI) . How does it run without any air filters on it, and what's the idle? mine is 550 rpm and I can put it down without any problem. I do get some black smoke once in a while but I found it was the rubber from the radial tires. I hope this helps you in some way.
Please stay in touch.
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