Carb Problems?? - Need Help

[wtm442]

You said "The car is flooding...you pull off the air cleaner and you can see it."

Is that when you shut the engine off you can see gas dripping down into the throttle bores? Still sounds like gas percolating in the fuel bowls to me, especially if you have had the same problem with two different carbs.

[hkelley]

Originally Posted by wtm442

You said "The car is flooding...you pull off the air cleaner and you can see it."

Is that when you shut the engine off you can see gas dripping down into the throttle bores? Still sounds like gas percolating in the fuel bowls to me, especially if you have had the same problem with two different carbs.

That's right. I think its a good chance this is the problem. I have not had this same problem before. With the 750 it ran real rich, was tough to start, etc. They put on the 870 and initially I still had trouble getting it started, but once going it was fine. Took it back to Olthoff to have them take another look at it and they found the vacuum advance was off and he changed the jets. Drove it home and it ran great for an hour and 15 on the freeway. After I was on surface streets, stop and go for about 15 minutes it started bucking and it has gotten worse every time I have driven it since then.

[hkelley]

Here are some more details if this helps.

10.5:1 Compression ratio
Edelbrock Performer 460 intake manifold w/Holley 870 CFM
SVO Cobra Jet aluminum heads with SVO valve train M-6049-B429
Polished valves - Intake diameter 2.25" & exhaust diameter 1.76"
SVO high performance hydraulic flat tappet camshaft M-625-C460
Valve lift - .588" intake & .614" exhaust
Duration at .050" is 244 degrees intake & 254 exhaust