Discussion Starter · #1 ·
I just put a set of dart iron eagle 180 heads and a voodoo 268 cam in my 327. Previously had 461 stock heads and a 292 magnum cam. Now I just can't seem to get rid of this off idle stumble I have and sometimes it happens up to about 2000 rpm as well. I've tried a holley 600 and a holley 750 (both ran well on my prior set-up with no stumble at all), both are vacuum secondaries. They both stumble now! I've played with the timing, adjusted the accel pump to give more squirt, changed the plugs, new wires, and nothing has worked. After it stumbles, it accelerates very well. The wiring is in the correct firing order-18436572. Idles fine and part throttle is good, but when floored just stumbles for about 1/2 second, then hauls ass. Even when sitting in neutral and reved, the engine hick-ups right off idle, even with no load. I'm really starting to get frustrated. The cam was installed straight up with 4 degrees of advance built in. The sprocket dots were lined up perfectly. No vacuum leaks that I can find. When I open the throttle with the engine off, it seems that an adequate amount of fuel is squirted from the accell pumps. Could it be the heads or the cam? The heads have the 2.02 intake valves. I have 1.6 rockers on the intake and 1.5 on the exhaust (I read in David Vizards book that that can be worth some power). Could that be causing my problem? I just can't think of why BOTH carbs are acting the same???????