I know this thread is old but I am intrigued by this. Doesn't the stock Interceptor carb have an accelerator pump on it? If so then this is probably the reason the stock carbs work better. The pump gives it the extra shot of fuel it needs to make a smooth transition from idle to mid range. I think that while the pilot jet and idle mixture are fine for idling on the 38mm carbs they are too lean to make a smooth transition to higher rpms. I think that experimenting with different jet needle tapers and/or a bigger pilot jet might solve the problem.
I'll probably find out if I acquire a wreaked Interceptor next month. Hopefully.
Topic: #553 (Read 16802 times)