I just replaced my rusty, cracked, and leaking exhaust system with fenton headers, dual exhaust, and carb heat plate. I used glass packs to conserve on space under the bus. I plan to keep the single carb setup for hopefully better economy.
Other than that annoying ticking from the exhaust leaks, it ran, and idled well before the modification. Now it seems to take more choke for a longer amount of time during warm up. Once it's warmed up and the choke is off, it has a wandering idle that takes 5-10 seconds for one cycle. The vacuum advance on the distributor rotates it in sync with the idle.
I finished it last night, and then drove it 40 miles home from my Dad's place, so I haven't spent a lot of time sorting it out yet. It runs great on the highway, and seems to have more power which is a positive by-product of the modifications. All I have done so far is to open the idle mixture jet a lot, which seemed to bring the idle up enough to run. The idle set screw is already maxed out at high idle. I'm suspecting that a vacuum leak might be the cause.
I figure I have way less back pressure than before, and wonder how I might compensate for that.
Any suggestions guys?
