Carb question

[Laldog]

I'm still working on getting my Weber equipped 32/36 DGAV) coupe to at least start and idle without sounding like the Fourth of July.

Before I start hunting down fuel issues, can I expect the engine to run somewhat smoothly after setting the distributor and carbs using "static adjustments" (lining up distributor marks at TDC and adjusting fuel air mix to "factory default" settings (2 turns out from dead stop/fully seated)?

Thanks.

 

[echappe]

I went through this a year ago with 3.5 engine swap and 38 webers. Is it backfiring and spitting through the carburetors? Were these carbs on the car previous to this and was it running OK? Make sure the timing chain is dead on top center and then look at the carb jets

 

[61porsche]

Yes,

you should expect that it will start. maybe even back the adjustment out to 2.1/2 turns. If the car hasn't been started for a while or your carbs are bone dry, try pouring a few tablespoons of gas down each carb first. May take a try or two, then the engine should run long enough to fill the carbs back up and somewhat smooth out.

How smoothly is subjective.

It would be ok for it to start and run faster till it warms up. The go for timing first and dwell before trying out the carbs adjustment.

Flame out the carb or spitting is lean. Exhaust means way too rich.

 

[Laldog]

backfiring through carbs....

Yes. A few days ago, I had it running sweet and smooth, with only a high idle speed to be resolved.

Unfortunately, I left it unattended for a minute, and my buddy "mechanic" decided to go at the Webers with reckless abandon. Needless to say, I haven't had much luck since then.

They are backfiring through the carbs, so at least I know it may be a lean condition.

The engine was transplanted from a fuel injected model, so it has an electric fuel pump with the required fuel pressure regulator.


Thanks for the helpful comments.