The carbs are backfiring? Backfiring through the carbs is usually
caused by too lean a mix. Did you just build this engine? Check your
firing order... I know I know, but the first time I built my U20 I was
convinced that I had a carb problem (had solexes)... I tried everything,
even got it to stop spiting much and ran the car to 80 mph. My
mechanical engineer friend and I were staring at the car, trying to
figure out what was wrong, when the guy who was teaching me body work
came by, asked what the firing order was, and promptly switched my
wires... VAROOOMMMM! Man, did we feel stupid. Firing order is 1 3 4
2... just in case!
Greg Burrows (I are a mechanic...)
Marko Lahtinen wrote:
> My car has the su carbs for a 1600 attached to a
> stroked R16 motor. I am having some difficulty in
> getting it run right - among the problems is it runs
> rich, and richer at the front two cylinders (fouled
> plugs). (I have now got the extractors and the carb
> manifolds to seal so backfiring is mostly gone).
>
> One of the things i want to check is what needles are
> in my carbs. How do I do this? What needles should I
> have?
>
> Thanks in advance
>
> Marko
> 64 1500 w R16
> Sydney
>
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