Quote:
1200rallycar wrote:
in my experience this sort of thing is typical of weber carburettors, a full rebuilt and professionally tuned weber can only be expect to work well for 6 months before issues with gaskets, loose screws and jets, falling out of tune and cracked diaphragms.. had this many many times over the years
best option is the GX style SU's
Weber hater ha ha. From a Weber liker, all carbs require an element of maintenance from time to time. I fail to see how a change in fuel octane can result in the gasket being deformed, I guess it's possible, I would sooner believe the gasket failure was a result of ethanol content though. Either way I would suggest the poor ecomomy is due to the faulty gasket, incorrect jet selection and maybe the timing is not set to optimum. Worth also checking the distributor internals for correct functionality, i.e bob weights on the mechanical advance, dwell angle on the points and the vacuum advance diaphram on the side of the distributor.
Lastly, to take advance of high octance fuel in NA applications, you need to up the cylinder compression ratio.
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