As regular readers of my troubles will know (oh how I've been looking forward to starting a thread with hose words...) my car will not run under load for more than 20 minutes before cutting out.
As part of the fuel system strip, I found that there is a lack of gaskets by the previous owner/garage. The car would run at idle very nicely and pull well until it cut out. Altering the setting of the idle mixture jet had little effect on running.
Under load and when warm, pressing the accelerator will cause the engine to cut immediately. If I am lucky it will then just about idle but most often cut out and need a long cool down.
The primary and secondary main jets are slightly blocked too.
Anyway, to the main point of this thread: I now see that the main primary jet has been increased numerically from 107 to 110. I assume that related to an increase in the orifice diameter and thus allows more fuel to mix with the same volume of air and so enriches the mixture.
Do the experts on the forum think that the increase has been (lazily) made to counteract the inevitably lean condition that the lack of carb base and intermediate gaskets will have caused, OR is the increase now a usual modification to deal with today's different fuel?
Is it worth going back to the 107? car is standard tune 1500. emissions and fuel econ are more important to me than "sporting performance"...
cheers
RDS
As part of the fuel system strip, I found that there is a lack of gaskets by the previous owner/garage. The car would run at idle very nicely and pull well until it cut out. Altering the setting of the idle mixture jet had little effect on running.
Under load and when warm, pressing the accelerator will cause the engine to cut immediately. If I am lucky it will then just about idle but most often cut out and need a long cool down.
The primary and secondary main jets are slightly blocked too.
Anyway, to the main point of this thread: I now see that the main primary jet has been increased numerically from 107 to 110. I assume that related to an increase in the orifice diameter and thus allows more fuel to mix with the same volume of air and so enriches the mixture.
Do the experts on the forum think that the increase has been (lazily) made to counteract the inevitably lean condition that the lack of carb base and intermediate gaskets will have caused, OR is the increase now a usual modification to deal with today's different fuel?
Is it worth going back to the 107? car is standard tune 1500. emissions and fuel econ are more important to me than "sporting performance"...
cheers
RDS