Km/ gallon? Miles/ litre?

[Spider2]

Howard, happy to spend some time with you getting your carbs set up, either up there or down here in Westerham.
The engine needs to be really hot with the engine running so it's a job for a warm dry morning. I have got some spare idle adjustment screws as they are often bent or blunted from being overtightened to find the bottom position, inwhich case it is virtually impossible to get the mixture correct. Roll on Spring!

[lancialulu]

Howard, happy to spend some time with you getting your carbs set up, either up there or down here in Westerham.
The engine needs to be really hot with the engine running so it's a job for a warm dry morning. I have got some spare idle adjustment screws as they are often bent or blunted from being overtightened to find the bottom position, inwhich case it is virtually impossible to get the mixture correct. Roll on Spring!

Not sure but maybe Howard you have the later emission control carbs on your 3. More of a nightmare to adjust.

[HBG]

Spider2, thanks for your offer. When weather permits (bloody awful out there today!) I'd like to take you up on that offer and am happy to drive, unless you want to see the sights of North London?

I'll get a new air filter handy even though the current one may be just fine.

I'll get some photos of the carbs. Tim, are they visually identifiable? When the car was at Omicron much fiddling was done with the idle mixture screws and balancing was carried out. Presumably once off idle and driving along the  main jets are in play - are these adjustable and how would you measure the effect of any changes? Is this a rolling road job?

Thanks

[Neil]

My S2 1.3 with Dellortos and 123 ignition is averaging just over 34mpg over the last 3600 miles, it often does 38mpg or more on a long run on E5 fuel if available at a moderate speed, I would think you could get a few more mpg with yours.

[lancialulu]

Spider2, thanks for your offer. When weather permits (bloody awful out there today!) I'd like to take you up on that offer and am happy to drive, unless you want to see the sights of North London?

I'll get a new air filter handy even though the current one may be just fine.

I'll get some photos of the carbs. Tim, are they visually identifiable? When the car was at Omicron much fiddling was done with the idle mixture screws and balancing was carried out. Presumably once off idle and driving along the  main jets are in play - are these adjustable and how would you measure the effect of any changes? Is this a rolling road job?



Thanks

Main jets are really not "adjustable". Stick with manufacturers recommendation unless you are seriously tuning then increase by say 5 (but at expense of mpg!!). Main jet comes into its own after around 2500. Before the the "idle" circuit is managing the transition from idle to 3000. Some folk have found increasing the idle jet overcomes a hesitancy in this transition phase (blamed on modern fuel being thinner). I was one who fiddled around in this area and got convinced increasing the idle jet cured (almost) the hesitancy on my 1600. Then I looked at the valve timing and while near spot on it needed a tweak. After that the hesitancy went away and I dropped back to standard idle jets. Obviously if you up the idle jet this will slightly increase consumption. You need to check that the idle jets have not been changed (easy to do) - they should be 47.5. Your engine has non vernier camshafts so timing this will not be as accurate as the earlier vernier cams fitted to the 303 engine.

[HBG]

Neil, was that your Fulvia at Brooklands? Such a smart colour.

Attached is the emissions results from the MOT. I didn't witness the test as I was snoozing in the waiting room so can't vouch for their thoroughness. Not sure if it gives much away.

[Neil]

Yes that was my blue Fulvia at Brooklands on New Years Day, with the Augusta and Aprilia, some other cars were also there, yours must have been the red Fulvia near Concorde.