Car not firing on all cylinders

[rgh0]

Its not 'lethargic" driving its just that you do have to thrash the car on a track at a constant 6000 rpm for extended periods to stop the standard N7Y plugs from fouling with the standard Lotus jetting. The plugs are to cold and mixture to rich for any possible road use except perhaps touring on the German autobahns

regards
Rohan

[cliveyboy]

Rohan
I think you are right about the rich carb settings
I have never been able to understand the Lotus settings for my Dellortos They quote 120 main and 130 air corrector.
The dellorto charts I have read say the main jet is about right (4 x choke size) but the air corrector should be approaching 180. They also state you usually have a gap of about 50 between main and air jet as a good starting point for tuning (which tallies with the 180).
Unless I am mistaken the 130 air jet seems totally wrong.

Just out of interest a couple of guys I know who have rolling roaded their twincams both ended up with 110 main jets and when mine went in for a tune recently it was also mentioned that my 120 main jet was a bit rich

Clive