[Spridgets] Rejetting carbs for high altitude

[Kathryn Bales]

I'm terribly sorry, but there is no way that a Lotus 7 can successfully 
operate at your altitude. An easy solution would be to send the car to 
me, as I live at a lower altitude.

Kate

JLC wrote:
> Thanks to Roan Soave and WeslakeMonza1330 for replying...
>
> I could not remember if the ignition had to be retarded or advanced for high
> altitude... Could you explain to me why it has to be advanced? I am running
> at 25 degrees advanced at idle, 35 at 4000-45000 rpm. I'll try 28 and 38. 
>
> I know it's running too rich because I can see the "black soot" from the
> side exhaust on the rear left fender! Did not used to do that... in fact,
> the original setting by the engine rebuilder was on the lean side, and I
> should have left it there. I had the car dynoed in San Diego, and it was
> running somewhat rich after that, even at sea level. According to the dyno
> graph, the air/fuel ratio varied from a low 11 to 1 at 3000 rpm to a high
> 14.4 at 2000 rpm - it was 13.1 at 6297 (max power with 115 hp at rear
> wheels).
>
> I am running NGK BCP 6ES plugs - will try two grades hooter for the same
> plug.
>
> I will buy an airflow meter... I can use it on another car too. Any
> suggestions for a good one at a reasonable price?
>
> Thanks again,
>
> JLC
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