Reply to "Weber carbs - owners speak out"

panteradougMember

I don't know on that one. I would think that the proportion of the fuel to air (140/160) would never change. I suspect that you step down the size of the main fuel jet. I wouldn't think that you would ever go smaller then a 125 fuel main.
You may have to bring sizes from 125 up. I wouldn't go over 140 mains.
I don't know if you have to change the emulsion tubes. You may.
I know that the f7s the carbs come stock with is a leaner tube at higher rpm then the f5.
Count on running 65 idles, bring a set of 60's too.
If you have to change the emulsion tubes also, then you are really screwed.
I never ran at high altitude. This is a shot in the dark for me.
You could talk to Larry at Pantera Connection. He runs Webers in his race car and may have run the Silverstate.
If not get there a week early and start testing.
Sorry, this is the best I can do.

2/24/069:29 AM

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