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scicala · 02-19-2019, 03:15 PM

All I can say is you will be better off if you find someone to set up your carbs that has done it before. Your 20 kg/h at idle has nothing to do with manifold vacuum (hg). If kg/h is what the unisync measures, and is pegged on the high side, the only way to reduce it is to back off on the speed screws on the carbs, not the two mixture screws.
I'm pretty confident the power valves are not open at idle. It is possible the small diaphragms in them are ruptured and leaking though.

Sal

02-19-2019, 03:15 PM	#19
scicala Senior Member Join Date: Jun 2010 Location: Detroit suburb, MI Posts: 3,698	Re: Both 94s sinked at 20kg/h at idle All I can say is you will be better off if you find someone to set up your carbs that has done it before. Your 20 kg/h at idle has nothing to do with manifold vacuum (hg). If kg/h is what the unisync measures, and is pegged on the high side, the only way to reduce it is to back off on the speed screws on the carbs, not the two mixture screws. I'm pretty confident the power valves are not open at idle. It is possible the small diaphragms in them are ruptured and leaking though. Sal