Quick Fuel Secondary air adjustment

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#15 (permalink)

04-10-2020, 07:22 AM

AC Ventura AC Ventura is offline

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Join Date: Feb 2016

Location: North of London, UK

Cobra Make, Engine: AC Cars Limited, 302 EFI

Posts: 204

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Hi Gary. I’m fairly sure I have the HR 780 QFT. Sorry don’t know size of the idle feeds. Sorry but can I get you to explain, how a 3.5 PV opens later than a 6.5, on an engine where the vacuum rises as the rpm increases? I thought the number relates to the vac that the PV opens and let’s fuel in.

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