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8 & 10 cyl Bristol cars Type 407 onwards - restoration, repair, maintenance etc |
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Never measured it accurately, but my 603 will tick-over below 400. Doesn't sound nice so low so a rev-counter needle's width above 500 is normal. That's with the AFB carb - with the old Thermoquad, it wouldn't tick-over cleanly below about 800 - but that leaked fuel and air in equal quantities!
David |