Revs and cold engines

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08-08-2015, 04:47 AM

xb-60

CC Member

Join Date: Aug 2009

Location: Adelaide, SA

Cobra Make, Engine: AP 289FIA 'English' spec.

Posts: 13,152

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Revs and cold engines

We all know (well, most of us do) that revving a cold engine is the best way to wear it out quickly. An modern fuel injected engine will zing up to around 2000rpm at startup and then takes a little while to go down to what (I think) is an acceptable level. I hate that, but there's nothing I can do about it!
Question 1: Why do manufacturers program the efi to do this?
Question 2: What is a realistic maximum rpm to use on a cold engine
Question 3: How long should the revs be kept down (or what water temp / oil temp)?

Cheers,
Glen

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Last edited by xb-60; 08-08-2015 at 10:12 PM..

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