CHT temps, individual cylinder differences? |
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CHT temps, individual cylinder differences? |
falcor75 |
Apr 12 2018, 10:50 PM
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#1
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Senior Member Group: Members Posts: 1,579 Joined: 22-November 12 From: Sweden Member No.: 15,176 Region Association: Scandinavia |
For those of you that are running 4 CHT sensors under the plugs, what differences do you see between the cylinders?
Whats your typical temps for each cylinder with: A: Engine warmed up sitting at idle for a minute or two. B: Engine warmed up, cruising at 50-55 mph in fifth gear. |
MikeM |
Apr 14 2018, 09:10 AM
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#2
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Senior Member Group: Members Posts: 558 Joined: 16-May 10 From: Calgary, Canada Member No.: 11,733 Region Association: Canada |
This is a great reminder... but I've always wondered about the extra friction and heat caused by running at higher RPM. At what point are you defeating the purpose of running the engine fan faster?
Mike |
era vulgaris |
Apr 14 2018, 10:32 AM
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#3
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J is for Genius Group: Members Posts: 982 Joined: 10-November 13 From: Raleigh, NC Member No.: 16,629 Region Association: South East States |
This is a great reminder... but I've always wondered about the extra friction and heat caused by running at higher RPM. At what point are you defeating the purpose of running the engine fan faster? Mike With my 2270 the trade off point was around 4300-4500rpm, where extended running at rpm's higher than that would see a gradual increase in head temp. The most efficient cooling was between 3000 and 4000rpm. At lower speeds (sub 50mph), my car was ok to cruise as low as 2700rpm and not see head temp increase. But above 50mph, it definitely needed to be at or above 3k rpm for extended cruising. What that car taught me is that ideal driving/cruising for max cooling is done between 3k and 4k rpm, and ideal shift point is around 4500 rpm. This is of course, for your normal slogging along type driving. For the fun stuff, as long as you don't spend too much time above 4500 rpm, you're ok! |
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