PYROMETER TEMPS How much is too high?
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Teching In
Joined: Jun 2007
Posts: 48
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From: Irving, Texas
PYROMETER TEMPS How much is too high? PYROMETER TEMPS How much is too high?
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Test drove new 408 turbo today, I had several gauges installed and one being a pyrometer.
Motor is still in tuning stages. I do not know what pyro temps are considered normal but while cruising under no load around 2400 – 2800 rpms, I was seeing approx. 1400 to 1475 degree temps. Sensor was mounted approx. 2 inches from head on No. 7 header.
Applying throttle into boost would decrease temps somewhat but when you return to a no load cruise, temps would immediately rise. Is this normal ? Outside temps today were around 50*
Any knowledgably info would be appreciated.
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Test drove new 408 turbo today, I had several gauges installed and one being a pyrometer.
Motor is still in tuning stages. I do not know what pyro temps are considered normal but while cruising under no load around 2400 – 2800 rpms, I was seeing approx. 1400 to 1475 degree temps. Sensor was mounted approx. 2 inches from head on No. 7 header.
Applying throttle into boost would decrease temps somewhat but when you return to a no load cruise, temps would immediately rise. Is this normal ? Outside temps today were around 50*
Any knowledgably info would be appreciated.
A pyrometer is of little use in a gasoline motor. There is a HUGE difference between running Xtemp at cruise and Xtemp at WOT. Think of the difference between a match and a large bonfire. Even at the same temp, one is going to heat up its surroundings a lot more than the other. Diesels need pyrometers because their AF ratio constantly varies, as they have no TB. Gas motors are much better served with a wideband AF gauge.
Egt's are always important.They are just as important on a gas motor as a diesel.They tell you more that air fuel ratio but also things like timing.Those egt's are high for part throttle.I would say the timing is too retarded at cruise.try adding some timing and see what happens.
Egt's are always important.They are just as important on a gas motor as a diesel.They tell you more that air fuel ratio but also things like timing.Those egt's are high for part throttle.I would say the timing is too retarded at cruise.try adding some timing and see what happens.
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