Cooling Engine Down at Idle provokes anomaly
#1
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Location: Overland Park, KS
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Cooling Engine Down at Idle provokes anomaly
Hello,
I'm new to the forums and to Rx-7's
Anyways I have a 93 RX-7 with 45,000 miles and I usually let it idle until the exhaust gas temp drops below 500C I have noticed that the EGT drop a lot faster if I have the A/C on full blast. Is this a miss sensing of the gauge or do the turbo's cool down alot faster with the A/C blowing.
Street Port
Powertrain Management Computer, with Data Acquistion Software
Greddy Profec B. Boost Controller
PFS Air-to-Air Intercooler
PFS High Flow Turbos(almost same size as stock but much better flow)
Upgraded Vacum Hoses
Cold Air Intake
PFS 3" Exhaust with downpipe
PFS Adjustable Shocks
PFS Sway Bar
PFS Race Springs
Fiske FM5 Wheels 245mm tires in front/ and 275mm tires out back
PFS Competition Brake Package
PFS Short Shift Kit
PFS HD Clutch Kit w/ lightweight flywheel
HKS Boost Guage(mounted on steering column)
HKS Exhaust Gas Temperature Guage(pillar mounted)
I'm new to the forums and to Rx-7's
Anyways I have a 93 RX-7 with 45,000 miles and I usually let it idle until the exhaust gas temp drops below 500C I have noticed that the EGT drop a lot faster if I have the A/C on full blast. Is this a miss sensing of the gauge or do the turbo's cool down alot faster with the A/C blowing.
Street Port
Powertrain Management Computer, with Data Acquistion Software
Greddy Profec B. Boost Controller
PFS Air-to-Air Intercooler
PFS High Flow Turbos(almost same size as stock but much better flow)
Upgraded Vacum Hoses
Cold Air Intake
PFS 3" Exhaust with downpipe
PFS Adjustable Shocks
PFS Sway Bar
PFS Race Springs
Fiske FM5 Wheels 245mm tires in front/ and 275mm tires out back
PFS Competition Brake Package
PFS Short Shift Kit
PFS HD Clutch Kit w/ lightweight flywheel
HKS Boost Guage(mounted on steering column)
HKS Exhaust Gas Temperature Guage(pillar mounted)
#2
Rotary Enthusiast
great looking car.
could be air from fans blowing over exh manifold and down pipe, cool the metal, and influence egt's. this could offset the slight load due to ac compressor.
could be air from fans blowing over exh manifold and down pipe, cool the metal, and influence egt's. this could offset the slight load due to ac compressor.
#3
Eats, Sleeps, Dreams Rotary
iTrader: (14)
Originally Posted by binary89
I usually let it idle until the exhaust gas temp drops below 500C
The fans are on all the time with the AC is switched on, which may explain your EGT results.
#5
No more G6
iTrader: (19)
Originally Posted by moconnor
Why? Your oil and water temperatures are most likely rising as you sit with no airflow through the oil cooler(s) and radiator. The radiator fans will eventually come on when the water temperature gets high enough (94-100C depending on load) but it would be best that the water temperature did not get that high.
The fans are on all the time with the AC is switched on, which may explain your EGT results.
The fans are on all the time with the AC is switched on, which may explain your EGT results.
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