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)

 

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.

 

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.

 

Cool, Thanks for the help just wanted to make sure

 

Yeah i use my AC switch and my turbo timer to keep the fans on for 5 or 6 minutes after i cut my car off.

 

Nice wheels

 

thanks