180 tstat ? April 21, 2008, 05:47:26 PM anyone switch from the 195 to a 180 thermostat like the old mustang efi mod on their 5.0? did it help performanceor did your mileage go to ? is it worth doing or does itsend the ecm into rich mode. did it on my 86 capri 5.0that i had before the cougar .ran a little cooler and stillwould get 22 on the road with a3.27 gear. only put 300miles on it though in the 2-1/2 years i had it. thanks for any input. sorry for the stupid ?'s but you guys drive yourstuff and have more real world experience. with the latemodel stuff . --irv toms Quote Selected
180 tstat ? Reply #1 – April 21, 2008, 06:34:58 PM I run a 180* thermostate because I only drive my T-bird in warm weather. I found it helps when I have the A/C on. With the 195* one the car ran a bit warmer than the 180* one but I've noticed no loss of gas mileage with the cooler thermostate. Quote Selected
180 tstat ? Reply #2 – April 21, 2008, 09:49:02 PM The engine runs more efficiently at 195*, but theoretically should make a bit more power at the cooler temp... Still, I doubt few folks could tell any real difference on the old ass-O-meter... As far as going "rich", ain't happening... By 100* with hot o2 sensors the EEC goes into closed loop.... Quote Selected
180 tstat ? Reply #3 – April 22, 2008, 12:11:13 AM No real difference for most people as stated. I notice it on really hot days though....Anything over 90* outside and the Cougar was a DOG with a 195* stat in my old setup....Switched to the 180* and things were MUCH better. I won't run a 5.0 without one. Quote Selected
180 tstat ? Reply #4 – April 22, 2008, 12:43:35 AM i run a 180 in my v8! its so much nicer i tried a 160 but it wastoo rich! Quote Selected
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