Performance loss with 180 degree thermostat?? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 06-21-2004, 06:15 PM   #11
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the downside to a drilled tstat is that it will take you longer to warm up the car.
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Old 06-21-2004, 10:54 PM   #12
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Default I know what your all saying..

Quote:
Originally Posted by macho_mike21
to bleed the system you just unscrew the brass screw on top of the t-stat housing a little when the system is running and the car is warmed up.
Hi,
Yes i bled the system. I dont know why or how but, Yes i did install a 180 degree T-Stat from auto zone including a gasket the o-ring is worthless.. Not needed.. The car before ran in town or at highway speed'* at 200 degree'*. Now with the new 180 T-Stat it run'* between 180- 195 i would say, Cant really tell with stock bogus guages. I checked fuel milage and yes i lost 2 mpg (((( Big Deal )))) There isnt really a major loss of power but, it just feel'* slightly sluggish. The car run'* great otherwise.

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Old 06-23-2004, 02:05 PM   #13
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Default Im gonna give this some time.

Quote:
Originally Posted by jr's3800
Hmmm thats odd.... I have run 180 T-Stats for years... And have never had an issue... I get 20 mpg in town with my foot in it... And I have done 32mpg on the 95, and 31 on the 91 speeding well over the speed limit for 100 miles or so... I did 31 mpg... 160F would cause issues for the engine management system.... But a 15 degree drop should not effect it.. If you feel that your car is loosin effiency and you want it back then reinstall the 195...
I'am going to run this for a while and see what highway milage is like. I already know i lost 2 mpg with the 180 T-Stat, but id rather have it run cooler. I never added any fan'*, no extra lower spoiler'* or anything to get my car to add more air...Hey wait a minute I did Hose the hell out of the A/C condensor to get rid of all the bugs. This could have helped air flow..

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Old 06-23-2004, 03:32 PM   #14
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Did you change the t-stat around the same time you put the SSEi badge on?? Because it could subconsciously make you think it should run like an SSEi but only getting SE performance...



I'm sorry, had to do it....


If I were you, since all the info at performance shops and threads and other automotive forums completely support the idea of running a cooler t-stat, I'd concentrate your efforts into finding what else came unplugged, or anything else you may have done to effect performance, i.e. partial intake blockage due to a bumped tube, etc.

Good luck.
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Old 06-23-2004, 07:08 PM   #15
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have you checked your PCV valve and O2 sensor lately?
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Old 06-23-2004, 08:01 PM   #16
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Default Everything has been replaced

Quote:
Originally Posted by macho_mike21
have you checked your PCV valve and O2 sensor lately?
Yes i replaced everything tune up wise, Including the O2 sensor, pcv valve, wires, plugs, T-Stat, Oil & Filter, Air cleaner element, Serp belt....... The car runs fine there is lots of power. It just feels different and it does run cooler. I know alot of you probably think im nuts but, It is what it is. I've been working on and with cars now for 22 year'* and know how to change part'* and diagnose to a certain extent. I ran the car on a snap on scanner and everything check'* out fine....

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Old 06-23-2004, 08:05 PM   #17
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LOL, It'* ok i probably would have done the same thing. Maybe i'll de Badge it over the weekend. Then i bet it will return to normal, I bet all this is in my head...LOL

Quote:
Originally Posted by TrueWildMan
Did you change the t-stat around the same time you put the SSEi badge on?? Because it could subconsciously make you think it should run like an SSEi but only getting SE performance...



I'm sorry, had to do it....


If I were you, since all the info at performance shops and threads and other automotive forums completely support the idea of running a cooler t-stat, I'd concentrate your efforts into finding what else came unplugged, or anything else you may have done to effect performance, i.e. partial intake blockage due to a bumped tube, etc.

Good luck.
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Old 06-23-2004, 10:44 PM   #18
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Dood, the extra weight of the three SSEi badges is causing the loss in MPG. Seriously, the O2 is only good for 50-60k miles. And there'* so many other contributors. I haven't seen ANYONE lose efficiency from this.
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Old 06-24-2004, 10:52 AM   #19
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I know where this is going......
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Old 06-24-2004, 10:56 AM   #20
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repeat after me, bosch bad....
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