Thermostat questions
04-27-2008, 05:33 PM
#12
6th Gear Member
Join Date: Apr 2007
Location: California
Posts: 10,468
RE: Thermostat questions
You want to run as hot as you can without overheating, detonating or having to compromise the tune. The hotter the engine is the more readily the fuel will vaporize and combust. This is true for both EFI or carb, and though carb'd cars can run at a lower temp and not have to worry about the open/closed loop problems, the intake still needs to have enough heat to atomise/vaporize the fuel in the manifold. That's why the old cast iron intakes had exhaust crossovers, they were too slow to heat up and after initial startup(especially in cold weather) would run like *** until the intake heated up if it didn't have a crossover. That's also the entire point of having a compression stroke in an engine, pressure= heat. Without enough heat combustion is poor or non existant.
04-27-2008, 06:30 PM
#14
The Rogue Mod
Join Date: Feb 2006
Location: Maryland Sucka's!!
Posts: 21,918
RE: Thermostat questions
180 is the way to go. Your gauge is either inacurate, or your stat is partially stuck not allowing the car to fully warm up. If there is coolant circulating before it can heat up, it will take longer for the engine to reach operating temp. However, you would notice this more in the cooler ambient temps. Also, make sure the radiator is not clogged inside or blocked be debris in front of it and that the fan clutch is working correctly.
04-27-2008, 10:14 PM
#15
1st Gear Member
Thread Starter
Join Date: Jan 2003
Location: United States
Posts: 111
RE: Thermostat questions
well the consensus seems to be 180. Just so I know, why is 180 better than the stock 192?
By the way mymustang isstock except for full exhaust and cold air intake.
Thanks for the info.
By the way mymustang isstock except for full exhaust and cold air intake.
Thanks for the info.
04-28-2008, 05:37 AM
#16
5th Gear Member
Join Date: Jan 2006
Location: Puerto Rico
Posts: 3,926
RE: Thermostat questions
Cooler intake charge (EFI or Carb) and engine = better performance. A 180° t-stat is a midpoint for the engine to work a little colder and increase performance. EFI systems exist due to emissions control, so all its programming from the OEM is concentrated on complying with emissions. Allowing the engine to work cooler allows more spark advance and richer A/F settings to be used by the system. By the same token, engine components need to reach the sweet temp spot for proper expansion and prevent excessive wear due to clearances variations as depicted below as an example......
However, heat in the intake tract is not good for performance.... you want a denser mix (=colder), so you can pack more of it in the same compressed space in the cylinders. Reason why an old-school trick for carb setups is to use a fuel cool can to lower fuel temp.
However, heat in the intake tract is not good for performance.... you want a denser mix (=colder), so you can pack more of it in the same compressed space in the cylinders. Reason why an old-school trick for carb setups is to use a fuel cool can to lower fuel temp.
04-28-2008, 12:14 PM
#17
2nd Gear Member
Join Date: Aug 2006
Location:
Posts: 294
RE: Thermostat questions
I am in the process of finishing up my h/c/i and my buddy told me to put a 160* t-stat in my car. i have a efi aod with gt40 heads, e cam, typhoon intake, pulleys, CAI, flex-a-fan (not electric), full exhaust etc.
so is the 160* gunna make my car run bad now or what? is it better than stock? should i replace it with a 180* or is it not that important
so is the 160* gunna make my car run bad now or what? is it better than stock? should i replace it with a 180* or is it not that important
04-28-2008, 04:30 PM
#18
1st Gear Member
Thread Starter
Join Date: Jan 2003
Location: United States
Posts: 111
RE: Thermostat questions
ORIGINAL: Joel5.0
Cooler intake charge (EFI or Carb) and engine = better performance. A 180° t-stat is a midpoint for the engine to work a little colder and increase performance. EFI systems exist due to emissions control, so all its programming from the OEM is concentrated on complying with emissions. Allowing the engine to work cooler allows more spark advance and richer A/F settings to be used by the system. By the same token, engine components need to reach the sweet temp spot for proper expansion and prevent excessive wear due to clearances variations as depicted below as an example......
However, heat in the intake tract is not good for performance.... you want a denser mix (=colder), so you can pack more of it in the same compressed space in the cylinders. Reason why an old-school trick for carb setups is to use a fuel cool can to lower fuel temp.
Cooler intake charge (EFI or Carb) and engine = better performance. A 180° t-stat is a midpoint for the engine to work a little colder and increase performance. EFI systems exist due to emissions control, so all its programming from the OEM is concentrated on complying with emissions. Allowing the engine to work cooler allows more spark advance and richer A/F settings to be used by the system. By the same token, engine components need to reach the sweet temp spot for proper expansion and prevent excessive wear due to clearances variations as depicted below as an example......
However, heat in the intake tract is not good for performance.... you want a denser mix (=colder), so you can pack more of it in the same compressed space in the cylinders. Reason why an old-school trick for carb setups is to use a fuel cool can to lower fuel temp.
THANKS! very informative!
04-28-2008, 06:34 PM
#19
5th Gear Member
Join Date: Jan 2006
Location: Puerto Rico
Posts: 3,926
RE: Thermostat questions
ORIGINAL: ford91mustang
I am in the process of finishing up my h/c/i and my buddy told me to put a 160* t-stat in my car. i have a efi aod with gt40 heads, e cam, typhoon intake, pulleys, CAI, flex-a-fan (not electric), full exhaust etc.
so is the 160* gunna make my car run bad now or what? is it better than stock? should i replace it with a 180* or is it not that important
I am in the process of finishing up my h/c/i and my buddy told me to put a 160* t-stat in my car. i have a efi aod with gt40 heads, e cam, typhoon intake, pulleys, CAI, flex-a-fan (not electric), full exhaust etc.
so is the 160* gunna make my car run bad now or what? is it better than stock? should i replace it with a 180* or is it not that important
