anyone running no thermostat?
#2
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Please search dude. Running with no t-stat = very bad idea. Running with gutted t-stat for a street car = bad idea, atleast in the cooler months.
And nothing will happen if you start the car with the filler cap off, unless it's a hot start and the coolant is above 212F......
https://www.rx7club.com/showthread.p...ght=thermostat
https://www.rx7club.com/showthread.p...ght=thermostat
And nothing will happen if you start the car with the filler cap off, unless it's a hot start and the coolant is above 212F......
https://www.rx7club.com/showthread.p...ght=thermostat
https://www.rx7club.com/showthread.p...ght=thermostat
Last edited by rynberg; 01-18-06 at 01:50 AM.
#3
well, i actually have a mazda 80c thermostat, but the rubber in the middle of it that seals it up tight is gone, so its kinda like a "drilled" thermostat with 6 small holes in it. i guess its not totally gutted, just lets more coolant flow through before it opens...
#4
I ran my car with no t-stat for ages.
Its not a bad idea, the car just takes AGES to warm up. The car overfuels when its cold and oil flow is restricted. Apart from that, there is no effect/benefit of it.
Its not a bad idea, the car just takes AGES to warm up. The car overfuels when its cold and oil flow is restricted. Apart from that, there is no effect/benefit of it.
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Originally Posted by BobfisH
I ran my car with no t-stat for ages.
Its not a bad idea, the car just takes AGES to warm up.
Its not a bad idea, the car just takes AGES to warm up.
Originally Posted by BobfisH
The car overfuels when its cold and oil flow is restricted.
If your car is overheating while the thermostat is fully open then removing or replacing the thermostat will make absolutely no difference! Thermostats merely allow the engine to warm up quickly, they do not regulate peak coolant temps. The radiator does that.
Last edited by DamonB; 01-18-06 at 08:22 AM.
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The thermostat in our cars is called a bypass type because it seals the warm up bypass passage when it heats up. If you put one in a pan of boling water, that's the plunger that extends from the bottom. No thermostat means the bypass passge is open all the time, reducing cooling capacity. Racing Beat claims that it reduces cooling efficiency by 30%, which isn't noticeable in normal unstressed driving, but any stress(AC on a hot day, extended uphill runs, racing, etc) will more likely cause overheating.
Jacob, what you're describing is a zero pressure thermostat, that's what Evans reccomends for it's no boil waterless coolant. It's also a standard trick to keep engines with bad orings from over pressurizing the coolant. The problem in an FD is the pressure is really esssential to keep the coolant from boiling, since it runs so hot. You need to run pretty much straight antifreeze to prevent boiling if you run zero pressure, never a good idea. If that was the thermostat in the car, the previous owner knew it had bad orings when he sold it. Unless he had Evans coolant, there's no way anyone would put that in a fresh rebuild.
Paul
Jacob, what you're describing is a zero pressure thermostat, that's what Evans reccomends for it's no boil waterless coolant. It's also a standard trick to keep engines with bad orings from over pressurizing the coolant. The problem in an FD is the pressure is really esssential to keep the coolant from boiling, since it runs so hot. You need to run pretty much straight antifreeze to prevent boiling if you run zero pressure, never a good idea. If that was the thermostat in the car, the previous owner knew it had bad orings when he sold it. Unless he had Evans coolant, there's no way anyone would put that in a fresh rebuild.
Paul
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Originally Posted by paulpg
Jacob, what you're describing is a zero pressure thermostat, that's what Evans reccomends for it's no boil waterless coolant. It's also a standard trick to keep engines with bad orings from over pressurizing the coolant. The problem in an FD is the pressure is really esssential to keep the coolant from boiling, since it runs so hot. You need to run pretty much straight antifreeze to prevent boiling if you run zero pressure, never a good idea. If that was the thermostat in the car, the previous owner knew it had bad orings when he sold it. Unless he had Evans coolant, there's no way anyone would put that in a fresh rebuild.
That is incorrect. What Evans recommends is 0 or low pressure in regards to pressure cap. Thermostat has no effect on system pressure, only on flow. The only thing that could possibly be argued is that removal of the thermostat may reduce pressure in the water pump housing and increase the possibility of cavitation. If you want to run 0 pressure cooling system remove the rubber seal from the sprung part of your pressure cap, forget about the t-stat.
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