how hot? What thermostat are you running on the street?

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how hot? What thermostat are you running on the street?

Post  83Capri on Sun 28 May 2017 - 14:55

Just wondering what the consensus was on thermostat temp for a street driven machine.
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Re: how hot? What thermostat are you running on the street?

Post  maverick on Sun 28 May 2017 - 15:37

Assuming you can, running cooler than 180° or so isn't doing your engine any favors. Heat actually helps to cook off condensation in your oil, helping to keep the engine clean. There's a good reason that N.O.T. in newer cars is closer to 200°....a number that used to make us uncomfortable. A cooling system that's up to the task allows you to run hotter SAFELY...but we don't always have one of those.
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Re: how hot? What thermostat are you running on the street?

Post  BOSS 429 on Sun 28 May 2017 - 17:21

we dont run a stat in any of our street cars, some have ehx system's that are 15 years old now, NOT rusted thru.

A stats job is to keep and engine hot,not cool it

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Re: how hot? What thermostat are you running on the street?

Post  83Capri on Sun 28 May 2017 - 20:46

The reason I ask is I finally have my capri to a point where I'm going to get it plated. I put it together with a 195 t-stat. My electric fan has an adjustable thermostat but my rad is only a 1" single core. and I have 1-2mm between the fan and the water pump pulley. Currently no hood, tuned the carb today had it running for an hour or so roaster the tires a few times and temp was holding steady. Trans has an external cooler and returns through radiator. fan wasn't even hooked up for most of the time I had it running today. sunny day 74degreesF.
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Re: how hot? What thermostat are you running on the street?

Post  The Mad Porter on Mon 29 May 2017 - 13:38

High temperature thermostats are for reducing emissions, minimizing engine wear, good fuel economy... and are tolerable with fast burn modern combustion chambers and powerful ecms.

In a high compression, high performance street engine running on crap gas a high temp (195) thermostat invites problems (lowers detonation threshold for a given fuel, loss of power due to charge heating are 2 examples)

In our performance engines I recommend a max of 180 and a good cooling system if static c/r vs cam specs isn't pushing the envelope. A lower temp thermostat makes more power both on the dyno and in the vehicle though any less than about 170 invites a tic more cylinder wall wear. I'll personally take the extra 10 to 20 hp myself.

To the OP. If your combo is edgy run a lower temp stat. If not run a 180 and block the heat through the intake if the passage is present.



S
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Re: how hot? What thermostat are you running on the street?

Post  83Capri on Mon 29 May 2017 - 22:34

I hadn't even thought about the heat crossover. combo isn't crazy cr is around 9:1 stock cam 106 degree ICL. d0ve heads offenhauser dual port intake. next time I have a good reason to pull the intake off I'll make sure I do that, thanks
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