Thermostats

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Thermostats

Post by swinger1969 on Thu Oct 01, 2015 7:51 pm

Jus thought I'd stick this in as "s'os Y'know" thing! I had a 195 thermostat in my 69 340 which seemed okay but it always ran about 210 which I didn't like. So I thought I'd try a 180 cuz I always run those in my Chev engined streetrods. I decided to get one of the Mr Gasket "Hi Flow" ones cuz they're highly rated so I heard. Anyway, I put it in and took the car out for coffee twice and it "seemed" fine, but then I took it out a couple of weeks ago for a short jaunt and the temp kept going up and up so I headed home......just in time to pull into the shop and everything puked out! In the end it turned out the NEW thermostat was faulty and didn't open , at least on the last jaunt. Took it back and decided to go with a good "Super Stant" because IF they go bad they go bad "open". Anyway, learned that it's a good idea to at least check them in a pot of hot water before they go in ! Rolling Eyes Just sayin !

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Re: Thermostats

Post by philcollins on Thu Oct 01, 2015 8:09 pm

I had a 185 in mine, Guy in rad shop (50 years experience) told me to put a 195

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Re: Thermostats

Post by swinger1969 on Fri Oct 02, 2015 6:03 pm

philcollins wrote:I had a 185 in mine, Guy in rad shop (50 years experience) told me to put a 195

Funny you mentioned that - I've always run 180's in everything, but then all my "old rods " have small block Chevs in them, but I was told by a mechanic buddy today that most should be running 195's for peak performance etc ! What do most guys run in Mopars?? Shocked

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Re: Thermostats

Post by Gazoo on Sat Oct 03, 2015 5:26 am

I have 180 thermostat in mine. A higher temp thermostat is better for performance (as mentioned above), but for just cruizing around in traffic, I'd rather it run cooler.

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Re: Thermostats

Post by swinger1969 on Sat Oct 03, 2015 11:38 am

Gazoo wrote:I have 180 thermostat in mine. A higher temp thermostat is better for performance (as mentioned above), but for just cruizing around in traffic, I'd rather it run cooler.

Yeah that's kinda the way I look at it too. It's got all the performance I need for the street and I'd rather it ran cool, especially on road trips.

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Re: Thermostats

Post by Grumpy427 on Sun Nov 01, 2015 8:02 pm

I have a 195 in my vette with massive 3 core rad, good shroud and 7 blade fan. Motor is stock, 350 hp 390 tq. Has 20 degrees initial timing and 35 total. I can watch the thermostat open and close on the gauge. lol so thats where it needs to be, even on hot days.

The duster on the other hand, i have a good aluminum water pump etc same 7 blade fan as the vette, big tank 22" smiths rad with shroud and rad cap and a 185 Robert shaw thermostat. He assured me that it will keep my big block cool and then some. In my opinon, and from what the engine builder tells me, an engine needs to reach operating temp in order for the rings to seal and the pistons to expand into the bores correctly. 195-200 is not over heating, thats normal temp for most engines. I cant wait to get the duster all together to see whats going to happen. over the years i have learned that the rad cap and fans are the biggest culprit in over heating.

A stat is designed to open and close to let the water cool in the rad and absorb the heat in the motor. A 160 stat that opens and stay open in a restrictor at best. Put in the correct stat for the correct application.

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Re: Thermostats

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