Colder, big bore thermostat - runs cooler

steptoe · Post by **steptoe** » Mon Dec 28, 2009 12:18 pm

TT2041 - 170 is the tridon brand part number of the colder than std 180 deg F thermostat I fitted up today in about ten minutes, into my EA82T L Sedan.

It is the same as what DiscoAdrian has used in his EA82T. Ten deg F cooler opening and bigger bore - although they may not open as far as the std 180 std bore thermostats. They are about twice the price of a standard but worth it in my opinion in the warmer climates of our continent.

Using my engine watchdog digital temp readout of the engine METAL, not water, I am seeing the expected difference of about 6 deg C. The dash gauge also shows a slight reduction in the operating temp.

For a warmer heater in winter I am sure I will be using a standard thermostat again come Anzac Day

Next tinker will be add a thermostat device to keep my LPG converter at about 130 - 140 F (54 -60 C) the optimum temp for vapour conversion to avoid heavy ends in the liquid gas falling out of suspension. After that the water wetter stuff....

T'subaru · Post by **T'subaru** » Mon Dec 28, 2009 12:37 pm

What are you using for your lpg convertor, impco? With mpfi how do you have it plumbed? Not considering a conversion but sold heavy, light industrial parts and equipment for several years and I'm curious.

steptoe · Post by **steptoe** » Mon Dec 28, 2009 4:35 pm

Yeah, IMPCO L converter feeding an IMPCO 200 mixer in a dedicated config, bypassing the early flapper style afm entirely. I have air filter box sitting in spare wheel well feeding to mixer then through turbo - love it!

discopotato03 · Post by **discopotato03** » Mon Dec 28, 2009 5:31 pm

Yes I like those thermostats in EA82T's , I think the advantage is that they can open up a large area fairly qickly which seems to suit the rapid changes in coolant temperature in these flat fours . Provided you have the ability to drag enough air throught the radiator you can keep the temp rise in check by pulling a lot of heat out reasonably quickly . I do it with the std viscous hub fan and a Davies Craig bulb type elec fan switch to operate the condenser fan . Bulb is in the radiator end of the top hose because it always had chronic leaks when at the thermostat housing end of this hose .

My car warms up reasonably quickly from cold and I don't think 76c is too low in winter . I run synthetic oil so it doesn't need much if any innitial heat to be quite fluid at cold temps , mineral oils are different particularly the 20Wxx ones . Factory reckons 15Wxx for Australian conditions but thats another story .

Cheers A .

T'subaru · Post by **T'subaru** » Tue Dec 29, 2009 11:38 am

steptoe wrote:Yeah, IMPCO L converter feeding an IMPCO 200 mixer in a dedicated config, bypassing the early flapper style afm entirely. I have air filter box sitting in spare wheel well feeding to mixer then through turbo - love it!

Sounds trick, sorry to sidetrack post. would you post up a pic sometime?

spike · Post by **spike** » Tue Dec 29, 2009 3:26 pm

ive got the part number written down and will be ordering 2 in tommorow.
driving home today temp guage was fine got up the drivway came high but not red then suddenly steam in the cockpit, as i threw mum out the door thinking it was smoke.
well apparently the heater cores gone but still im sick of it over heating.

steptoe · Post by **steptoe** » Tue Dec 29, 2009 9:12 pm

and the gasket is TTG15 for all my MY and L SERies manifolds. The Tridon book reckons the L uses TTG09. Disco also found this so, think the book is a misprint.

Mr Top Hat · Post by **Mr Top Hat** » Tue Dec 29, 2009 11:33 pm

steptoe wrote:TT2041 - 170 is the tridon brand part number of the colder than std 180 deg F thermostat I fitted up today in about ten minutes, into my EA82T L Sedan.

It is the same as what DiscoAdrian has used in his EA82T. Ten deg F cooler opening and bigger bore - although they may not open as far as the std 180 std bore thermostats. They are about twice the price of a standard but worth it in my opinion in the warmer climates of our continent.

Using my engine watchdog digital temp readout of the engine METAL, not water, I am seeing the expected difference of about 6 deg C. The dash gauge also shows a slight reduction in the operating temp.

For a warmer heater in winter I am sure I will be using a standard thermostat again come Anzac Day

Next tinker will be add a thermostat device to keep my LPG converter at about 130 - 140 F (54 -60 C) the optimum temp for vapour conversion to avoid heavy ends in the liquid gas falling out of suspension. After that the water wetter stuff....

can this thermostat be used in a EA82 carbie ?

steptoe · Post by **steptoe** » Wed Dec 30, 2009 11:41 am

it is a listing for ea81 and ea 82 not just the ea82T, so I'd say yes it will fit your EA82 carby manifold thermostat housing. It is both a colder opening thermostat by the 170 F instead of 180F (about 6 deg C difference) and a bigger opening. You can just get a colder std opening thermostat to try but why not go the whole hog.... like we have.....

nncoolg · Post by **nncoolg** » Tue Jan 05, 2010 8:44 pm

Guys just remember, these aftermarket 'TTS' or 'Sports' thermostats are only the same size as the genuine subaru ones anyway, so if you are going to use generic thermostats you should always use these 'sports' (OEM subaru size) ones, the normal generic ones are way smaller that OEM. The benefit of the tridon catalouge is of course the above mentioned colder ones. You can also get a cooler fan switch to match.

steptoe · Post by **steptoe** » Wed Jan 06, 2010 8:14 am

Two good points to raise and remember