EA82T HOP UP

SCOOBIDOO · Post by **SCOOBIDOO** » Wed May 31, 2006 8:15 pm

WANT TO CAP YOUR TEMP AT 180F/ 82C?
run a thermostat 10 degrees cooler...standard is 180F you can run a 170..i run a 160F/71C with my turbo and it always sit,s on 176F/80C and may go to 180F/82C if im into the turbo all the time.
on hot days these reading would be a few degree hotter which would
still keep your engine at optimum running temps....the benifits of running your ea82t with a cooler thermostat are great....
1/ big reduction of detonation(pinging) when you unknowingly fuel up with low grade fuel..(i hate that)
2/ you are now running you engine cooler so you get a more dense air fuel charge to your induction...more air (OXYGEN PARTICLE,S)means more go for your buck..
3/ YOUR CYLINDERS DONT OVER EXPAND AND LOSE VOLUMETRIC EFFIECIENCY.(DUE TO A BLOW OUT IN TEMP FROM BOOSTING AROUND ALOT)
all thermo sensor,s are fully funtional after 156F (70C) degrees on these engines so this does not effect ecu fuel mixture mapping....
there are no wrisk,s in lowering your thermostat 10C degree,s..but i would recomend 20C lower than stock for modified and turbo upgraded ea82t,s..as this will run at around 180F/82C when into the turbo alot..instead of temp blowout of 190F/88C-195F and more...cheers

tim_81coupe · Post by **tim_81coupe** » Wed May 31, 2006 10:58 pm

You'll have to run thinner oil to prevent muck building up and premature wear on components. I feel running a thermostat 20 degrees cooler is a bit silly, if I had to do that in my own car to prevent overheating I'd be saving for a new radiator.

MUDRAT · Post by **MUDRAT** » Wed May 31, 2006 11:39 pm

Just wondering if you've got any info to quantify this at all? What you've said kinda make sense, but . . . Most engines are designed to run at a certain temperature, ie with tollerances and clearances etc, and run more efficiently (ie create more power) when this temperature is maintained.

steptoe · Post by **steptoe** » Thu Jun 01, 2006 12:18 pm

Ford engineers advised me not to try go too cold for these concerns (when I was young and stupid enough to ask them ! )

I like the old bushy trick of turning the a/c condensor into an add on radiator to keep things cooler, running through heater hose curcuit with optional winter tap . Ice cubes in the base of the air box perhaps ?

SCOOBIDOO · Post by **SCOOBIDOO** » Thu Jun 01, 2006 2:31 pm

tim_81coupe wrote:You'll have to run thinner oil to prevent muck building up and premature wear on components. I feel running a thermostat 20 degrees cooler is a bit silly, if I had to do that in my own car to prevent overheating I'd be saving for a new radiator.

i dont see how that would happen when its running at the correct temp of low 80,s....
anyone running an ea82t should be running 10w/30w eco synthetic oil anyhow..thats if you want your turbo to live long..if your not..you would be the one with premature wear on your engine......and running temp in the lower 80,s celcius is correct temp for these engine,s...anyway...it,s a way to keep your temp from going too high on hot days when your on the turbo a lot...beside,s i like good thread which shows up any experience,or lack of it..cheers

dree · Post by **dree** » Thu Jun 01, 2006 3:01 pm

If the Subaru engineers (great cars, smart Blokes I'd reckon) could've achieved absolute thermal stability at the correct operating temperature they would've. Instead they have achieved an optimum operating temperature range, never too hot, and never too cold. By dropping in a thermostat that is 20degC lower than specified, your dropping the average operating temperature, and I'd say dropping it at times into temperatures that the engine wasn't designed to run at.

This is assuming that the engine cooling system is otherwise operating as it should be, maybe you have another problem causing the engine to run too hot, and your cooler thermostat is compensating for that?

dree · Post by **dree** » Thu Jun 01, 2006 3:04 pm

By the way, an 82oC thermostat starts to open at 83.5 - 86.5, it's fully open at 98, according to the manual, nowhere does it say that 82 is the desired temperature??

Subaman · Post by **Subaman** » Thu Jun 01, 2006 3:38 pm

I have always put a cooler thermosat in my turbo`s or modified the standard one, see I live in QLD where temps can and do go over 40 deg in summer,and sometimes I tow around a ton of campervan, I have alot more boost than mr Fuji intended and also alot bigger tyres, I also dont think Mr Fuji set my car up to be flogging away through foot deep sand with this configuration either. I would rather run the risk of running a few degrees cooler than recomended rather than overheating it thats for sure.

Cheers
Grant

SCOOBIDOO · Post by **SCOOBIDOO** » Thu Jun 01, 2006 5:19 pm

dree wrote:By the way, an 82oC thermostat starts to open at 83.5 - 86.5, it's fully open at 98, according to the manual, nowhere does it say that 82 is the desired temperature??

ok MR FROSTY.....explain how my temp always sits on 82c with a 180f thermostat or a 160f thermostat? i have no temp problems,new rad fresh engine all good, my set up is just fine..
this will build temp stability/ reliability into your system when it does get hot....
dah....

i live in a hot climate also..where temps reach 40 plus....

dree · Post by **dree** » Thu Jun 01, 2006 5:41 pm

dree wrote:This is assuming that the engine cooling system is otherwise operating as it should be, maybe you have another problem causing the engine to run too hot, and your cooler thermostat is compensating for that?

I think I already gave you a possible reason for that.

The bottom line is, that if you are working your engine so hard that your cooling system can't keep up, a cooler thermostat isn't going to help. A bigger radiator, or thermo fan would help, but the thermostat isn't a cooling device, it's a regulator.

I believe it gets pretty hot in Japan too, gets hot here in Melbourne we had quite a few days around 40 last summer. And I'm sure Mr Fuji knows how hot it gets in Queensland.

And there isn't any need for name calling MR STEAMY this is just a discussion, and it's not one that's gonna solve world poverty or hunger.

SCOOBIDOO · Post by **SCOOBIDOO** » Thu Jun 01, 2006 6:12 pm

losen your g-string a little.....and have a nice day...cheers

dree · Post by **dree** » Thu Jun 01, 2006 6:22 pm

Will do Scoobidoo, same to you.

Don't forget to be careful what you wish for.

...beside,s i like good thread which shows up any experience,or lack of it..cheers

SCOOBIDOO · Post by **SCOOBIDOO** » Thu Jun 01, 2006 6:52 pm

that sounds like something a woman would say..just to get the last word in after a hissy fight they lost......i guess you would keep to the regulation twincats and muffler and silencer as well which is recomended on these engines......how is is that you can find an answer to questions that have not been asked...only a woman can do that.....i guess you dont need to modify your cooling system to Suit the rest of the modified car if you only use it to go shopping on your days off....F.L.

dree · Post by **dree** » Thu Jun 01, 2006 7:13 pm

I've been quite calm, if you put information on a forum such as this, you need to be able to substantiate that information.

If I think it's bad advice, I'll pipe up and say so just as others have.

Modifications are fine, as long as they are well thought out.

Over the past year I've been shopping for G-strings in my Subaru, taken it to the Flinders Ranges, and back via Cameron Corner, to the top of Mt Stirling and various other High country locations on multiple occasions.

I thought this was a place for discussing all things Subaru, not a place for cheap shots and personal insults. Maybe I was wrong?

You are quite welcome to the last word.

Subaman · Post by **Subaman** » Thu Jun 01, 2006 7:44 pm

And I'm sure Mr Fuji knows how hot it gets in Queensland

I am sure he does too, but comon sense would tell you they dont build cars differently to suit each state of Australia,they compromise, I just made mine more suitable for QLD weather . Mr fuji didnt intend me to have 16psi boost with 28inch tyres either, if you are going to do things to generate more heat then you need to take steps to improve your cooling capabilities. I gues thats why they invented things like automatic transmission coolers and secondary fans on airconditioned cars etc.

Why shoot the guy down for offering a bit of advice and contributing to the message board.

dree · Post by **dree** » Thu Jun 01, 2006 8:31 pm

I didn't want to shoot anyone down, or get anyone upset.

I was just stating that a thermostat doesn't increase the capacity of a cooling system, it regulates the temperature.

If you want better cooling (a worthy modification) then you need to increase the capacity of the cooling system somehow (bigger radiator, extra thermo-fan etc).

I'm not the only one who thinks it's the wrong way to achieve better cooling performance.

Heres to peace love and healthy debate.

fredsub · Post by **fredsub** » Sat Jun 03, 2006 7:11 pm

SCOOBIDOO wrote:WANT TO CAP YOUR TEMP AT 180F/ 82C?
run a thermostat 10 degrees cooler...standard is 180F you can run a 170..i run a 160F/71C with my turbo and it always sit,s on 176F/80C and may go to 180F/82C if im into the turbo all the time.
on hot days these reading would be a few degree hotter which would
still keep your engine at optimum running temps....the benifits of running your ea82t with a cooler thermostat are great....
1/ big reduction of detonation(pinging) when you unknowingly fuel up with low grade fuel..(i hate that)
2/ you are now running you engine cooler so you get a more dense air fuel charge to your induction...more air (OXYGEN PARTICLE,S)means more go for your buck..
3/ YOUR CYLINDERS DONT OVER EXPAND AND LOSE VOLUMETRIC EFFIECIENCY.(DUE TO A BLOW OUT IN TEMP FROM BOOSTING AROUND ALOT)
all thermo sensor,s are fully funtional after 156F (70C) degrees on these engines so this does not effect ecu fuel mixture mapping....
there are no wrisk,s in lowering your thermostat 10C degree,s..but i would recomend 20C lower than stock for modified and turbo upgraded ea82t,s..as this will run at around 180F/82C when into the turbo alot..instead of temp blowout of 190F/88C-195F and more...cheers

an extra minute spent to write this to improve the grammar of this would hurt ?
A shame because it seems to be trying to say something usefull?

anyway, I gather its about running your ea82t at lower temps, say 80C or less. Well I can tell you after replacing water pump, and radiator with a dual core, it does that, especially now in winter, and I'm not fond of it, esp ecially when most journeys are short.
I have resorted to blocking half the radiator.

The cons of running too low temp:
1. uses too much fuel. (aka water (engine) temp fuel map)
2. lubrication is not at correct operating temperature
3. no bloody cabin heat - its winter

4. if the aim is to have cooler air induction, then its a intercooler/water injection you need, not running engine that much cooler.

mention of synthetic oils?
using fully synthetic oil sucks on these engines IMHO...it just leaks outa the seals everywhere!

SCOOBIDOO · Post by **SCOOBIDOO** » Sat Jun 03, 2006 11:33 pm

yes running to low would do that...though 82c is not low...
in the ea82 fsm on the last page of part 1..it has running temp readings ranging from 75c-85c..which appears from the specs to be considered normal..at 85c the thermostat starts to open..with standard thermostat fitted...meaning the temp has reached a point where cooling starts to occur to maintain this temp..at 93c-97c the thermosensor switch turns on the thermofan...
this means it has entered a range that requires cooling... at 100c the thermostat is fully open..although this does not mean that your car should run at 100c all the time...with the thermo on....with all this said....the average temp is 85c-86.5c....a few degree,s up or down is not to hot or to cold....

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