Low temp thermostat. Tech answer pls
Originally Posted by trinydex
bull****
why don't you let me in on how refined my pigrich stock fuel curve is? why don't you let me in on how i get less than 20 miles to the gallon on the freeway even tho i have a 2 liter efficiently boosted engine... where's the refinement in that? you think pulling timing to save your *** from blowing up is refinement? any good standalone worth it's salt already has that. you think being stupid and adding all kinds of stupid fuel when the engine is too hot or too cold is refinement? that's called manufacturers lookin' out for their own ***... not refinement, please recognize the difference
refinement is having a silky smooth idle with the worst cams in the world. can you do that with your stock flashed ecu? refinement is safety without doing something stupid and lazy, not to mention heat inducing.
why don't you let me in on how refined my pigrich stock fuel curve is? why don't you let me in on how i get less than 20 miles to the gallon on the freeway even tho i have a 2 liter efficiently boosted engine... where's the refinement in that? you think pulling timing to save your *** from blowing up is refinement? any good standalone worth it's salt already has that. you think being stupid and adding all kinds of stupid fuel when the engine is too hot or too cold is refinement? that's called manufacturers lookin' out for their own ***... not refinement, please recognize the difference
refinement is having a silky smooth idle with the worst cams in the world. can you do that with your stock flashed ecu? refinement is safety without doing something stupid and lazy, not to mention heat inducing.
Gunzo said the code had been refined - meaning it has gone through enough revision to reach a highly evolved state. He is right. Stock ECU systems are much more evolved vs standalone in the area of complex algorithm for compensation.
Nothing is mentioned of refinement. Why don't you calm down, read things through slowly and comprehend it before opening your mouth?
Originally Posted by gunzo
with codes thats been refined.. no standalone can beat that..
and if he is referring to the safety... where and what is unsafe about the standalones?
can yah answer that for me? cuz that's the question i was posing.
Thread Starter
Evolved Member
Joined: Mar 2004
Posts: 1,041
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Installed the Ralliart 71ºC yesterday.
When going on roads I see the engine temp needle 5mm lower than the stock.
When going on the streets at low speeds the engine temp needle stays in the middle as before.
If you are driving on the road and stop your car the rpm needle will be higher than the 900rpm due to "cold start mode".
I will re-install the Ralliart ECU in this weekend and will see if everything goes ok.
When going on roads I see the engine temp needle 5mm lower than the stock.
When going on the streets at low speeds the engine temp needle stays in the middle as before.
If you are driving on the road and stop your car the rpm needle will be higher than the 900rpm due to "cold start mode".
I will re-install the Ralliart ECU in this weekend and will see if everything goes ok.
Thread Starter
Evolved Member
Joined: Mar 2004
Posts: 1,041
Likes: 1
Re-installed the Ralliart ECU and it really asks for a lower temp thermostat. Test drove my car right now and the temp needle stayed at 71ºC all the time. The ECU adjusts the engine fan to start earlier at 71ºC.
So in my case the LT. thermostat is necessary.
I will update the thread as soon as I have more info.
So in my case the LT. thermostat is necessary.
I will update the thread as soon as I have more info.
Originally Posted by Crufty Dusty
Some observations:
1) Car is a JDM Evo 8 MR
2) Stock ECU
3) ARC water thermostat
Local conditions are 30-35 degC in the day, between 23-28 degC in the night.
Typical coolant temps are 80-90 degC, depending on traffic. Highway cruising is typically around 80 degC. After installation of the water temp thermostat, it went down to 50 degC. Result? Uneven idling due to excess fueling, poor fuel economy, surging on WOT etc, everything that's indicative of a fueling problem. I'm surprised a CEL was not thrown since the water temp should be fluctuating wildly between cold and fully warm.
I'm unsure if the stock ECU cuts boost if the coolant temp is too low, since the car had an EBC. I wouldn't be surprised if it did though.
Replaced the thermostat with the stock one, and all the problems went away.
re: article on spark advance, that's true if you consider it in isolation. But tuning a car is more than just the spark advance alone.
1) Car is a JDM Evo 8 MR
2) Stock ECU
3) ARC water thermostat
Local conditions are 30-35 degC in the day, between 23-28 degC in the night.
Typical coolant temps are 80-90 degC, depending on traffic. Highway cruising is typically around 80 degC. After installation of the water temp thermostat, it went down to 50 degC. Result? Uneven idling due to excess fueling, poor fuel economy, surging on WOT etc, everything that's indicative of a fueling problem. I'm surprised a CEL was not thrown since the water temp should be fluctuating wildly between cold and fully warm.
I'm unsure if the stock ECU cuts boost if the coolant temp is too low, since the car had an EBC. I wouldn't be surprised if it did though.
Replaced the thermostat with the stock one, and all the problems went away.
re: article on spark advance, that's true if you consider it in isolation. But tuning a car is more than just the spark advance alone.
Joey
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