Wednesday, May 28, 2008 - 01:59 pm, by: Dave Cazes(Cazman)
So who can supply TRD ones too? I would prefer a stock temp one atm because its a daily driver, I need to know so i can stage my thermos properly thats all, so i need to know for sure what temp they open at
I was considering changing my thermostat also but im not sure if there is any real benefits from doing this... perhaps there was in old school cars but in the modern 1jz? Who knows.
I hear it is a royal pain in the ass to change on the TT also. I dont even know where it is. I have converted to single though so it may be easier to get to.
Peter Nitschke Junk Filterer South Australia UZZ30 UZZ31
Saturday, May 31, 2008 - 04:00 pm, by: James Harris(Haro)
YUK !!
In that case it can STAY where it is haha.
I also thought that by by changing the operating temp of an engine could make it run less efficient. As these engines are well engineered and EFI should maintain a constant temp for the best fuel efficiently.
I have not researched any of this , these are just things i have heard in the past.
*puts flame proof jacket on*
Peter Nitschke Junk Filterer South Australia UZZ30 UZZ31
Saturday, May 31, 2008 - 05:04 pm, by: Peter Nitschke(Pen)
Run it a bit cooler, and the ECU should advance timing a bit and richen the mixture. Poor mans power-up, but at the cost of fuel economy.
Easier done with a switchable resistor on the ECU temp sensor (there are 2 sensors, one for the temp gauge), then at least you can switch the power-up off for non-hoon driving.
Saturday, May 31, 2008 - 05:31 pm, by: Daniel Clarke(Dieseltrain)
James it is a piece of cake!
Jack car up, and go from underneath! Just need a really long extension and Deep 12mm socket! 2 x 12mm bolts is all!
Drain Coolant using tap on radiator. Undo bottom hose from thermostat housing ( dont need to, can leave it attached). remove 2 x 12mm nuts on housing, remove housing!
Saturday, May 31, 2008 - 06:49 pm, by: Peter Nitschke(Pen)
So in effect, engine temperature hasn't really been changed, but you are keeping the coolant cooler?
The ECU temp sensor may be reading the engine temp better as opposed to the gauge sensor that reads coolant temp.
I had a switchable resistor on the ECU sensor for a while, and on the V8 at least, it definitely made a difference, though this didn't show on a dyno - as was expected, as it's mainly changing the power characteristic below where a dyno starts to measure.
Saturday, May 31, 2008 - 10:28 pm, by: James Harris(Haro)
Piece of cake hey Daniel !? Thats what i was told when i had to change my boot struts... BAH that was a mission and half!
Its all good but im not really planning on doing this mod anyways as i am sceptical about the performance or engine longlivity (spelling?) this would give anyways. I have never had a drama with my car running hot... SOOO "if it aint broke..."
Interesting topic though none the less.
i think i WILL disconnect the heater hoses going to the inlet manifold though when i get home.
Monday, June 02, 2008 - 07:27 am, by: Jeff Bedsor(Jeff_bedsor)
You need to be careful of the water temp, from about 75C to 95C on a aftermarket temp gauge the stock gauge does not move from the centre mark. I found that fitting the TRD thermostat dropped coolant temps from about 90C to 80C or a touch less depending on the day.
Tuesday, September 30, 2014 - 12:17 pm, by: Brett Harrison(Bretto)
Hello Rick thanks for that,
The Tridon thermos are fine. The good thing is that they are colder but high flow as well. Last time I checked they didn't have a 72 degree for the v8 only a 76.5, might have to check again.
Friday, October 03, 2014 - 07:48 pm, by: Shane Haverkamp(Havabeer)
does this do anything to the cpu for chewing a bit more fuel?
i could be totally bullshitting here but i'm not sure if the ecu still see's the coolant temp being lower then proper operating temp and might let in just a tiny bit more fuel
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