Water Temp 200 degrees F??
- Thread starter tercelica
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OK i got the cooling problem down, fixed it... no fan clutch back to electric... it works now??? i even drove it around no problem EXCEPT ONE PROBLEM!!! I think there is an exhaust leak now... the motor runs normal... quick still... BUT the engine is alot louder than it was before hand. Like where the turbo manifold is.. its LOUD... exhaust leak?? time for a new gasket or something? Bad O2? i'll check the codes to see if i f'd anything up... thanks in advance again
malloynx said:
really then why do peolpe at tracks not even start there cars before a run/ to keep heat soak down as well as temps. higher temps is stricly for fuel economy makes you run lean, lower temps yeild a better combustion allowing you to run "rich" and yes up to a point agreed on that. but also anything that increases horse power over stock of what the vehicle is designed for will shorten engine life but there are ALOT more factors to that than just uping the anty. just my thoughts no offense.
No offense taken.Boss302 said:
The engine runs better 190-200 degrees F. Just as you pointed out, heatsoak is the reason the engine is left off in the staging lanes. When the intake manifold is warm, the air is less dense. If there was a way to keep the engine warm, and intake cool, it would be done. In fact, it has. There are phenolic spacers, ice bags used, and cold air intakes installed.
How can fuel economy go up by a warmer engine but not power? The extra heat makes the engine more efficent. All of the fuel is vaporized, and no liquids burn.
On a fundamental note dealing with heat, it always is trying to transfer to cold. The bigger the difference between hot and cold, the faster the transfer happens. So cool cylinders will absorb a higher percentage of combustion heat(energy) than a warm one. Think compression ignitions.
Point being, a cool intake charge is good. Cool cylinder walls are not.
well... I re-did the electric fans... but instead of just having 2 fans pulling air... i put a third pushing air... the car basically stays at 190-195 now... unless i keep it at idle it goes to like 204... but when i drive.. its all good.. i might have an exhaust leak tho... but i'll check tomorow... when i have time...
Hobbes992 said:
Nick M said:
I agree strongly with Nick's statement, even though in practice I deviated from Toyota's design and went with e-fans like the OP.
The thermostat is important for two main reasons;
First, it helps the engine reach operating temperature more quickly, improving economy & reducing emissions (you do still have your emissions equipment, don't you?) and
Second, it helps control flow through the radiator--hot coolant exiting the engine needs to spend enough time in the heat exchanger (radiator) to lose heat so that it can be an effective heat carrier when it reenters the engine. Make sense? If it goes through the radiator too quickly (imagine high revving driving, spinning that water pump at high speeds for an extended period of time) it doesn't have time to cool enough to take heat away from the engine as it runs through again. This results in raised engine operating temps under load, even though you may see a cooler temperature at idle.
EDIT: Come to think of it, flow rate is as important to heat transfer in the radiator (from coolant to air) as it is in the engine (engine to coolant) itself...
The gauge will not show high heat without the t-stat, but the engine sure as shit will be hot.
As mentioned above, the coolant is not aborbing heat from the engine.
As mentioned above, the coolant is not aborbing heat from the engine.
yeah... anyway's... beside the fact that i got the temp to stay at a good temp... I have a crappy oil leak now... I'm gonna jack up the car tomorow and see wtf i did wrong this time... I fixed the exhaust leak tho..turns out it was my exhaust manifold gasket... took me 4ever to change. I got a new one on and the car is quite as hell... but the leak is buggin me now.. its a BIG leak... like a consistant stream of oil. thanks again tho.... ehhhh sorta sorry for bringing up a touchy subject 
didn't intend on starting a war...
didn't intend on starting a war...
Nick M said:
exactly fuel consumption is higher at colder temps colder though better combustion cause of denser air
Well... I thought I had the temp to stay at 195.. but i was driving the civic because of gas... today i checked out the supra it still slowly goes UP... when it only stayed at 205 and i thought it was fine because i only did it for maybe 15-20 minutes... then it went up... HIGHER... but I now have one new fan and it stayed at 195 for a bit then went up... Maybe because i need to make a shroud?? possibly? but I'm going to buy a second fan (the new one and the next one i'm getting are not HONDA fans anymore... They are actual 16inch fans that I got from my work for a pretty fair price. BUT my NEW question is...
With the 2 NEW fans, would it be better to push air on to the radiator? or Pull Air? I mean which would be best to cool the coolant better or is it the same really? Thanks again... hope it works w/ two fans and a custom shroud... I think it could be the shroud (according to my searches online w/ electric fans). We'll see.... again...
that I got from my work for a pretty fair price. BUT my NEW question is... With the 2 NEW fans, would it be better to push air on to the radiator? or Pull Air? I mean which would be best to cool the coolant better or is it the same really? Thanks again... hope it works w/ two fans and a custom shroud... I think it could be the shroud (according to my searches online w/ electric fans). We'll see.... again...
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