3rd Gen / L98 Engine Tech 1982 - 1992 Engine Related

160 or 180 thermostat?

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Old Sep 10, 2003 | 12:10 AM
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dj haf's Avatar
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160 or 180 thermostat?

im having overheating problems and i wanted to know which one to go with if i have to replace my stock thermostat. any mods on turning on the two fans whenever i please? thanks guys
Old Sep 10, 2003 | 07:28 AM
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i ran a 160 for several years without any problems in my iroc down here in florida. and i even drove it to NY for a christmas and was driving in near 0 degree weather without any problems (besides little longer to get HOT air from the heater).

there are a few pages out there that illistrate how to rig up a fan switch on a 4th gen, not sure about the 3rd's...but there must be.

i know i just rigged one fan to run off of my fog lights, so if i got caught in traffic or whatever i would just flip on the fogs and it would cool the car down nice. i also put a switch inline with the fan so that i could disconnect it if so desired...if i was on open highway and wanted the fogs but not the fan. worked great for 3 years.

there is also a module that i thnk is made by JET that turns your fans on at lower temps. i know summit sells them pn: jet-60600
Old Sep 10, 2003 | 08:02 AM
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Just my opinion, using a Fastchip Stage ll that controls the fans and was informed by Ed Wright that a 180 deg Stat was best for year around in a cooler climate.
Old Sep 10, 2003 | 08:17 AM
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Read one of my articles, whichever is applicable:

http://www.thirdgen.org/techbb2/show...hreadid=170903
Old Sep 10, 2003 | 09:16 AM
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i heard 160 waste gas and could cause engine problems down the line... should i just get a 180? in miami, it's about 90+/- degrees every day in the summer... fall and spring get around 80, and in winter, it's normally in the 70's with days where it goes down to the high 50's or 60's just for a day. maybe that would help in deciding what thermostat to go with?
Old Sep 10, 2003 | 10:20 AM
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What a great article on cooling fans. Thanks for posting that Willie.

Old Sep 10, 2003 | 01:15 PM
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I'm also using a FastChip Stage II and I was told that I had to use a 160* thermostat to ensure that engine detonation doesn't occur. Is it really ok to use a 180* instead, if so it'd be great for the winter when it takes forever for the car to heat up inside.
Old Sep 10, 2003 | 02:53 PM
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Originally posted by Smooothie119
I'm also using a FastChip Stage II and I was told that I had to use a 160* thermostat to ensure that engine detonation doesn't occur. Is it really ok to use a 180* instead, if so it'd be great for the winter when it takes forever for the car to heat up inside.
That is what Ed wright of Fastchip said when I asked about 180 deg stat. Also with that chip one fan comes on & stays on until you are over 35 mph. Its helped me in trafic and I have been using that chip for 2 yrs now.
Old Sep 10, 2003 | 04:20 PM
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I use a 160. I have had fasterproms burn me a new chip when I had stuff done and they set the fans to come on at a lower temp. Works well in the winter too
Old Sep 11, 2003 | 01:21 PM
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This is what I have done in my truck and want to carry it over to the car (same design if I can):

1)I took out the stock clutch fan, replaced with Flex-a-lite 250 fans (came with it's own controller box).
2)Put in 160 degree thermostat
3)Installed Hypertech thermomaster so that the comp would know a 160 was installed.

Im wondering if I can just do the same thing with the Camaro. Obviously, the setup in my truck (electronically speaking) is different than the Z28. My truck's ECM doesnt give a crap about the coolant temperature as well as it has no switch (everything involves the clutch fan and the thermostat).

But it seems to be a different story with the Camaro. I have been researching to find whether or not I can put in flex 220 fans (with controller), 160 thermo, and Hypertech chip (for fuel mixture at 160 dgrees, just like in the truck) and call it a day. I assume I could bypass the AC's pressure switch and just wire it in like my truck, where the fans come on when the compressor turns. I also assume that the various switches and whatever will not go crazy when it finds that the car keeps a constant 160 temp.
Old Sep 11, 2003 | 01:31 PM
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I have a 160 that I haven't installed yet. Do I need to get the chip before I put this in?
Old Sep 11, 2003 | 05:34 PM
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I've heard that putting a 160* thermo in with the stock computer will cause the engine management system to go kinda haywire. Hopefully someone here can clarify this with more detail. I was told that it had somethin to do with the fact that the ECM would try to compensate for the fact that the engine wouldn't be operating at normal temp (which I believe is between 195-200 degrees). Basically, the 160* thermo causes the engine to never reach normal operating temp, and the stock ECM recognizes it as a prob.
Old Sep 11, 2003 | 05:39 PM
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Probably would screw up the computer's game plan. In any case, the stock GM EPROM is too mild. Mine was aftermarket and they burnt it to my specs, took readings and made adjustments to the program, took more readings and made final adjustments.
Old Sep 11, 2003 | 06:29 PM
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Originally posted by Smooothie119
I've heard that putting a 160* thermo in with the stock computer will cause the engine management system to go kinda haywire. Hopefully someone here can clarify this with more detail. I was told that it had somethin to do with the fact that the ECM would try to compensate for the fact that the engine wouldn't be operating at normal temp (which I believe is between 195-200 degrees). Basically, the 160* thermo causes the engine to never reach normal operating temp, and the stock ECM recognizes it as a prob.
Im pretty sure you are right.
At least I know for a fact that it does this in my truck (both OBD if that makes a difference anyways).
Old Sep 11, 2003 | 06:32 PM
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Plus I assume it would be false advertising if Hypertech and others claim that it makes use of a 160 degree thermo, when the computer doesnt even care.



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