• Got the Contributing Memberships stuff finally worked out and made up a thread as a sort of "How-To" to help people figure out how to participate. So if you need help figuring it out, here's the thread you need to take a look at -> http://www.corvetteflorida.com/forums/showthread.php?t=3581 Thank you, everyone! Rich Z.

C5 Operating Temps

U

Uncle Pat

Has God's Motor
I'm a Ford guy and I know Chevy's run hotter than Fords. Here's what I am seeing. Granted this is during the middle of the afternoon on Waters Ave.The heat index has to be atleast 105 in the sun.

218 running/moving temp. with or with out the A/C running.

229-230 without A/C running at a light. Temp does not climb any higher, and does come down to about 220. Temp will come down with A/C on.
Are these within' proper range??
 
You are seeing what is considered as normal operating temperatures. GM programs the fans on at 228. This is why you won't see anything past 230. Most people want this programmed to run cooler. Your car has a 195 thermostat installed at the factory, so if it stays stock, the coolest it can run will be the 195 area.
 
Uncle Pat said:
I'm a Ford guy and I know Chevy's run hotter than Fords. Here's what I am seeing. Granted this is during the middle of the afternoon on Waters Ave.The heat index has to be atleast 105 in the sun.

218 running/moving temp. with or with out the A/C running.

229-230 without A/C running at a light. Temp does not climb any higher, and does come down to about 220. Temp will come down with A/C on.
Are these within' proper range??
Click to expand...
These numbers look high to me. I'd first look for any air blockage through the radiator. Blow some high pressure air from the back side. You'll be surprised how much junk will fly out. Stick your head underneath and look for any debris (paper, plastic bags, etc) blocking the airflow into the A/C evaporator.
 
very cool thanks....I'm starting to learn this car. This is my first Corvette. I'm 41 yrs old. I deserve this car:yesnod:
 
agreed.

Althought the readings seem normal, i would still follow dave's recommendation and look in all the shroudings up front as a lot of crap gets lodged in the tighest spots. Just for good measure.

Heck just a couple weeks ago as I installed my hearders we found "peach" seeds 2 of them stuck in the intake manifold and valve cover areas :shrug01:

Either the previous owner/mech really loved peaches or some critters got up in there to nest??

:ack2:
 
The previous owner told me he would clean out the front once a week. He said you would be amazed at how much shit comes out of it. I will look this weekend. Thanks and have a good weekend!
 
Yeah, those temps are about what I see as well. Actually have seen 235 when sitting in traffic, but I have that STS intercooler sitting in front of the radiator. Last time I had the car down at AntiVenom, I asked Greg to blow out the radiator fins for me and he said all kinds of crap came out. That certainly made a big difference, though. Driving temps dropped down at least 10 degrees.

That being said, I have bought a 160 degree thermostat. I don't think it will help in ALL instances, but I do think it will help in SOME. Probably will have the radiator flushed at the same time.

Some of the aftermarket higher capacity radiators claim a guaranteed 20 to 40 degree drop in temps, so maybe looking into that would be worthwhile. I know those high temps are supposed to be normal for a vette, but I just don't like it. Higher temps just accelerate deterioration of so many things.....

But on the other hand, I do recall reading a thread not long ago where some people were claiming that COOL temps were likely to accelerate engine bearing surface wear........... :crazy03:

So who knows??? :shrug01:
 
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very cool guys. Like I said, I never ran a stang over 200-210. Anything over that I would shut down. I appreciate the peace of mind. I learning that these cars have noisy drive train and run hotter than fords...

Have good weekend.
 
GM wants the temps that high due to emissions. Higher engine temps burn cleaner according to them. As a matter of fact Smokey Yunick liked to run his engines quite hot as well, he claimed better power production at high temps. As far as my opinion, I really like a car to run between 190-200. Now to get that it is usually only setting the fan in the programming to get there. My road race customers regularly run their stock 01-04 Z06's up to 250 degrees. I have had their engines apart, and they sure are clean and the wear is right on where it should be. Temps really are not that bad since we are using synthetic oil. Breakdown of viscosity is nowhere what it was years ago with conventional oil.
 
I guess in a perfect world, we would have really hot oil, and really cool air temps going into the heads.

How much does the higher temps affect how the PCM handles ignition? I thought I read somewhere that the PCM retards spark for every so many degrees over a certain limit....... :shrug01: I'm assuming this is sampling coolant temps...
 
Most all the LS1 LS2's that i have owned run around 220 to 225, in traffic.

Had a LT1 that would go over 235!
 
Rich Z said:
I guess in a perfect world, we would have really hot oil, and really cool air temps going into the heads.

How much does the higher temps affect how the PCM handles ignition? I thought I read somewhere that the PCM retards spark for every so many degrees over a certain limit....... :shrug01: I'm assuming this is sampling coolant temps...
Click to expand...
Actually, the PCM pulls timing according to air temps first. According to coolant, it doesn't start pulling timing until 230 degrees. At 230 it pulls 1 degrees at .32 grams per cylinder airmass and greater. At 239 degrees and hotter it pulls even more agressive ending with pulling 6 degrees at greatest end of the table(284 degrees at 1.20 grams per cylinder airmass) As far as timing removed for air temps, it starts pulling 1 degree at 98 degrees .32 g/cyl and greater. This explains one of the reasons that cold air kits work so well.
 
Uncle Pat said:
I'm a Ford guy and I know Chevy's run hotter than Fords. Here's what I am seeing. Granted this is during the middle of the afternoon on Waters Ave.The heat index has to be atleast 105 in the sun.

218 running/moving temp. with or with out the A/C running.

229-230 without A/C running at a light. Temp does not climb any higher, and does come down to about 220. Temp will come down with A/C on.
Are these within' proper range??
Click to expand...

Uncle Pat, What you're seeing is average for most late model Vettes. When you are sitting in stop and go traffic, turn on your A/C, this will turn on the fans. You can replace your factory t/s(190) with a 170 or a 180.

And AntiVenom knows their stuff.

Joe B.:thumbsup:
 
yes....I know turning the A/C in any car automatically turns on a set of fans. Like I said. These cars run hotter than most. I think I will be getting a tune on it shortly. Are these engines/ computers the same as far as hand held flasher units? My 06GT needed a tuner for everything and everything from gear swaps to CAI. Should I buy a CAI and then tune it to start? Then as I mod I can break out the tuner and program in my mod....and of course change the on/off times of the fan if it bothers me that much.
 
Have Antivenom install a 160 thermostat and tune and adjust your fan speeds and you'll be good to go. CAI work great. My veraram really kicks in on my 07. Ligenfelter and Callaway Honkers are excellent too. Mark
 
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