C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

right temps for my 95 LT1?

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Old Aug 2, 2005 | 03:40 PM
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Default right temps for my 95 LT1?

I know I saw a past thread where everyone listed their temps, but they were mostly in the 190-195 range it seemed. My 95 LT1 usually runs 210-215 or so while cruising at about 1800 RPM in 88-95degree FL weather. Of course any acceleration brings that temperature up... I have yet to take it on the highway... My question is...with those temps around town... will I be safe to drive on the highway...and how close to that 260 cap is safe? - the GT4 would have blown antifreeze everywhere at 210 - these things run so damn hot and I know little about them or any modern/FI cars. Also - are there some things I can try to bring my temps down? - Or perhaps my injectors may be a little dirty causing it to run a little lean (I don't speak Chevy - so I wouldn't know by listening). I'm going to replace the plugs - so that may tell me.. Thanks for any help.
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Old Aug 2, 2005 | 04:26 PM
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Here's some temps I got from a previous post....

Left work today and took the Vette (96 LT1) on a road trip west of Las Vegas out near Death Valley. The AC was cold and the Vette handled great. Passed quite a few cars climbing through the mountain passes. Outside temps got as high as 129 degrees. Here's some temps I saw on the digital display with the AC on (Totally stock cooling system):

1. Inside cockpit temp before I started 151 degrees (Digital thermometer on the seat.)
2. Highway engine temp 70 to 80 MPH 205 - 215 degrees
3. Highway oil temp 70 to 80 MPH 220 - 235 degrees (Mobil 1)
4. Highway trans temp 70 to 80 MPH 220 - 225 degrees
5. Town (Slow traffic) engine temp in traffic 210 to 230 degrees
6. Town (Slow traffic) oil temp 225 - 239 degrees
7. Town (Slow traffic) trans temp 220 - 230 degrees
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Old Aug 2, 2005 | 04:43 PM
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Originally Posted by 4REGT4
I know I saw a past thread where everyone listed their temps, but they were mostly in the 190-195 range it seemed. My 95 LT1 usually runs 210-215 or so while cruising at about 1800 RPM in 88-95degree FL weather.
It would appear that your temps are not a problem. Depending on your speed at that 1800 rpms, your highway temps may go down, due to increased air flow through the radiator. While you are changing the plugs, remove the upper radiator shroud and clean the debris from between the radiator and condenser. I think you'll be pleasantly surprised.

RACE ON!!!
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Old Aug 2, 2005 | 07:26 PM
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Thank you CFI - I will check that area for cleaning.
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Old Aug 2, 2005 | 07:43 PM
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Although some claim to have tricks to inspect that area, I think it can only be done effectively, by removing the rad upper shroud. Especially for the first time, not knowing exactly what you're looking at.

Also, I forgot to mention, if it has been a while, a good radiator flush and refill can help a lot, too.

RACE ON!!!
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Old Aug 2, 2005 | 07:54 PM
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I just bought the car a month ago and haven't gotten a chance to drive it too much... went on vacation and now just moved... I will be bringing it here next week and flushing the coolant doing oil/filter just in case the previous owner/dealer did a cheapo job or none at all.... As I look over this forum I'm seeing several general maintenance ideas that I will have to check up on. Hopefully the previous owners haven't been too lazy, but it drives real good so there shouldn't be too many blaring issues....
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Old Aug 2, 2005 | 07:56 PM
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I'm glad I flushed my radiator,changed coolant to about 70/30 distilled water,a bottle of water wetter,and a 160thermostat.My hoses and other parts thank me,in this 95-100 FL heat.car runs 175-185 on the highway,depending on speed
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Old Aug 2, 2005 | 07:58 PM
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what were you running before the flush,WW,and thermostat?
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Old Aug 3, 2005 | 10:58 AM
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Originally Posted by 4REGT4
I know I saw a past thread where everyone listed their temps, but they were mostly in the 190-195 range it seemed. My 95 LT1 usually runs 210-215 or so while cruising at about 1800 RPM in 88-95degree FL weather. Of course any acceleration brings that temperature up... I have yet to take it on the highway... My question is...with those temps around town... will I be safe to drive on the highway...and how close to that 260 cap is safe? - the GT4 would have blown antifreeze everywhere at 210 - these things run so damn hot and I know little about them or any modern/FI cars. Also - are there some things I can try to bring my temps down? - Or perhaps my injectors may be a little dirty causing it to run a little lean (I don't speak Chevy - so I wouldn't know by listening). I'm going to replace the plugs - so that may tell me.. Thanks for any help.

My 95 runs the following on highway:

90 deg ambient
OD
AC off
70 mph- 197 deg coolant
60 mph- 201 deg coolant
50 mph- 201 deg coolant

Around town, stop and go, it will easily vary higher depending upon speed, temp etc. 210-215 is not bad. Take it on the highway and see what it does.
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Old Aug 3, 2005 | 03:39 PM
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Mine is always glued to 190-192* while moving. Doesn't matter what speed (within reason) or if AC is on or off. Oil temp runs between 200 and 210 and does go up slightly the faster I go.

Now the average temperature around here is only in the 70s, but even on the odd day we get in the high 80s the car still runs the same temperature.

My car is a 6-speed. Automatics might run a little hotter since the transmission needs to be cooled as well.
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Old Aug 9, 2005 | 05:55 PM
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Well - after flushing the coolant and installing a cooler thermostat - The car is now running 194-200 on the highway and around town - will get close to 205 at a light... even that is cooler than my previous running temperature... these and my original numbers are all with the AC on (It is Florida...)
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Old Aug 9, 2005 | 06:47 PM
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Now all you have to do is to reinstall the stock thermostat, and you'll be all set. As you know the stock stat was 180°. All of your reported temps are a minimum of 14° higher than that. Therefore it is easy to see that the cooler stat did nothing to make your car run cooler. It only made it take longer to warm up. If you think about how a stat works and what it does, you can see that all it controls is the minimum operating temp. It cannot affect the maximum operating temp. Once the stat is open, it's finished, done. It can do no more. Congrats on getting the cooling system maintenance done.

RACE ON!!!
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