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#1 |
![]() Join Date: Oct 2019
Location: Mansfield, TX
Posts: 148
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Question - what is normal engine temp behavior in Texas summer weather 100 degree plus temperature?
My 1992 runs cool - 180 or less at highway speeds. During in city driving in the Texas summer heat 100 plus temps, the temp gauge will get close to the danger zone. Same if weather cooler and driving hard like on a road course such as NCM Motorsports track. Replaced both fan relays. Car has never overheated. Appreciate y'all's help. Thanks, Gary .... ![]() |
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#2 |
![]() ![]() Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,792
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#3 |
![]() Join Date: Nov 2018
Location: Prescott Valley, AZ
Posts: 11
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I?m not in Texas, but frequently see 95* here in Prescott AZ @ 5200? elevation. City traffic with AC running engine temp will rise to about 221* before fans must kick in and bring temp down to about 207. Mountain driving shows the same high temp before slowly coming back down. I?ve never seen a temp above 223* so nowhere near the shaded zone on the analog gauge. I?m at 101500 miles with original radiator, but have thought about pulling it to see if debris has built up between the condenser and radiator.
Chuck |
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#4 |
![]() Join Date: Jul 2020
Location: Nashville TN
Posts: 317
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Make sure your water level is full. My car has a leak in the recovery tank and I know water is low when I start seeing temps on the rise.
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#5 |
![]() Join Date: Apr 2007
Location: Lake Bluff, IL
Posts: 2,066
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I believe that when Marc Haibeck does a chip for a ZR-1 he sets the fans to turn on at 205 degrees. --Bob
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2016 Long Beach Red Z06 #10281 "POPS Z" 1995 Polo Green #409 "WARP TEN"--Haibeck 350/510 package, 4.10s, Hurst, Stock Exhaust with QTP Cutouts --Sold but still running strong 1993 Quasar Blue #161 "HIL KING" --Sold but still running strong, now with more than 120,000 miles 1967 Marlboro Maroon/Saddle Corvette Coupe 300 hp/4-spd --Sold a long time ago ZR-1 Net Registry Founding Member #95 NCM Lifetime Member Favorite Quote--Attributed to Mickey Thompson: "Too Much Horsepower is Almost Enough" |
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#6 |
![]() Join Date: Oct 2019
Location: Mansfield, TX
Posts: 148
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Dynomite,
GRRRREAT read - appreciate the link(s). Many thanks, Gary .... |
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#7 |
![]() Join Date: Sep 2016
Location: Ocala, FL
Posts: 889
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Yes make sure black tank is full and white tank a 1/2 inch above line. Replace radiator cap if it is 30 years old. After a plenum pull recently I filled it and then noticed temps higher than normal. It was down 2-3 pints.
Yes you must pull radiator every 50,000 miles to clean it. Here in FL sand jams in the fins from following other cars too closely. It is surprising how much it scoops up.
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Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much. |
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#8 |
![]() Join Date: Feb 2021
Location: Katy, Texas
Posts: 22
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I don?t remember the exact numbers, but last year I was pegging the temp gauge during the Houston heat of June/July. I ended up pulling the radiator for a good cleaning, put in Marc?s thermostat & chip, flushed the entire coolant system, and refilled with green coolant. Both the analog and digital temp gauge have been solid in the safe zone since then, even with long drives in 100+ degree heat.
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1991 ZR-1 Dark Red Metallic/Black #1648 ![]() 1973 Stingray Black/Black #421. ZZ4 with Holley Sniper EFI, Tremec TKO-600 5 speed, 3-row aluminum radiator, 18? Foose legend wheels, + lots more. |
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#9 |
![]() Join Date: Oct 2019
Location: Mansfield, TX
Posts: 148
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Temp update
June driving on I45 stop'n'go traffic in Houston area - '92 turned off the A/C and regular temp gauge was in the "danger zone". Since then: 1) installed Marc's chip to turn on fans at 205 2) replaced radiator with 2 row DeWitt's radiator Short test drive this morning went well. Ambient temp was 88 degrees. - Idled with A/C on while filing up with gas & temp got up to 230 - Drove back home - Idle for 15 minutes in driveway with A/C on and temp digital gauge showed 240 Checked top of radiator with temp gun and it showed 140 degrees. Is there an easy way to tell if the passenger side radiator fan is on? I'm having a hard to seeing the fan blades to tell if they're moving or not. Thanks, Gary .... ![]() |
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#10 |
![]() Join Date: Sep 2016
Location: Ocala, FL
Posts: 889
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Tape some thick paper to end of something and slide it down there slowly. Like clothes pinning a baseball card to make noise on bicycle spokes when I was a kid. Or was I the only one that did that?
__________________
Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much. |
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