C4 Low Temp Switch
Thread Starter
Intermediate
Joined: Oct 2014
Posts: 28
Likes: 2
From: Phoenix AZ
C4 Low Temp Switch
I have a 93 Corvette LT1 with 135k miles on it:
I want my engine to be able to run as cool as it can get. I just previously installed a 180* thermostat and have flushed/refilled my cooling system with 50/50 premix. I was looking at this low temp fan switch that claims it can reduce engine temp by kicking in the main fans at an earlier temp than whats stock. In this case at 195* and off at 180*. Is this legit? As in is it worth buying this switch and will it actually work? I know on the 93 Vette's the fans are controlled through the ECM/PCM. Will I be able to kick the fans at an earlier temp with a simple tune or would I have to buy this switch or have to do both?
This is the switch:
http://www.ecklerscorvette.com/corve...1984-1995.html
Thanks guys,
Ray
I want my engine to be able to run as cool as it can get. I just previously installed a 180* thermostat and have flushed/refilled my cooling system with 50/50 premix. I was looking at this low temp fan switch that claims it can reduce engine temp by kicking in the main fans at an earlier temp than whats stock. In this case at 195* and off at 180*. Is this legit? As in is it worth buying this switch and will it actually work? I know on the 93 Vette's the fans are controlled through the ECM/PCM. Will I be able to kick the fans at an earlier temp with a simple tune or would I have to buy this switch or have to do both?
This is the switch:
http://www.ecklerscorvette.com/corve...1984-1995.html
Thanks guys,
Ray
Burning Brakes
Joined: Sep 2014
Posts: 925
Likes: 6
From: East Wenatchee Washington
Kind of a general question that goes along with his - I "assume" that GM must have made these cars "run hot" on purpose. Are we defeating that purpose by forcing our cars to run cooler?
I feel the same - sitting in a drive-through line in mine, seeing it bounce up to 230 and listening to the fans finally kick in just drives me batty. BUT, if there was a real reason for it, I want to leave mine alone. Otherwise, I'll probably start (before next summer) trying to get mine to run cooler too. '94 in my case.
I feel the same - sitting in a drive-through line in mine, seeing it bounce up to 230 and listening to the fans finally kick in just drives me batty. BUT, if there was a real reason for it, I want to leave mine alone. Otherwise, I'll probably start (before next summer) trying to get mine to run cooler too. '94 in my case.
Racer
Joined: May 2012
Posts: 392
Likes: 19
I bought one of those because i was also concerned about the high temps, however you have to pull a plug out of the drivers side head to install their sensor.. It's impossble to remove without draining the coolant, using a torch to heat the plug and try to remove it. I could not get the plug loose so i decided not to do it. I would advise to leave it alone as it's designed to run hot anyway.
Pro
Joined: Oct 2010
Posts: 603
Likes: 45
From: Baltimore County MD
Running temps
I have a 93 Corvette LT1 with 135k miles on it:
I want my engine to be able to run as cool as it can get. I just previously installed a 180* thermostat and have flushed/refilled my cooling system with 50/50 premix. I was looking at this low temp fan switch that claims it can reduce engine temp by kicking in the main fans at an earlier temp than whats stock. In this case at 195* and off at 180*. Is this legit? As in is it worth buying this switch and will it actually work? I know on the 93 Vette's the fans are controlled through the ECM/PCM. Will I be able to kick the fans at an earlier temp with a simple tune or would I have to buy this switch or have to do both?
This is the switch:
http://www.ecklerscorvette.com/corve...1984-1995.html
Thanks guys,
Ray
I want my engine to be able to run as cool as it can get. I just previously installed a 180* thermostat and have flushed/refilled my cooling system with 50/50 premix. I was looking at this low temp fan switch that claims it can reduce engine temp by kicking in the main fans at an earlier temp than whats stock. In this case at 195* and off at 180*. Is this legit? As in is it worth buying this switch and will it actually work? I know on the 93 Vette's the fans are controlled through the ECM/PCM. Will I be able to kick the fans at an earlier temp with a simple tune or would I have to buy this switch or have to do both?
This is the switch:
http://www.ecklerscorvette.com/corve...1984-1995.html
Thanks guys,
Ray
Melting Slicks
Joined: Jan 2008
Posts: 2,054
Likes: 120
From: AZ
It's called emissions and efficiency.
New C4 owners freak out a the 'new' temperatures, versus old cars or those that do not display coolant temperature. Backyard re-engineering of increasingly sophisticated systems is ludicrous, especially with a lack of understanding of all the engineering. It can and has made a fine performance machine into a nightmare.
The newer C4 ECMs will not activate the fan above 35 mph as there is no increae in airflow.
I have concerns about my engine running too cold, some of the cold mornings, which could keep it in open loop; hardly desirable.
New C4 owners freak out a the 'new' temperatures, versus old cars or those that do not display coolant temperature. Backyard re-engineering of increasingly sophisticated systems is ludicrous, especially with a lack of understanding of all the engineering. It can and has made a fine performance machine into a nightmare.
The newer C4 ECMs will not activate the fan above 35 mph as there is no increae in airflow.
I have concerns about my engine running too cold, some of the cold mornings, which could keep it in open loop; hardly desirable.
Burning Brakes
Joined: Sep 2014
Posts: 925
Likes: 6
From: East Wenatchee Washington
It's called emissions and efficiency.
New C4 owners freak out a the 'new' temperatures, versus old cars or those that do not display coolant temperature. Backyard re-engineering of increasingly sophisticated systems is ludicrous, especially with a lack of understanding of all the engineering. It can and has made a fine performance machine into a nightmare.
The newer C4 ECMs will not activate the fan above 35 mph as there is no increae in airflow.
I have concerns about my engine running too cold, some of the cold mornings, which could keep it in open loop; hardly desirable.
New C4 owners freak out a the 'new' temperatures, versus old cars or those that do not display coolant temperature. Backyard re-engineering of increasingly sophisticated systems is ludicrous, especially with a lack of understanding of all the engineering. It can and has made a fine performance machine into a nightmare.
The newer C4 ECMs will not activate the fan above 35 mph as there is no increae in airflow.
I have concerns about my engine running too cold, some of the cold mornings, which could keep it in open loop; hardly desirable.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Race Director
Joined: Oct 2005
Posts: 11,772
Likes: 177
From: Rolla Missouri
2021 C4 of the Year - Unmodified Finalist
St. Jude Donor '10 thru '25
It's called emissions and efficiency.
New C4 owners freak out a the 'new' temperatures, versus old cars or those that do not display coolant temperature. Backyard re-engineering of increasingly sophisticated systems is ludicrous, especially with a lack of understanding of all the engineering. It can and has made a fine performance machine into a nightmare.
The newer C4 ECMs will not activate the fan above 35 mph as there is no increae in airflow.
I have concerns about my engine running too cold, some of the cold mornings, which could keep it in open loop; hardly desirable.
New C4 owners freak out a the 'new' temperatures, versus old cars or those that do not display coolant temperature. Backyard re-engineering of increasingly sophisticated systems is ludicrous, especially with a lack of understanding of all the engineering. It can and has made a fine performance machine into a nightmare.
The newer C4 ECMs will not activate the fan above 35 mph as there is no increae in airflow.
I have concerns about my engine running too cold, some of the cold mornings, which could keep it in open loop; hardly desirable.
