'92 LT1 fan set point change ?
Thread Starter
Race Director
Joined: Aug 2004
Posts: 15,309
Likes: 2,265
From: NorCal
'92 LT1 fan set point change ?
I think I have heard that there may be two different ways to change the fan set points on the '92 to '96 LT1 C-4's. The first is the reprogramming option; the second is by using a different sending unit to "trick" the fans into coming on sooner.
It is that second method I am interested in learning more about. Does any one have experience with or sources for the replacement sending units?
I understand the LT1 motor has two sending units - one for the the digital gauge and one for the analog gauge, and that one of them controls the fans. Which one controls the fans, and how hard is it to replace? Hopefully it would be the one for the analog gauge, as I like to use the digital display while driving and keep it set on coolant temperature.
So -
Which sending unit to replace?
Sources?
Thanks!
It is that second method I am interested in learning more about. Does any one have experience with or sources for the replacement sending units?
I understand the LT1 motor has two sending units - one for the the digital gauge and one for the analog gauge, and that one of them controls the fans. Which one controls the fans, and how hard is it to replace? Hopefully it would be the one for the analog gauge, as I like to use the digital display while driving and keep it set on coolant temperature.
So -
Which sending unit to replace?
Sources?
Thanks!
Pro
Joined: Jan 2005
Posts: 520
Likes: 0
From: Richmond Va
Le Mans Master
Joined: Mar 2004
Posts: 8,700
Likes: 298
From: Ft. Lauderdale Fl
Hypertech Power programmer's are expensive for only doing one task....
changing temps that the fans come on at.
Solution to your problem is, purchase a "used" Hypertech Programmer", reset your fans and resell it. I purchased one for $87.00.---used it to reprogram the fans and then resold it for just over $100.(ebay).
You can also purchase a manual switch to bring the fans on when you want. Ecklers sells the switch cheap.
You can purchase a chip from "pcmforless" that will do the same.
changing temps that the fans come on at.
Solution to your problem is, purchase a "used" Hypertech Programmer", reset your fans and resell it. I purchased one for $87.00.---used it to reprogram the fans and then resold it for just over $100.(ebay).
You can also purchase a manual switch to bring the fans on when you want. Ecklers sells the switch cheap.
You can purchase a chip from "pcmforless" that will do the same.
Burning Brakes
Joined: Sep 2005
Posts: 953
Likes: 0
From: Wesley Chapel FL
http://www.parts123.com/parts123/yb....Z5Z5Z50000050F
Le Mans Master
Joined: Sep 2002
Posts: 8,991
Likes: 2
From: Hanger 18 Taxachusetts
Hypertech Power programmer's are expensive for only doing one task....
changing temps that the fans come on at.
Solution to your problem is, purchase a "used" Hypertech Programmer", reset your fans and resell it. I purchased one for $87.00.---used it to reprogram the fans and then resold it for just over $100.(ebay).
You can also purchase a manual switch to bring the fans on when you want. Ecklers sells the switch cheap.
You can purchase a chip from "pcmforless" that will do the same.
changing temps that the fans come on at.
Solution to your problem is, purchase a "used" Hypertech Programmer", reset your fans and resell it. I purchased one for $87.00.---used it to reprogram the fans and then resold it for just over $100.(ebay).
You can also purchase a manual switch to bring the fans on when you want. Ecklers sells the switch cheap.
You can purchase a chip from "pcmforless" that will do the same.
Once you use it to reprogram YOUR car, it is useless to the next guy unless you set your back to stock. When buying a used one be sure to ask if it was returned to stock. Hypertech wont help you if it wasn't so you waisted your money.
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
Yep, that's how Hypertech works.
It stores a modified program in the unit, and all it does is swap it's program for yours (after reading your VIN number into it's memory). From that point on, the only program in the unit is your old one. The unit will not work on any other car now.
To make it work on another car, you have to return your car back to it's stock program.
Thread Starter
Race Director
Joined: Aug 2004
Posts: 15,309
Likes: 2,265
From: NorCal
That's EXACTLY what I was looking for!
Your link didnt work but im assuming you meant this.
http://www.parts123.com/parts123/yb....Z5Z5Z50000050F
http://www.parts123.com/parts123/yb....Z5Z5Z50000050F
