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From: San Diego, CA, Point Loma-Home to the USN & USMC. GOD BLESS OUR TROOPS.
One more question re: Hypertech Programmer
I spoke with the Hypertech tech guy whom told me to make the rev limiter one higher than the shift point; sounds reasonable. My question is: If I am not racing the 1/4 mile, is there any real benefit to adjusting these settings? And is it wise to lower my cooling fan temps? Stock configurations are: Fan 1 on/off at: 227°F/218 °F Fan 2 on/off at: 235 °F/228 °F. I know the benefit of a cooler combustion chamber, so I'm thinking of lower this setting to the first setting listed in the instructions, which is: 195 ° - that will turn Fan1 on/off at: 209/200 °F and Fan2 at 219/210 °F.
The Hypertech guy said the programmer was designed so any selection offered could not hurt my engine. That sounds good, but I'm sure the onus is on me to make the right decision, so any advice based on experience will be greatly appreciated.
Thanks in advance.
RJ3
I have the same programer, and strongly suspect the higher factory fan settings are for emissions- hotter engines run cleaner thru the cats. The Hypertech reprograming that you plan, will probably help performance a little bit and not be harmful to he engine- my opinion. I primarily used the programer to firm up the trans shifting at the 100% level. No adverse impact after 25K miles and alot more fun to drive. Jim
In order to take advantage of the fan settings, you need a 160 or 180 degree thermostat,depending on what setting you choose. The first setting that you are thinking of using won't really make much of a difference. I live in Texas.. and use a Hypertech 180 degree thermostat year round. Works great 194-195 temps.. A 160 degree may be a bit to much in colder climates or winter time conditions.. Many members change out thermostats with the change of seasons every year... Pretty easy job... Another thing to remember is that the cooler thermostat and fan settings will help keep your transmission temperatures down in the summer time... ( automatic transmission).. Heat is the killer of these trannys.. Anything over 200 degrees for prolonged periods, shortens the life of our crappy 4l60e transmissions
Last edited by David426; Dec 10, 2006 at 11:26 AM.
From: San Diego, CA, Point Loma-Home to the USN & USMC. GOD BLESS OUR TROOPS.
Originally Posted by RIJVETTES
I have the same programer, and strongly suspect the higher factory fan settings are for emissions- hotter engines run cleaner thru the cats. The Hypertech reprograming that you plan, will probably help performance a little bit and not be harmful to he engine- my opinion. I primarily used the programer to firm up the trans shifting at the 100% level. No adverse impact after 25K miles and alot more fun to drive. Jim
Thanks, Jim, for taking the time to reply.
That's good to know.
From: San Diego, CA, Point Loma-Home to the USN & USMC. GOD BLESS OUR TROOPS.
Originally Posted by David426
In order to take advantage of the fan settings, you need a 160 or 180 degree thermostat,depending on what setting you choose. The first setting that you are thinking of using won't really make much of a difference. I live in Texas.. and use a Hypertech 180 degree thermostat year round. Works great 194-195 temps.. A 160 degree may be a bit to much in colder climates or winter time conditions.. Many members change out thermostats with the change of seasons every year... Pretty easy job... Another thing to remember is that the cooler thermostat and fan settings will help keep your transmission temperatures down in the summer time... ( automatic transmission).. Heat is the killer of these trannys.. Anything over 200 degrees for prolonged periods, shortens the life of our crappy 4l60e transmissions
Thanks for this info re: the thermostat. I hadn't thought about replacing the stock thermostat, but will look into it. I'm pretty handy with stuff like this, just lite on the knowledge side. I'll have to do some research first and determine if it is a worth while project. Where I live the temperature is usually in the 70's, so I don't know if it is worth changing out the thermostat.