coolant temp switch

Dnyce · 10-02-2010, 04:25 PM

so, i know alot of ppl just add a toggle switch inline when their stock coolant switch goes bad, or when they want the power to turn the fans on whenever they want, but what i want(and what makes the most sense imo) is a fan switch that switches on at a lower temp. i cant imagine that every fan switch comes on at the same temp, or at the very least someone would make an adjustable one for custom applications. but i cant find any info on it. anybody here attempt to do this?

the bike is a '00 750, but this would apply to all bikes id think.

Dnyce · 10-04-2010, 12:02 PM

no one has fooled around with this eh?

ontwo · 10-04-2010, 12:04 PM

Nope, dude. That's out of my league

Dave · 10-04-2010, 01:23 PM

http://www.summitracing.com/search/V.../?autoview=SKU

Blammo. Had one on the shelby. Worked alright, setting it is a bit finicky though.

goof2 · 10-04-2010, 05:41 PM

All I've seen before is what you mentioned, a switch that bypasses the temp sensor and sends power to the fan regardless of coolant temp. Depending on how your bike's fan is triggered it may be more of a pain in the ass to do what you are talking about.

If the fan is triggered off the sensor that sends temp information to the digital display it wouldn't be too difficult to change the electrical value the fan switch sees to make it think the bike is hotter than it really is. On my bike (01 R6) it doesn't work that way. The fan is triggered off of a separate system. Instead of the temp sender it uses a separate thermo switch that trips closed at 105C and trips open at 100C. I would either need to find a replacement that fits my bike and trips at a different set of temps I'm happy with (probably pretty unlikely since most vehicles tend to use similar temps) or modify the existing switch (I'm personally not real comfortable with that).

Check to see how your bike's fan is triggered which should be in your service manual.

Dnyce · 10-05-2010, 12:01 AM

Quote:

Originally Posted by Dave

http://www.summitracing.com/search/V.../?autoview=SKU

Blammo. Had one on the shelby. Worked alright, setting it is a bit finicky though.

sweet, almost exactly what i was looking for, ill do alil more research and see if i can apply it to the bike without too much hassle

Quote:

Originally Posted by goof2

The fan is triggered off of a separate system. Instead of the temp sender it uses a separate thermo switch that trips closed at 105C and trips open at 100C. I would either need to find a replacement that fits my bike and trips at a different set of temps I'm happy with (probably pretty unlikely since most vehicles tend to use similar temps) or modify the existing switch (I'm personally not real comfortable with that).

thats what i really wanted, but so far no luck. it has to exist somewhere tho. maybe i can raid a pepboys lol and find something

Dave · 10-05-2010, 12:43 AM

Quote:

Originally Posted by Dnyce

sweet, almost exactly what i was looking for, ill do alil more research and see if i can apply it to the bike without too much hassle

thats what i really wanted, but so far no luck. it has to exist somewhere tho. maybe i can raid a pepboys lol and find something

oughtta be very easy

nhgunnut · 10-05-2010, 06:01 AM

Quote:

Originally Posted by Dnyce

so, i know alot of ppl just add a toggle switch inline when their stock coolant switch goes bad, or when they want the power to turn the fans on whenever they want, but what i want(and what makes the most sense imo) is a fan switch that switches on at a lower temp. i cant imagine that every fan switch comes on at the same temp, or at the very least someone would make an adjustable one for custom applications. but i cant find any info on it. anybody here attempt to do this?

the bike is a '00 750, but this would apply to all bikes id think.

Over in the Busa world there are a couple ways this is done. One strategy is to move the stock sensor from the cool side of the radiator over to the hot intake line coming off the engine. Its about half way down this page. http://www.rccturbos.com/product-cat...&category_id=3
Another option on the Busa (and I have to assume that there are parallels for other bikes , This appears to work in all of the Suzukis) is to use the fan temp sensor from a Honda Accord which triggers the fan at 185 instead of 205 I think. (it is a direct swap) Also a well used option is switching to a Muzzy or comparable fan the Muzzy is Aluminum so unlike the stock Suzuki fans they don't flex when they get hot. Muzzy also seems to have better Geometry so it appears to move more air.
I actually did all three but the fan ran constantly so I switched back to the the stock sensor in a new location.
An option for gen 1 busas I haven't done but may is to add a second fan from Jeggs or Snitz (they are $50) so you are moving even more air when the fans run.

Dnyce · 10-05-2010, 11:08 PM

Quote:

Originally Posted by nhgunnut

use the fan temp sensor from a Honda Accord which triggers the fan at 185 instead of 205 I think. (it is a direct swap) Also a well used option is switching to a Muzzy or comparable fan the Muzzy is Aluminum so unlike the stock Suzuki fans they don't flex when they get hot. Muzzy also seems to have better Geometry so it appears to move more air.

bingo! thats what i want-you know what years of accords? i could probably figure it out but if u already knew....
my chick has an '02 accord, maybe i rob it for parts lol

thanks!

my fan is steel, so i dont think it flexes like a plastic one would..

nhgunnut · 10-06-2010, 06:55 AM

On the Busa it is 1998 -2005 sub $30 at Pep Bous

10-02-2010, 04:25 PM	#1
Dnyce flyin high Join Date: Mar 2008 Location: cali Moto: 10speed huffy w/cards in the spokes Posts: 2,318	coolant temp switch so, i know alot of ppl just add a toggle switch inline when their stock coolant switch goes bad, or when they want the power to turn the fans on whenever they want, but what i want(and what makes the most sense imo) is a fan switch that switches on at a lower temp. i cant imagine that every fan switch comes on at the same temp, or at the very least someone would make an adjustable one for custom applications. but i cant find any info on it. anybody here attempt to do this? the bike is a '00 750, but this would apply to all bikes id think. __________________ "Racing Is Life, Everything Before and After is Just Waiting" Steve McQueen

10-04-2010, 12:02 PM	#2
Dnyce flyin high Join Date: Mar 2008 Location: cali Moto: 10speed huffy w/cards in the spokes Posts: 2,318	no one has fooled around with this eh? __________________ "Racing Is Life, Everything Before and After is Just Waiting" Steve McQueen

10-04-2010, 12:04 PM	#3
ontwo Designated Drinker Join Date: Jul 2008 Location: shitville Moto: 2009 ZX6R Posts: 1,661	Nope, dude. That's out of my league __________________

10-06-2010, 06:55 AM	#10
nhgunnut gun totin redneck Join Date: Apr 2008 Location: South West New Hampshire Moto: turbo busa 999 Duc Goldwing & Victory Posts: 1,130	On the Busa it is 1998 -2005 sub $30 at Pep Bous __________________ Evolution requires a body count, Count or be Counted!

10-04-2010, 01:23 PM	#4
Dave Chaotic Neutral Join Date: Feb 2008 Location: Cherry Hill NJ Moto: GV1200 Madura, Hawk gt Posts: 13,992	http://www.summitracing.com/search/V.../?autoview=SKU Blammo. Had one on the shelby. Worked alright, setting it is a bit finicky though.

10-04-2010, 05:41 PM	#5
goof2 AMA Supersport Join Date: Feb 2009 Posts: 4,756	All I've seen before is what you mentioned, a switch that bypasses the temp sensor and sends power to the fan regardless of coolant temp. Depending on how your bike's fan is triggered it may be more of a pain in the ass to do what you are talking about. If the fan is triggered off the sensor that sends temp information to the digital display it wouldn't be too difficult to change the electrical value the fan switch sees to make it think the bike is hotter than it really is. On my bike (01 R6) it doesn't work that way. The fan is triggered off of a separate system. Instead of the temp sender it uses a separate thermo switch that trips closed at 105C and trips open at 100C. I would either need to find a replacement that fits my bike and trips at a different set of temps I'm happy with (probably pretty unlikely since most vehicles tend to use similar temps) or modify the existing switch (I'm personally not real comfortable with that). Check to see how your bike's fan is triggered which should be in your service manual.