67 Heaven....Did You Ever....

[IH2LOSE]

Think Vacum switch

 

[Viet Nam Vett]

Think Vacum switch

Aaahhh ..Ok I'm thinking...... Mr HVAC... Want to splain me...

 

[IH2LOSE]

Mark if the biggest concern is having the fan go off at speed to take advantage of the air coming across the radiator then you just have to find a Normally closed vacum switch and run the trigger wire (low amprage wire) thru the relay,If the car is sitting at idle the switch is closed.

But as soon as your driving,the vacum swith opens and tuns off the trigger to the relay for the fans,

This again is simular to what we allready have on a standard car as when the motor is at speed the clutch fan opens and lets the fan free wheel.

 

[IH2LOSE]

Actually there is an HVAC part we could use for this and elimanate the sencors in the head, Its just a clamp on aquastat, its a honney well part that has a copper bulb we could slide into the radiator fins to sence the tempiture and it has a cut in temp (that would be our 195) and then it has a differential adjustable up to 150 degrees we would set the diif to 20 and that would be our cut out.so the fan would cut out at 175.

As long as thins unit could read the surface temp of the radiator it would work.

And actually if that fan would allow modulation (if you wanted to get real fancy) I can probably find one to carry the load ampreage of the fan and modulate the fan to high speed at 195 and ramp itself down to off at out diff setting . Cut in =Cut out less differential

Is this what you want to do.

 

[Kid_Again]

This is PERFECT!!!

By the time I next break down in VNV's driveway, I'll have a fix for my fans also.

Carry on.

As you were.

Please, continue.

Better than going to NAPA.

:Twist

 

[Viet Nam Vett]

Actually there is an HVAC part we could use for this and elimanate the sencors in the head, Its just a clamp on aquastat, its a honney well part that has a copper bulb we could slide into the radiator fins to sence the tempiture and it has a cut in temp (that would be our 195) and then it has a differential adjustable up to 150 degrees we would set the diif to 20 and that would be our cut out.so the fan would cut out at 175.

As long as thins unit could read the surface temp of the radiator it would work.

And actually if that fan would allow modulation (if you wanted to get real fancy) I can probably find one to carry the load ampreage of the fan and modulate the fan to high speed at 195 and ramp itself down to off at out diff setting . Cut in =Cut out less differential

Is this what you want to do.

Heh Larry,

That's some good engineering there. I'm on a quest now and I think I might have the answer soon. I'll keep you posted . The wheels are turning and being lubed by Beer...

 

[Viet Nam Vett]

This is PERFECT!!!

By the time I next break down in VNV's driveway, I'll have a fix for my fans also.

Carry on.

As you were.

Please, continue.

Better than going to NAPA.

:Twist

Well I'm now in the process of testing a new Barrier's for the entance and
exit to my drive way. This should help keep unwanted visitors OUT..!!
Here's a Link To My First test of the new Barrier..

http://www.geocities.com/daulquad/barrier.WMV

 

[Rowdy1]

Mark?.............

Well I'm now in the process of testing a new Barrier's for the entance and
exit to my drive way. This should help keep unwanted visitors OUT..!!
Here's a Link To My First test of the new Barrier..

[URL="http://www.geocities.com/daulquad/barrier.WMV"]http://www.geocities.com/daulquad/barrier.WMV[/URL]

I didn't mind driving the truck for you like you asked, but..............can I have a couple aspirin with that next beer before we try it again?

 

[Viet Nam Vett]

I didn't mind driving the truck for you like you asked, but..............can I have a couple aspirin with that next beer before we try it again?

Rowdy man.. I got some 70's style 747 QuaLudes for you to go with that beer...And some Ravy Shankar Music for your Ipod....:L

 

[Rowdy1]

I Got News For You........

Rowdy man.. I got some 70's style 747 QuaLudes for you to go with that beer...And some Ravy Shankar Music for your Ipod....:L

I eat a lude, forget the music, I'll miss the wall in the next barrier test:L otfl

 

[Denney]

Mark, why can't you use something like this?

 

[Viet Nam Vett]

Mark, why can't you use something like this?

Heh Denney,
I' am using something like you have pictured. Mine has an extra hole where I have a Temp gauge mounted.

The problem still remains... The Fan Senser is above the 195* Thernostat and only see's 195* Temps or above. So..trying to get the fans to turn off at 175 or 180* doen't work due to the fact that the thermo will try to maintain 195*

Eeeeeeeeeeeeeeehhh..!! No cuepy Doll...!!
:L

 

[Denney]

Heh Denney,
I' am using something like you have pictured. Mine has an extra hole where I have a Temp gauge mounted.

The problem still remains... The Fan Senser is above the 195* Thernostat and only see's 195* Temps or above. So..trying to get the fans to turn off at 175 or 180* doen't work due to the fact that the thermo will try to maintain 195*

Eeeeeeeeeeeeeeehhh..!! No cuepy Doll...!!
:L

Simple question, Mark, have you thought about a lower temperature thermostat (i.e. 180*)?...:confused Because, even I know that as long as your T-stat is 195* or above, that is the temperature range you will run at (and you will never be at or below 175-180 except at cold start up/warm up)... The only way to get a temperature reading below that (at normal operating temps) is to have the sender installed at the outlet of the radiator...

 

[Viet Nam Vett]

Simple question, Mark, have you thought about a lower temperature thermostat (i.e. 180*)?...:confused Because, even I know that as long as your T-stat is 195* or above, that is the temperature range you will run at (and you will never be at or below 175-180 except at cold start up/warm up)... The only way to get a temperature reading below that (at normal operating temps) is to have the sender installed at the outlet of the radiator...

Aaah Soo ..Grass hoppeer.... When you are using the Super Duper Dewitts Rad With To Spall Fans... The water Temp at the bottom of the rad after cooling will be much much lower then 195*... as it enters the water pump inlet...at that point it migrates up to the cyl head ... it shoul still be lower then the outlet temp at the thermo housing ...I betten that it will be low enough at the senser head location to turn off the fans.

Ther should be a temp difference at the senser head location and the thermo housing.

If not..I'll drop it down to 180* and try again. I'm tying to keep the motor at or around 195* to maintane Thermal Design of the motor...

I'll keep you posted...

 

[Denney]

OK Mark, how about an aluminum radiator hose adapter with a sending unit port...?

http://store.summitracing.com/default.asp?Ntt=temperature&searchinresults=false&Ntk=KeywordSearch&DDS=1&N=115&target=egnsearch.asp

Type in "ATM-2282" in the search line...

You can insert it into the return line either at the radiator or at the inlet to the pump (I presume)... Would that take care of your "problem"?