fans

[bearman]

who runs electric fan and how did you hook it up

 

[wyrmrider]

I run auxiliary pusher fans with relay heaven
temp sender with relay that turns fans on when motor gets hot
and
a pressure sensor on the AC that turns them on when AC needs the flow- this happens much more often than engine temp- it's easier just to wire fans to come on whenever AC is on- with a relay
electric fans really help the AC- you can feel the difference in output (we don't need no stinking heat probes)
and
I have a mechanical spedo and inserted a centrifugal switch in the cable (from a 73 400 vac advance eliminator the one that did not turn on vac advance till you were going 30 mph)
which turns the fans off around 30 mph
temp
Mechanical fan clutch is as specified in a 92 service bulletin where they went from 7 3" pitch blades to 9 2 1/2" pitch blades (from memory so may be off a little but ratio is right) and to a clutch fan that turns on 195 instead of 185
The original fan sounded like a- well really noisy and came on every stop light- it would go off once you got moving- new set up hardly comes on at all but moves more air when it does

 

[PurpleBeeper]

I have not had good luck with electrics, but since you're in Phoenix, keep your mechanical and shroud an hook up a couple small pusher fans in front of A/C condenser. I like wyrmrider's idea to wire them in with the A/C since you'll almost always have it on.

 

[451Mopar]

who runs electric fan and how did you hook it up

Used the Dakota Digital PAC-2750 Fan Controller and was happy with it.
http://www.dakotadigital.com/index....t_id=852/category_id=403/mode=prod/prd852.htm

I originally used the Ford Contour cooling fan module and it worked until I installed the A/C.
I switched the thick Champion 4-core radiator to a thinner 2 core Griffin radiator, and installed dual 13" Spal fans.
With all the changes to the car, the fans are now controller with the EFI controller.
Still working on the wiring, so not sure how much difference the changes will make?

 

[Yatzee]

who runs electric fan and how did you hook it up

I run 5 fans in total, 1-16" for the radiator, 2 -6" for auxillary engine cooling and 2 - 4" fans for the tranny cooler. They all have their separate temperature sensors and are controlled thru two PAC 2750 controllers. Fans come on and off at preset temps and the rad fan has a two minute run-on after the car is shut off to clear hot soak. All run through relays controlled by the PAC 2750's. At speed on the highway the engine cooling fans shut off completely. The reason I went this way is because my thermostat, a 160 degree type, does not actually control the engine's top temperature, rather the controllers do. The engine controllers are set at 187 on and 179 off and the tranny cooler fans engage at 175 degrees. So you see, the full-flow stat is wide open at 160 degrees giving me a big buffer for cooling on really hot days and when it's cooler the engine runs just fine without the fans until it reaches 187 degrees. Total draw when all fans come on (main rad fan is soft-start) is 49 amps, running continually they only draw 27 amps. But on and off presets are staggered in settings so there is no really big draw at any one time.

 

[wyrmrider]

What vehicle Yatzee- sounds like a well thought out installation
problem with 160 degree stats is that the oil may not get hot enough to evaporate water condensation- monitor your oil
For tranny coolers going to half inch lines and a (plate)
cooler with half inch in and out makes a BIG difference
we did testing
note that Chrysler went to half inch lines on the diesels- there is a reason

 

[Yatzee]

What vehicle Yatzee- sounds like a well thought out installation
problem with 160 degree stats is that the oil may not get hot enough to evaporate water condensation- monitor your oil
For tranny coolers going to half inch lines and a (plate)
cooler with half inch in and out makes a BIG difference
we did testing
note that Chrysler went to half inch lines on the diesels- there is a reason

The minimum engine temp shown on my Autometer is 179 and I run synthetic oil. This is average across the board. I also run a good crankcase ventilation system incorporating a M/E Wagner PCV. I cannot see 1/2 tranny cooler lines if the outlet and inlet fittings on the tranny are 3/8. The cooling lines are 3/8 cupra-nickel which expels a lot of heat on their way to the 6 x 20, 4-pass cooler up front, which by the way, is off a 2010 F-150 4x4 FX4. Doesn't get much more capable than one of those coolers especially with a pair of 5 1/2 Spal fans mounted on it. I rebuilt the tranny to handle the high HP and a laser heat gun on the return line shows only 153 degrees after a hard run. The tranny pan is the aluminum deep style with cooling pipes running through it front to back.

 

[bearman]

Thank you all great ideas will consider all when i get to that point. I'm just collecting information from all the different forums to help build my project.

 

[wyrmrider]

put a pressure gauge B4 and after the cooler and at the return then switch to 1/2 inch lines
I bore the trans out and use larger fittings but still not half inch but even so the short small section is not as restrictive as the lines with all the bends
you can also time how long it takes to flow a quart
I'm running an od and the return oil cools the thrust washers and od
thrust washers are the largest source of failure in the od
when I build a trans I also grind the surface hardness off the shaft where the holes are and open them up
250k miles with lots of towing on a rebuild after 30 k with stock trans

 

[bearman]

I don't know for sure but does earls fittings have 3/8 to 1/2. So don't have to do the grinding

 

[wyrmrider]

U sure you have 3/8 The OD trans had 3/8 except maybe really early
TF is 5/16
I just use plumbing supply brass or SS fittings

 

[bearman]

I will double check on mine. The trans i have came out of a 78 motorhome. So not sure what it has trying to get the best input so I don't have to pay twice only once. Budgets are a pain in the butt.

 

[bearman]

I know that i will be using transyn fluid its great fluid use it in all heavy equipment.

 

[wyrmrider]

78 motorhome trans should have all the good parts
transgo reprogramming kit stage II
deep pan from an OD but you have to find or make a spacer for the filter
Citgo makes the best transend type fluid
http://www.docs.citgo.com/msds_pi/965643.pdf
https://www.citgolubes.com/do/produ...TRAIN_FLUID/QUATRASYN_SYN_TRANSMISSIONN_FLUID

For the poster recommending the FORD as a good source of good coolers
X2

 

[bearman]

78 motorhome trans should have all the good parts
transgo reprogramming kit stage II
deep pan from an OD but you have to find or make a spacer for the filter
Citgo makes the best transend type fluid
http://www.docs.citgo.com/msds_pi/965643.pdf
https://www.citgolubes.com/do/produ...TRAIN_FLUID/QUATRASYN_SYN_TRANSMISSIONN_FLUID

For the poster recommending the FORD as a good source of good coolers
X2

Like thee read on the trans fluid. It reads good will put this to my must do list when i get to that
Point.