Skip to main content ↑ ↓
Topic: Thermo Valve Conversion Kit (Read 2459 times) previous topic - next topic

Re: Thermo Valve Conversion Kit

Reply #25 –
My question on the wax controller, is why did Foretravel use the 180 and other MFG used the 199, could it be Foretravel did not want heat the transmission to almost 200 degrees before the retarder was engaged,as most other units do not have a retarder.
 Just a thought.
The selected media item is not currently available.Bill&Doris 97 U270 36'
University of Parris Island Class of 66
Semper Fi  Build# 5174 MC#17094

Re: Thermo Valve Conversion Kit

Reply #26 –
There is no purpose in having the fan controller run at high speed until a minimum of 5 degrees F over thermostat full open temperature. PERIOD. 

All that does is have the fan on high/taking high HP all the time once the coolant is up to normal operating temperature.  So, on a 300 mile drive, it would be on high for 280+ miles.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Thermo Valve Conversion Kit

Reply #27 –
Sven do you have a stock exhaust?
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: Thermo Valve Conversion Kit

Reply #28 –
Not sure if it applies to all Foretravel's, but had a sob with a ecu controlled off/low/high fan controller.
Installed a vmspc and made a  intake manifold temp gauge. When water temp fell below 180 f., fan shut off. Problem was that if you used a lot of throttle and increased boost pressure, manifold temps went to an unacceptable 150 f. until water temps rose enough to turn fan on again.
I believe that is why some coaches, [like mine] run on low speed as soon as you start the engine.  Intercooler temps will rise a lot faster that water temps, and even low speed fan will keep manifold temps down.
Jim C.
coachfree, previous 1997, 1999, 2000, and 2003 Foretravels.

Re: Thermo Valve Conversion Kit

Reply #29 –
Yes, you DO need some air flow over the CAC, even if coolant temperature is low.

So, yes, fan speed should be LOW- HIGH, not OFF- ON.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Thermo Valve Conversion Kit

Reply #30 –
Does anyone have documentation as to maximum air intake system temp. This is all I can find.

Bob
The selected media item is not currently available.Bob & Faith Rozek
1997 U320 40'
Xtreme Remodel
2010 Scion XD

Re: Thermo Valve Conversion Kit

Reply #31 –
Quote from: Wattalife54 –
Does anyone have documentation as to maximum air intake system temp. This is all I can find.

Bob
That is also the  max. rise that Detroit Diesel recommends the the Series 60.
Jim C.
coachfree, previous 1997, 1999, 2000, and 2003 Foretravels.

Re: Thermo Valve Conversion Kit

Reply #32 –
Probably is easier on the fan motor seals and parts to run continuously as opposed to start and stop,remember the info that most
wear on a internal combustion engine occurs on startup,same would apply for these fan motors.
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: Thermo Valve Conversion Kit

Reply #33 –
There is absolutely no comparison that can be made between an internal combustion engine and a hydraulic motor, when talking about frequent starts and stops.
The selected media item is not currently available.Bob & Faith Rozek
1997 U320 40'
Xtreme Remodel
2010 Scion XD

Re: Thermo Valve Conversion Kit

Reply #34 –
Installed and ran into a little issue. Temps on the valve are or was set to approx 199-200 degrees... ( I have adjusted 1/2 turn out to hopefully set it at 185 ish).

Main issue. Manifold temps hit 151 degrees on a day of low 70's. pretty high.. I think I need to add the orifice fitting used to allow the fans to turn a little while moving and allow the air to move at lower speeds and lower overall temps.

Sven has had his valve for a little bit and wondering if he has the Orifice fittings installed or no?

Sound thinking on the movement of air in the engine area?

Re: Thermo Valve Conversion Kit

Reply #35 –
Yes, fan needs to run on low even when coolant temperature is below threshold to provide adequate air flow through the CAC.

Also, ideal temperature to cut fan speed to high is 5-7 degrees above thermostatic control. 
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Thermo Valve Conversion Kit

Reply #36 –
Any ideas on how many RPM I should be looking at @ low rpm? .. thinking of adding a needle valve so that it is adjustable,.

Re: Thermo Valve Conversion Kit

Reply #37 –
Quote from: DavidS –
Any ideas on how many RPM I should be looking at @ low rpm? .. thinking of adding a needle valve so that it is adjustable,.
Let your intake manifold temperatures be your guide. I would start by setting it for a  max of ambient plus 20 degrees F. Also, compare intake manifold temperature on low to when it on high.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Thermo Valve Conversion Kit

Reply #38 –
Does the wax controller contain parts that allow fan to run at slow speed?
Chris
1999 U 320 DGFE
Build Number 5523
Chris & Elka Lang
In the field, Lonoke AR

Re: Thermo Valve Conversion Kit

Reply #39 –
The std wax controller as far as I know is never off.  Low up to 185 then ramps up to full high at 199 degrees.

Almost sounds like the dynamatic controller is incorrect or defective. At least that's what Foretravel used and my replacement was from a Beaver owner with 2 of the units new so he sold me one of them

My intake manifold temp is within the m11 spec of plus 30 degrees max.

"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: Thermo Valve Conversion Kit

Reply #40 –
Quote from: Chris m lang –
Does the wax controller contain parts that allow fan to run at slow speed?
Chris

Does not.. Couple things you can do. Add a 1/8 Needle valve which I did to adjust the fan at low or no speed/ Heat

Or they sell adapters that have different size orifices that restrict the fluid flow. Either will work but the needle valve offers adjustment on the road and easy access as the orifices are internal so they would have to be swapped out or drilled to get the correct size that works for what you needed.

All the Valve does is restrict flow at a set temp which allows the fans to cycle.. Great setup btw.. I gained some mph and it was noticeable on our first trip.. I used at least 1 needle space on the gauge less fuel.. that is minimum.. Im thinking more as I am usually over half a tank to get to phoenix and back and it was under the 1/2 mark..

also I was able to adjust the needle valve to get the manifold temps down.. didnt see over 95/97 on the way back from phoenix .. temps were in the 80's. Took some adjustment..

The valve I have adjusted 2 times.. seems it was set at 200 temps so I removed the cap and adjusted it 1/2 turn in. ran around 190/195 so  did another 1/2 turn and hit me in the 175 marks.. going to turn it up 1/4 turn and hope it hits the spot. Turn the screw head in it turns on cooler.... backing the screw head out make it run hotter.

 

Re: Thermo Valve Conversion Kit

Reply #41 –
Fan on high can be a 50 plus hp loss in use.

As DaveS mentioned more power is noticeable as is the improved mpg.  At least  one to maybe one and half mpg improvement was my and bob rozeks improvement.

Lower rolling resistance tires helps that number. 

The rest of the industry uses the 199 full speed fan controller versus the lower temp Foretravel used.
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4