AC performance mod
#406
Registered User
Well I did this mod the other day. Used a single ball valve on the top heater hose. Seems cooler in the cab for sure, but I will do a test with the meter for actual temp delta. Another note, I have no change in water temp on the dash gauge. I have been driving it for a couple of days now when the ambient air temps are high 90s and no prob yet.
#408
Registered User
I cannot believe this engine (ISB) was engineered to function soley around the dodge heater core. I will call Cummins Atlantic and see what they say about it.
#409
You do that!
And as far as the engineering goes, you got it bass ackwards. Cummins had nothing to do with it. Dodge took advantage of tapping the hottest water for the heater and adding additional flow to the back of the block at the same time, killing two birds with one stone, as 'twere.
But I don't have any data to support that, and don't normally provide it to demanding people anyways even if I did.
And as far as the engineering goes, you got it bass ackwards. Cummins had nothing to do with it. Dodge took advantage of tapping the hottest water for the heater and adding additional flow to the back of the block at the same time, killing two birds with one stone, as 'twere.
But I don't have any data to support that, and don't normally provide it to demanding people anyways even if I did.
#410
Registered User
You do that!
And as far as the engineering goes, you got it bass ackwards. Cummins had nothing to do with it. Dodge took advantage of tapping the hottest water for the heater and adding additional flow to the back of the block at the same, time killing two birds with one stone, as 'twere.
But I don't have any data to support that, and don't normally provide it to demanding people anyways even if I did.
And as far as the engineering goes, you got it bass ackwards. Cummins had nothing to do with it. Dodge took advantage of tapping the hottest water for the heater and adding additional flow to the back of the block at the same, time killing two birds with one stone, as 'twere.
But I don't have any data to support that, and don't normally provide it to demanding people anyways even if I did.
#416
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Join Date: Dec 2005
Location: DFW, TX
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You do that!
And as far as the engineering goes, you got it bass ackwards. Cummins had nothing to do with it. Dodge took advantage of tapping the hottest water for the heater and adding additional flow to the back of the block at the same time, killing two birds with one stone, as 'twere.
But I don't have any data to support that, and don't normally provide it to demanding people anyways even if I did.
And as far as the engineering goes, you got it bass ackwards. Cummins had nothing to do with it. Dodge took advantage of tapping the hottest water for the heater and adding additional flow to the back of the block at the same time, killing two birds with one stone, as 'twere.
But I don't have any data to support that, and don't normally provide it to demanding people anyways even if I did.
#417
That's a good way to do it. I shut oiff the heater core during the summer using a 3-way valve:
http://stuff.is-a-geek.net/PhotoAlbu...ics/CRD_36.JPG
Otherwise it flows out both back head ports to both the filter and heater:
http://stuff.is-a-geek.net/PhotoAlbu...ics/CRD_15.JPG
http://stuff.is-a-geek.net/PhotoAlbu...ics/CRD_36.JPG
Otherwise it flows out both back head ports to both the filter and heater:
http://stuff.is-a-geek.net/PhotoAlbu...ics/CRD_15.JPG
#418
Registered User
Crap! I did the mod to my truck the other day before finding the rest of this thread. I was going off a link to the first page or two of it. Now I guess I need to go rig up a bypass. Maybe next week. For now I'll just leave the valves open, I guess.
#419
Late model Ford Rangers use a 3 port 5/8 heater control valve it is a bypassing valve, unfortunately it is vacuum operated, But if your truck is equipped with a Jacobs vacuum operated exhaust brake one could tap into that vacuum source and run a vacuum solenoid operated by your a/c compressor clutch trigger or your recirculation door servo with a relay because the servo will be controlled by the ground lead from the HVAC Module... Just thinking!!! I will have to confirm the wiring in Mitchell schem.
Or one could just operate it manually like a ball valve...
Or one could just operate it manually like a ball valve...
#420
Registered User
Late model Ford Rangers use a 3 port 5/8 heater control valve it is a bypassing valve, unfortunately it is vacuum operated, But if your truck is equipped with a Jacobs vacuum operated exhaust brake one could tap into that vacuum source and run a vacuum solenoid operated by your a/c compressor clutch trigger or your recirculation door servo with a relay because the servo will be controlled by the ground lead from the HVAC Module... Just thinking!!! I will have to confirm the wiring in Mitchell schem.
Or one could just operate it manually like a ball valve...
Or one could just operate it manually like a ball valve...
For a vacuum operated solenoid, I figured the best approach might be to take vacuum from the recirc door. This way the valve(s) close on Max A/C, but open on all other modes automatically.