AC systems

[Ron Earp]

And exactly where is that allowance, in the ITCS?

Well, along the same vein where in the ITCS is the allowance for a cool suit?

As for the heater:

Ducting may be added to provide fresh air to the driver/
passenger compartment. This ducting shall be located in the
driver and/or passenger window area, with no modifications
to the bodywork. Only the cooling duct is permitted in the
window area. It is not permitted to otherwise fill in the window
area. The complete duct assembly in the plane of the window
shall be no larger than 100 square inches.

I suppose you could argue that your duct comes in feeds a heater/blower and it is delivering air to the driver/passenger compartment.

[Flyinglizard]

I pull the AC parts out of the box, and stuff the heater core back in. (For the It cars.)
For the Chumpcars, I draw warm air off of the floor behind the header, duct it straight onto the glass.
Just a piece of vertcially mounted dryer vent hose ,with the bottom at the floor , maybe 1in gap to the floor works very well. Hot air rises, etc.

[Andy Bettencourt]

Ron, Didn't you say you had documentation that some of these cars you could UD/BD too had no AC? IIRC then THAT is the heater core you could go with.

My strategy on this is simple. Take the AC stuff out of the heater core, make sure the heater hoses are attached and call it a day. The AC is part of the heater core, not vice versa. The core is ALWAYS in there, AC or no AC.

[Ron Earp]

My strategy on this is simple. Take the AC stuff out of the heater core, make sure the heater hoses are attached and call it a day. The AC is part of the heater core, not vice versa. The core is ALWAYS in there, AC or no AC.

I believe that bold section is up for debate and interpretation. While the heater core is always in the car as delivered by Ford, rule:

9.1.3e
Air conditioning systems may be removed in whole or in part.

And Ford considers in their factory shop manual that the heater core is part of the Air Conditioning system, meaning heating and cooling, i.e. conditioning of air. In fact, there is a sentence in the manual that states "The air conditioning system is composed of the following main components: refrigerant compressor, evaporator, condenser, drier, engine coolant heat exchanger, ..." and a few other items I can't remember.

[spawpoet]

I pull the AC parts out of the box, and stuff the heater core back in. (For the It cars.)
For the Chumpcars, I draw warm air off of the floor behind the header, duct it straight onto the glass.
Just a piece of vertcially mounted dryer vent hose ,with the bottom at the floor , maybe 1in gap to the floor works very well. Hot air rises, etc.

That's a really good idea. Simple and lightweight.

[JeffYoung]

I agree with Ron. The rule says the A/C system can come out. The heater core must stay. The book says that big ass thing is an a/c system. It can come out. But, per the rule, the heater core must stay.

I do agree with Gary that there is no allowance for adding a fan, although that type of reading of the rules gets rid of cool systems, radios, etc.

[Andy Bettencourt]

I agree with Ron. The rule says the A/C system can come out. The heater core must stay. The book says that big ass thing is an a/c system. It can come out. But, per the rule, the heater core must stay.

I do agree with Gary that there is no allowance for adding a fan, although that type of reading of the rules gets rid of cool systems, radios, etc.

Sure that is what Ron is saying?

[Ron Earp]

I think one could make an argument that you could stick my heater core through the firewall and hang it in space, with hoses, and be legal.

Sure that is what Ron is saying?

Yep, that is what he is saying.

[Knestis]

We went with a non-AC HVAC box in the Golf but discovered that the fan motor (which died recently) is as rare as hen's teeth and costs a bundle. I think that Andy's interpretation/practice is most consistent with the various - and potentially conflicting - rules.

KK

[Ron Earp]

I do agree with Gary that there is no allowance for adding a fan, although that type of reading of the rules gets rid of cool systems, radios, etc.

Apparently not radios.

9.3.1.j

Audio systems may be removed in their entirety. Two-way
radios are permitted.

[seckerich]

When in doubt, read the GCR. Many things are specified for all cars, not just IT.

9.3.14. COOL SUITS

Cool suits are allowed in all classes. Water tank mounts shall be of a safe

and secure design.

[Streetwise guy]

I am of the supplementary radiator clan, and I'll be using it this weekend, I'm sure. Its over 30*C in the forecast, and even with the biggest rad I could fit in the Neon, it never runs lower than 105*.

[lateapex911]

I pull the AC parts out of the box, and stuff the heater core back in. (For the It cars.)
For the Chumpcars, I draw warm air off of the floor behind the header, duct it straight onto the glass.
Just a piece of vertcially mounted dryer vent hose ,with the bottom at the floor , maybe 1in gap to the floor works very well. Hot air rises, etc.

In my car, that's an ideal way to fog the windshield, LOL. Of course, in my car I have two streams of water flowing into the car off the windshield at 100MPH, and it forms puddles in the footwells. (I've seen breakers on the pass side!) Since my rotary has exhaust temps in the 1600 range 18" off the port, and the pipes must be long for some noise attenuation and to house multiple mufflers, they of course travel under floor, which heats, errr boils, that water, making copious amounts of steam.

My stock functioning blower keeps my windshield clear though.