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Old 12-14-2009, 01:40 AM   #21 (permalink)
IsaacCarlson
eco....something or other
 
Join Date: Jul 2009
Location: Colfax, WI
Posts: 724

wood hauler - '91 Ford F-250
Team Pontiac
90 day: 26.69 mpg (US)

Rav - '06 Toyota Rav4 Base
90 day: 26.52 mpg (US)
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I have been thinking about something like that also.

Quote:
Originally Posted by moorecomp View Post
I recently thought about doing a very similar mod. I was thinking of taking the return line from the existing heater core, and cutting it. Then run one side of the return line to the intake of the air box heater core and the outlet to the other side of the return line. Basically put the new one in series with the return line from the existing heater core. To control the temp, I would use a flapper valve in the airbox, controlled by a push/pull cable. No need for a flow valve.
I was thinking of running it parallel to the existing heater core to avoid reduced flow. I like to have plenty of heat when I want it. It would be good to have a way to disable this mod on hot days for cars that don't do well with HOT air. I think I have a tranny cooler that would fit in the air box.....

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1991 F-250:
4.9L, Mazda 5 speed, 4.10 10.25" rear
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