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RE: [T3] Heat exchanger elimination (was: Used Books & Exhaust)

Unlike water-cooled engines, it doesn't matter if the heater is on or off in
terms of engine cooling since our heat comes from the 1 and 3 *exhaust
pipes* in the stock system (and some from the 2 and 4 exhaust pipes in a
pure stock system).  Water-cooled cars use the heat from the engine coolant
to warm the cabin, which is why they say to turn on your heater if your
water-cooled car is overheating so you can help cool it down.

Now, let's say the engine is really hot and we want to insure that is gets
the most cooling air it can.  The best thing to do is keep the heaters off.
Since no air is being used to heat the cabin, all of it will be used across
the engine.

Okay, a tiny bit of air still escapes from the forward top part of the heat
exchanger so to get ALL of the air to the engine you would want to do #3
(below).  But this is such a small amount as to be negligible.

This all goes with out saying that we are discussing a stock engine or a
custom one with low cylinder compression (to avoid excess heat generation).
   Toby Erkson
   air_cooled_nut@pobox.com  <-- Please use this address for email
   '72 VW Squareback 1.6L bored and stroked to 2.0L, Berg five-speed
   '95 VW Jetta III GL 2.0L, P-Chipped, Jamex sport suspension
   Portland, Oregon, http://www.icbm.org/

>-----Original Message-----
>I've always wondered what's best (in terms of engine cooling), 
>1. Stock system, heaters on.
>2. Stock system, heaters off.
>3. No heat exchangers, fancase outlets blocked.
>Wondered if the extra cooling air across the engine in 3 would 
>outweigh the
>lack of cooling of the exhaust system? Probably not.

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