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), it would give me the following options in order of effectiveness: =20 - use neither exchanger - use the one in the inlet tank only - use the one in the outlet tank only - use both plumbed in series (technically two options here, but I'd = figure to plumb to inlet, then outlet tank) - use both plumbed in parallel =20 Do you think this could work, or am I one wacky idea away from being = voted out of the group :-) =20 =20 Rusty Turbo 13B powered RV-3 (experimental aircraft)...Be Afraid :-) 1993 RX-7 R1... Not stock, carry bail money :-) =20 =20 PS- I played with the Henrob torch some more yesterday, and managed to = turn some cast aluminum into slag. Sure it was fun, but not the original = goal. Proper rods, flux, and instructional videos are now on order :-) =20 ------=_NextPart_000_0001_01C2EE26.215483B0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

OK guys, now = that I've got=20 the silly cooling stuff out of my system for now, I'm looking at a = custom=20 radiator. It's a little too soon to be able to finalize the = sizing, but it=20 looks like I'll end up having an 18 X 18.5 X 2.5 core, with tanks = fore and=20 aft. This will be an all aluminum, two row, 1" tube=20 core.

My current = question, is=20 about oil/water heat exchangers. It seems that I've read where = someone=20 tried this, and gave up on it, but I can't think of who that was, or how = hard=20 they tried to make it work. In other words, did they just = try an=20 existing auto trans cooler, or did they have something special=20 built. Does anyone know any specifics?

I can have an = engine oil=20 heat exchanger installed in the radiator pretty easily, but of course = it's=20 impossible to say if it would do the job. The Howe racing folks = say they=20 feel the exchanger is better than what you would find in a stock = radiator, and=20 that racing folks use them without any problems. Since = rotary=20 engines put more of a demand on an oil cooler, I'm thinking of having two of their exchangers added to my=20 radiator. Unfortunately, both won't fit in one tank, so I'd have = to put=20 one in the inlet tank, and one in the outlet tank. Strange as this = sounds=20 (Hey, I heard that <G>), it would give me the following options in = order=20 of effectiveness:

- use neither=20 exchanger

- use the one = in the inlet=20 tank only

- use the one = in the outlet=20 tank only

- use both = plumbed in=20 series (technically two options here, but I'd figure to plumb to inlet, = then=20 outlet tank)

- use both = plumbed in=20 parallel

Do you think = this could=20 work, or am I one wacky idea away from being voted out of the group = :-)

Rusty

Turbo 13B powered RV-3 (experimental = aircraft)...Be Afraid=20 :-)

1993 RX-7 R1... Not stock, carry bail money=20 :-)

PS- I played = with the=20 Henrob torch some more yesterday, and managed to turn some cast aluminum = into=20 slag. Sure it was fun, but not the original goal. Proper = rods, flux,=20 and instructional videos are now on order :-)

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