If you can find an allowance in the ITCS that specifically allows additional "heater water control valves" (or whatever you choose to call it), fine. But I'm betting you won't.
If you can find an allowance in the ITCS that specifically allows additional "heater water control valves" (or whatever you choose to call it), fine. But I'm betting you won't.
I'd vote for "probably not". But the more important question is, "why?" After all, with all the trick radiators available (thanks to Spec Miata) I'm not hearing of any massive cooling problems in Miatas...why add the complexity?
****I'm not hearing of any massive cooling problems in Miatas...why add the complexity?****
Because the #4 cylinder runs HOT. I would exlpain in detail except that you would .............................
Have Fun ; )
David Dewhurst
CenDiv Milwaukee Region
Spec Miata #14
I have the BIG Koyo and my engine almost runs too cool... even in the summer heat. What is the temp diff for #4?
Brad
1995 Mazda Miata (aka Black Betty)
#13
9.1.3.D.3.g:
The Miata cooling problem is basically this: when Mazda took the 323 transverse B6 (and its 1.8L version the BP) engine and shoehorned it into a longitudinal configuration, they changed a couple things to mount the engine as far back in the engine bay as possible: they replaced the distributor with coil packs, and they moved the thermostat housing to the other end (now front) of the engine.Engine coolant fluid, coolant/heater hoses and clamps may be substituted. Heater hoses may be plugged. Heater water control valve(s) may be added or substituted. Heater core and hoses shall not be removed.
The problem is water now leaves the engine through the thermostat housing at the front of the engine (to the radiator) and re-enters at the water pump on the front of the engine as well, so there is very little flow of water towards the back of the engine (cylinder 4). Bigger radiators etc. don't address this problem.
The coolant re-route kit restores the original water flow direction through the engine as it was intended.
Last edited by vtluu; 07-29-2009 at 10:21 AM.
Viet-Tam Luu (a.k.a. "Tam")
Director, SCCA San Francisco Region
2011 SFR-SCCA ITS Champion
#12 ITS (1999 Mazda MX-5 Miata)
#12 STU (2003 Mitsubishi Evo 8)
Another possible cure, since coolant to the heater core still runs from the back of the engine, would be to plug the existing heater core hard lines at the firewall, and run the heater coolant hoses to and from an auxiliary radiator. Would 9.1.3.D.3.a allow an auxiliary radiator to be added (as long as it's mounted parallel to the existing radiator)? Or maybe I could use the A/C condenser as an auxiliary radiator?
Or I could just turn the cabin heater on full-blast, but on the days where cooling becomes an issue, that's going to be fairly... unpleasant.
Last edited by vtluu; 07-29-2009 at 09:58 AM.
Viet-Tam Luu (a.k.a. "Tam")
Director, SCCA San Francisco Region
2011 SFR-SCCA ITS Champion
#12 ITS (1999 Mazda MX-5 Miata)
#12 STU (2003 Mitsubishi Evo 8)
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