Originally posted by SVTtheory2000:
would it be so much that polypropelyne glycol is ultra cool? i found that it is just a matter of that propelyne glycol has the ability to super heat, and the poly version does not superheat, therefore it can come in contact with the headers......
I believe you're talking about "Heads", not "Headers". Headers are smooth flowing tubular exhaust manifolds. Heads are what sits on top of the cylinders and also contain the valvetrain on most engines. Cooling the heads first makes sense for cars designed with the right computer in mind, but for our cars it may throw a pretty big wrench into the spokes. Todays OBD-II ECUs are very sensative to operating temps... many people of the Mustang GT crowd can attest to this... The 5.0 used to love a colder thermostat... try it on a 4.6 OBD-II car, and you'll run rich and loose performance without a serious reprogram on the computer. I'd venture to guess that the same could be said for the Contour or any other Ford car made today. If it's not overheating or taking to long to heat up, leave it be.
