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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [xj-s] More Needless Complexity
> From: John Napoli <jgn@li.net>
>
> Are we breathing our own exhaust on this one? Will adding flow really
> cool the engine more? This sounds like cooling it down by removing the
> thermostats, and we know that doesn't work, because the increase in flow
> does not let the water cool down enough...
No it doesn't. That explanation is hogwash, more coolant flow will
always cool better. The reason removing the thermostats doesn't help
is because you simply let more flow through the BYPASS.
> Thermostats do a good and cheap job of controlling the engine temperature
> -- at least, on every other car in the world, which for some reason don't
> eat thermostats every couple of years.
Only British thermostats. The Stant items sold in the US seem
durable enough.
> What we are trying to accomplish here is a controlled reduction in the
> operating temp of the engine, when needed in extreme conditions or in
> anticipation of a hot shutdown. Will ANY intervention in flow cool things
> enough/in time? Probably not.
There has to to be some lack in capacity somewhere for the system to
fail to maintain temp. At high speed, the limit may be pipe sizes,
radiator surface area, etc. At idle, the problem is usually a lack
of flow -- either airflow or water flow or both. Since airflow is
easily addressed with electric fans (and a cleaned radiator), just
about the only remaining possibility is lack of coolant flow. I
personally would LOVE to get the idle flow up, I just don't think
overrevving the pump at redline is a good option.
-- Kirbert | If anything is to be accomplished,
| some rules must be broken.
| - Palm's Postulate
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