rad and coolant

[Johnny]

Mario Tito wrote:
> 
> Ok, so INCREASED flow thru block is bad (danger of cavitation)

ONLY WEN YOU GET TO THAT POINT. I would think that you can increase it
some from what stock is and that would be a good thing.

> Incrased HP creates more heat than oem.
> Only choice: increase radiator efficiency.
> 
>  Normal flow thru block:
>    (this represents coolant passages thru the block)
> ----------+-----+----+
> pump>>>   [ > > [  > [
>           [v    [v   [v         Coolant passes equally thru all parts of
> block (utopia).
> to rad<<< [ < < [  < [
> ----------+-----+----+
> 
> Increased flow (removed therm. or bigger pump{?})
> 
> ----------+-----+----+
> pump>>>>> [ >>> [ << [
>          V[v    [v   [^         Coolant not passing equally, and pulling
> some the wrong way.
> to rad<<<<[ <<< [ >> [
> ----------+-----+----+
> 
> Ok, maybe the cavitations make only 'little swirlies', but the idea is
> the same- heated coolant gets caught in its own circular pattern,
> creating hot spots.
> Excusing the ascii art, have I everyones' agreement? This does not
> explain the plane 160 deg vs 195 deg therm difference (does it?), tho....

I liked the art work.

The 195 thermostat does increase the rad efficiency. The engine is going
to be making the same waste heat for a given power output regardless of
the thermostat. With the higher thermostat, you are going to be able to
dump more heat at the radiator. I have also found that the engine runs
better and makes more poop with the higher thermostat. Probably cleaner
too.

-j-