225 p/m temp question

[KIRCHNER]

why does my temp drop as i speed up? have 2 pc plate/stats. when i slow down temp goes up. maybe 150, like clockwork, ide rather be 150 than too cold.motor been running great. any ideas why? thanks;Art

[JCSmile]

What is water pressure doing during this time? Are you measuring temp in the head? Likely it is the poppet opening. Poppet opens around 12psi which is around 3k on my pmax. Prior to the poppet opening the water is held in the head which keeps it warm. I've noticed on my 200 this spring that I can only run 2-3 miles in cold water (<60f) before the temps get too cold for my liking and I have to back off or come down to idle to close the poppet and heat things back up.

[JCSmile]

Usually you can clearly see the water pressure surge and then oscillate or drop when the poppet fully opens

[skialot2]

Mine does the same thing. About 160 while going slow. Drops to around 140 at speed.

[KIRCHNER]

pressure around 20 going slow, drops to 12 at speed. all good, my 2.4 220 burns 1/2 the fuel of the 225,, the 220 has 145 psi, the225 has 115,i run reg pump gas,220 gets 93

[Greg G]

You are running a Promax 225 stock and your water pressure at 1500 RPM is 20lbs with an recent water pump and impeller?

[skialot2]

Water pressure at idol should be 1-3 psi. Poppet opens between 4 and 9.(prob closer to 9) Minimum pressure at wide open is 12psi.

[KIRCHNER]

You are running a Promax 225 stock and your water pressure at 1500 RPM is 20lbs with an recent water pump and impeller?

i could be wrong on that 20lbs.

[Greg G]

Ahh, got it as that would point you in a much different problem solving direction. As posted above, couple lbs is what you want to see.

I would confirm that you have 143 tstats in it. I have seen 120s in them