Join Date: Nov 2009
Location: Lander, Wyoming
Sorry that I didn't see this yesterday.
The left hand or rearward hose on the waterpump housing is the lower radiator hose.
The T-Bob "T" is installed into this hose, so the warming coolant from the warming cylinder head is going to warm the waterpump cover considerably faster than it ever used to, because there is No Trickle of coolant passing thru the 'cooler' (radiator) from the bleed hole in the old oem 160f thermostat. The warmth is re-circulated, rather than dissipated.
Therefore the whole cylinder, cylinder head, piston, rings, coolant & even the engine oil warms up faster & higher (195-210f) just like the T-Bob was designed to do.
I just started my bike, from a 67f temp. 1 min - 75f / 2 min - 90f / 3 min - 122f Measured with IR on the elbow of the black rubber LH/Rearward hose.
The RH/Forward/CYL hose was cooler because the waterpump impeller / clutch cover / waterpump housing are all absorbing heat.
ps, I forgot to write down the temp of the metal WP housing when the rubber hose was 122f, but it was warmer than my finger tips appreciated.
Last edited by pdwestman; 12-17-2018 at 12:35 PM.
Reason: ps added