Re: 18-20-25 Fuel Diverter Cylinders run warmer?

[johnyrude200]

I do know the water route is different, but I’ve noticed that wherever that extra fuel is being dumped, that cylinder is running hotter. Usually it runs about 10-15° above the ‘lean’ cylinder, and once the thermostat opens, it doesn’t mean anything, but I have been seeing those cylinders run up to 175° until the thermostat opens.

The cylinder head (where the thermostat sits) seems to take awhile to catch up to the temperature of the cylinders, and of course if one is running a little warmer than the other, than by the time the thermostat opens, it may be operating a little above the right range. The thermostats I use are set for 143°, but I’ll have cylinders running 160° and the thermostat is still only at 120°.

I am pointing the laser at the cylinder walls (top and bottom), although I thought I read a good place is where the ID plug is punched in. Any areas you use to use as a tell tale?