07-26-2016, 01:23 PM
Probably not much interest to anyone, but found on ddec 3, intake manifold temp does not affect engine fan operation. It may derate the engine but can not really tell.
Because I have a less than perfect exhaust blanket, and a higher output turbo and low restriction exhaust, my intake manifold temp was running too high. [140+] According to Richard and DD, should be only 30 degrees above ambient.
This was a result of the hyd fan not coming on until water temp was high enough to trigger it. By that time, cac temp was too high. Was going to run wire to dash from hyd fan valve solenoid, so I could open circuit and allow fan to run.
Instead, bought $4 thermo disc that opens at 130 and closes at 115 and put in line with solenoid valve. Mounted it on the discharge of the cac. Now fan will come on for a short period and cool down intake air.
Probably not the best engineering practice, but can anyone see a downside to this setup?
Thanks Jim
Because I have a less than perfect exhaust blanket, and a higher output turbo and low restriction exhaust, my intake manifold temp was running too high. [140+] According to Richard and DD, should be only 30 degrees above ambient.
This was a result of the hyd fan not coming on until water temp was high enough to trigger it. By that time, cac temp was too high. Was going to run wire to dash from hyd fan valve solenoid, so I could open circuit and allow fan to run.
Instead, bought $4 thermo disc that opens at 130 and closes at 115 and put in line with solenoid valve. Mounted it on the discharge of the cac. Now fan will come on for a short period and cool down intake air.
Probably not the best engineering practice, but can anyone see a downside to this setup?
Thanks Jim
2003 foretravel designer series. previous 2000 foretravel 34 ft, isc 350, 1995 45 ft Newell coach 385, Foretravel [2], 4106, 4905, wayne bus, wanderlodge fc, gmc motorhome.
toads: 2011 honda fit sport, Yamaha Zuma 125, Suzuki tu250.
daily drivers: boxster and cayenne