I'm driving a non turbo diesel Toyota Townace Noah van every day now. No ECU in this.
I bought some aluminium flexible ducting and redirected the cold air intake to the exhaust manifold, I modified the manifold tin plate on top by welding on a tin tube to fix the flexi tubing on to. My warm up times got way quicker, running temp the same.
I blocked the grille by about 75%. Running temp the same, even quicker warm up times.
I removed the thermo clutch actuated cooling fan, its non electric and locks when warm air thru the radiator heats the thermo clutch thingy. Even engine cold there was lots of windage when the fan blades were supposedly mostly slipping. I reckon I got an extra hp by losing the cooling fan. Yes. No cooling fan at all!! (its winter now)
Even quicker warm up times and same running temp.
But fuel economy really got better when I tweaked the air/fuel ratio screw on the injector pump, nearly 3/4 turn out. Massive 20% improvement!! Averaging 5.8l/100km now in a 1440kg automatic van @60psi with no FAS but neutral glides where possible.
After adjusting fuel/air ratio I had to up the hot and cold idles and adjust auto trans kick down. Dead cold engine has nearly no power, and overall power is way less.
But hey, I'm an ecomodder. 40.5mpg US in a 3100lb diesel van
The earlier Townies used to overheat easily as engine and rad were tucked under the seats, well in from the front of the vehicle, with auto tranny cooling radiator immediately in front of the engine radiator. Toyota made up for this by overcooling the new model with the same 2c engine. Thats what auto engineers are paid for I guess. Roll eyes
I reckon I can go all summer with these mods, maybe open up the grill a bit if temps rise....or 5 minutes to put the cooling fan back on.
I aint hauling loads, sitting in long stopped traffic or travelling fast....Above photo not of my Townie