Car overheats only when on the highway on long trips but never moves when driving in town. Car has no thermostat so it shouldn't be that. It also has a upgraded radaitor from the stock sohc vtec to the dua core dohc vtec.
Lee

 

you can go to the store and get some liquid call water wetter.. i really help you just drain your anit freez out and put nothing but water in there and put in the water wetter in and bam you got a cold car. also put your thermostat back in cause when you use this its take alot to warm the car up... there my 02 cents and its worked for me and i hope it works for you..

 

you need to put the thermostat back on
i dont think the water/coolant is cooling off enough its running straight through
try putting one on

 

YEs, you need the thermostat. Try that, the coolant system is getting fatigued too early in the cooling stage.