It starts cooling the engine sooner so it won't go as high.
My temps. before with a fluidyne and stock therm. were about 188 max on the street in ~85 degree weather. (197-211 race track, 5x 25 minute sessions, I got to 211 on the last session, ~80 degree weather. )
My temps now with the TRD therm added are 168 on the street.
I haven't been to the track yet to see the differences there though.
do you have the powerhouse dual fan kit in or still the factory unit in place.
if you have the powerhouse dual fans, how do have them connected? over the ignition (the run allways wenn the engine runs) or over the thermosensor below in the radiator opten at 96C and close at 85C (I believe something like that)?
I had the flexlite fans, but they melted down and spiked my radiator pressure/temp and BAM!!! no more factory radiator. I had them wired with ignition switched power, The thermostat that it came wiht sucked!!! I took the thermostat off in a week.
They seemed to flow slightly more air at static , but the stock fan kept the car cooler at the road course. I think Jeff Hood had the same findings on the road course also.
My anwser is that the flexlites are good for cars who drag race/ street race, but stick wiht the stock fan if you take your car to the road course.