ok guys i asked this question a little while ago the car wouldnt get over 50 deg while driving, but every time you hit it hard it would drop to 40 deg as quick as the revs would go up.this is a problem because cold start cuts out at 70 deg. so at the moment its fouling plugs and im getting a maximum of 280klm to a full tank.

now the things ive done to try fix it, i have fitted an alloy pully kit with an over driven water pump i also fitted a welch plug in my top rad hose and drilled a 10mm hole in it i have also covered up half my oil cooler. all of this has helped on the track now it sees a max of 90 deg which is great when it sits at idle in the drive way the hottest it gets is 75 80 deg which is also ok, but driving around town it sees about 60 to 65 deg at the most how do i get this thing hotter without cooking it at idle???

mods to car
blacktop 20v
koya radiator
13 row oil cooler
4.7 diff gears (so she revs alot ie at 100klm an hour its doin 4000rpm)

my goal is to have it sitting around 80 deg around town and on the high way.

can i put a hotter thermostat in it to try hold the temps and has any one had an issue with the thermostat getting sucked open under full throttle and high revs????

also i have changed the thermostat twice now i have a genuine toyota one in it at the moment.

hope thats enough info on it and i can be helped regards shaun