car still too cold cant figure it out????

[slider4life]

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

[takai]

How have you hooked up the 20v water pipes. Ive seen something similar to this happen when the rear water outlet on the head was hooked up to the rad side of the thermostat, effectively bypassing the thermostat.

[Sam-Q]

yeah something is amiss in your cooling system design.

[sotiros86]

Have you tried removing the oil cooler?

I was looking at buying a 20V ST Sprinter about 2 years ago, and the guy was running a 13 row oil cooler, but it was fricken huge, and it was causing the oil not to heat up properly, and as such, the thermostat didnt have to open to help transfer the excessive heat. He ended up just making up a small aluminium cover plate for part of the oil cooler for when he was driving around town, and then just unscrewed the cover when he went to the track.

Maybe try and just block off some of the cooling fins of the oil cooler, and see if it effects it.

[slider4life]

i already have half of my oil cooler covered with an alloy plate i made up still no diffrence.

but thinking about what sam q said i do have a bypass line from top and bottom rad hose ive been told people run them maybe if i dissconect that so it dosent have a bypass and has to run through as per normal???? ill put a pic up and show you what i mean this arvo

[takai]

Bypass line from the top to bottom rad hose essentially bypasses the thermostat. Can be good for cars with overheating issues, bad in your case.

[slider4life]

this is a pic of my cooling system im thinking of deleting or blocking the green pipe????

[takai]

Where is the thermostat in that system?

[ke70dave]

yer that photo is quite confusing...

what does that green pipe do?

and yer same Q as takai where is the thermostat?

and how close is your system to this:

[slider4life]

sorry here are are few pics hope this explains it better