Overheating on track only

[Ali M_csl]

Remove that fecking great big fan blocking the flow.

Yes but would fit electric puller if you still want to be able to use AC while stationary / slow traffic....

...or just do as Alex does and be prepared to not use AC unless moving.

Cool suspect my issue was maybe having the AC on then whilst on track.

Issue was probably having the big AC/AUX fan blocking flow but then double hard on the system also running AC.

I shall remove the AC fan and the viscous fan and install the electric fan like Ali has done.

Shall also remove front plate and pollen filter housing on track and not use AC, should have no issues then fingers crossed.

Should be sweet after that. Was using all the rev's at Nurburgring last week, not having to lift off/short shift :smokin:

[Graham]

Thanks Ali, very informative :-) I am going to order the mishimoto 16" fan and remove the aux fan and viscous fan. Did you clean up your radiator whilst you were there? Unsure whether you can jetwash them.
Have you any closer pics of the wiring you did?

So my understanding is correct with no aux or viscous fan but with 16" moshimoto fan you can use car as normal, AC on idle or on track?

[alexk]

Shimmy and all I noticed something else when I removed the AUX fan.
The AC fan has a 'plastic' coating that makes it look black.
At various points the 'plastic' material has seperated from the metal one.
In my opinion, this is blocking the airflow as the dimension of the holes is reduced.
This could explain why some cars overheat that didn't overheat in the past (provided that you have eliminated the water radiator, water pump, thermostat).

A test could be that you remove the AC radiator and try again

[billyboysm3]

As per my build thread we installed electric fan and electric switch on the M3 last week, removed front fan and aircon, was on track all day yesterday at 25• and had no overheating issues with oil or water, oil sat just above 100 and water was just under half, but was shifting at 6k revs.

This is installed on the 328 also and she never overheats.

[billyboysm3]

The electric switch, switches the fan:

Switch on temp - approx 90degC

Switch off temp - approx 80degC

[Gibbo]

As per my build thread we installed electric fan and electric switch on the M3 last week, removed front fan and aircon, was on track all day yesterday at 25• and had no overheating issues with oil or water, oil sat just above 100 and water was just under half, but was shifting at 6k revs.

This is installed on the 328 also and she never overheats.

Is your electric fan installed in same position as Ali M's?

[stevenEK9]

Thanks Ali, very informative :-) I am going to order the mishimoto 16" fan and remove the aux fan and viscous fan. Did you clean up your radiator whilst you were there? Unsure whether you can jetwash them.
Have you any closer pics of the wiring you did?

So my understanding is correct with no aux or viscous fan but with 16" moshimoto fan you can use car as normal, AC on idle or on track?

:smt107 just run an open hose through it to clear it out, the fins are quite fragile to even trying an air line on it

but you are correct, AC will still function fine with the above mentioned configuration

[shane@mbtech]

Said this many times before on here.

Yes but would fit electric puller if you still want to be able to use AC while stationary / slow traffic....

...or just do as Alex does and be prepared to not use AC unless moving.



Issue was probably having the big AC/AUX fan blocking flow but then double hard on the system also running AC.




Should be sweet after that. Was using all the rev's at Nurburgring last week, not having to lift off/short shift :smokin:

[Graham]

:smt107 just run an open hose through it to clear it out, the fins are quite fragile to even trying an air line on it

but you are correct, AC will still function fine with the above mentioned configuration

That's why I asked before doing it :hahaha:

Awesome. I am looking at Kenlowe fans aswell

[Trawler]

Have standard exhaust but thought you may be interested n the temps during a track day at Donnington.

Ambient temp as recorded on the on board computer 31.5 deg C
Water temp. Dead centre and needle did not move
Oil temp, just below 125 deg C

Air con was set at 17 and did not switch it off

[Graham]

I started this today...





Had trouble removing the viscous fan so might have to make a removal tool

[khooni]

per Simpson, even though AC was removed on my CSL, they left the AC fan because it would switch on above 90C and in their opinion would be more beneficial than taking it off although like in a non ac car.

I have also installed a brand new oil cooler because the oil one was shot and oil temps got to 125C on a spirited run although the water temps never increased beyond the middle. Will be out on Brands 10 nov to see how well it copes.

[shane@mbtech]

Non AC car only has viscous fan.

[derek]

Never had temp issues with csl on track, m3 oil and water temp high, fitted oil divertor value, motorsport thermostat and viscous fan car has no temp issues now. Cheap fix.

[shimmy]

http://m.mishimoto.co.uk/bmw-e46-m3-performance-aluminum-fan-shroud-kit-01-06.html

Looks interesting