cooling issues..., fine when driving, spikes when stopped. Options

[malaga_red75]

subaru JDM EJ25 DOHC

So, got my conversion finally road worthy and have noticed that while I am driving around, the car stays at around 200 F. when i stop, or let it idle in my garage... the temp slowly climbs and doesnt stop (i shut it off around 230 F). I am assuming this is an issue with my fans.

I am running a front mounted radiator, using 2 push-style fans. A few things that i think may be wrong...

-There is no shroud around the fans... just the shroud that seals the radiator to the front (since they are push fans, they are mounted on the front side of the radiator, in between the radiator and the nose of the car)

- there is about a 1 1/2" gap between the fans and the radiator (this was just the way that ended up working for mounting the fans)

anyways, i am pretty sure that the cooling system is working (no kinked lines, thermostat working, fans do turn on) as indicated by driving and the temp staying cool, there is just something not working when i stop moving. let me know what you guys think.

-Peter

[Mike Bellis]

Fluid dynamics is different. Pushing or pulling fluid is dependent on priming the pump head. Most pump do not pull very good vacuum. If you place the pump closer to the source liquid, the pump will prime easier. No matter where you install the pump, it is pushing. If it's a fuel pump, it pushes fuel out the outlet. The inlet is the vacuum side. The fuel molecule has more mass and specific gravity than air. comparing a fan and a liquid pump is not a good comparison.

Liquid pumps will always work better closer to the source and pushing.

Fans will work better closer to the source and pulling.

If the radiator were the fuel tank, both would effectivly be installed in the same place, sending their energy the same direction.