914-6 runs HOT - Part 2 Options

[767driver]

Some of you may remember my initial thread about 914-6 oil temps here...

http://www.914world.com/bbs2/index.php?sho...%20hot&st=0

I was hopeful that re-installing the ducts from the fan housing to the heat exchangers would solve my high oil temps. Well...it solved one of the causes of my high oil temps. Now that I have driven the car on 2 multi-day tours through California I can unfortunately report that the issue is not fully corrected.

With the benefit of hindsight I now know that as road speeds increase the airflow through the engine compartment is insufficient to keep the oil temp in check. Running through the gears on tighter 2 and 3rd gear roads are no problem. It's the more open 4th and 5th gear runs (high road speeds) that are causing the problem now.

Now it looks like we are dealing with 2 options. The first is to install a faster-turning 1.9 to 1 ratio fan setup. This will increase airflow through the engine compartment but will make more noise and take a few HP to run. The second option is to add an external oil cooler. The front-mounted cooler seems to be the tried-and-true solution but is expensive and invasive. Some folks have rigged up an external cooler with fan under the rear of the car.

I am soliciting thoughts, preferably from those with experience themselves, on these or any other options that may exist. I would appreciate any pictures of the various external oil cooler installations as well.

Many thanks,
Lee

[ConeDodger]

First of all, gauge and sender compatible?

Your 4th and 5th gear problem is fan speed. I have confirmed that with CHT. As soon as you go into 5th gear your CHT starts to rise. The rise in oil temp is just the response.

I have a front cooler and an incompatible sender. I've confirmed my temps with a pyrometer as much less than the gauge says...

Bitch is lying to me! (IMG:style_emoticons/default/av-943.gif)

[767driver]

First of all, gauge and sender compatible?

Your 4th and 5th gear problem is fan speed. I have confirmed that with CHT. As soon as you go into 5th gear your CHT starts to rise. The rise in oil temp is just the response.

I have a front cooler and an incompatible sender. I've confirmed my temps with a pyrometer as much less than the gauge says...

Bitch is lying to me! (IMG:style_emoticons/default/av-943.gif)

I can drive in 4th gear at 4000rpm which is 70mph in my car. Still gets hot. What's the difference between driving at 4000rpm in 3rd and 4000rpm in 4th? The higher road speed and less air coming through engine compartment due to the 914's aerodynamics.

[Justinp71]

First of all, gauge and sender compatible?

Your 4th and 5th gear problem is fan speed. I have confirmed that with CHT. As soon as you go into 5th gear your CHT starts to rise. The rise in oil temp is just the response.

I have a front cooler and an incompatible sender. I've confirmed my temps with a pyrometer as much less than the gauge says...

Bitch is lying to me! (IMG:style_emoticons/default/av-943.gif)

I can drive in 4th gear at 4000rpm which is 70mph in my car. Still gets hot. What's the difference between driving at 4000rpm in 3rd and 4000rpm in 4th? The higher road speed and less air coming through engine compartment due to the 914's aerodynamics.

What do you consider Hot? My car runs around 200f if its over 80f outside, used to run ~180f when I had a more stock 3.0. I have a front oil cooler.