- Joined
- Nov 19, 2002
- Location
- Northern Washington
Definitely thank you for taking the time to do the dyno pulls! It'll be really cool to see the gains as you get the car back to running well in stock form, and beyond.
The 240 rally car sees a lot of high revs and sideways action, so air is not always going into the radiator, and the tropical clutch is almost always engaged by the end of a stage (who knows when it kicks on). So for us, the power loss from a fully locked up fan at 4k-7.5k rpm is actually of interest. The good news about that setup is that we have never seen temps over 200F on stage.
I just installed a shrouded e-fan from a 9 series and used the thermo switch in the radiator as well as a switch inside. Heading to one of the hottest rallies we do every year this weekend, will report back on how the system worked.
You sir are in need of more radiator capacity.
Aftermarket aluminum radiators can be purchased by core size, by application... Made up however you like. Another 3-5 pounds in a big aluminum radiator is well worth the effort when the engine stays cool regardless of savagery on the part of the driver.
I did this in the rallycar. Temp gauge never climbs.