Pics of modified stock cooling fans, Optimized for higher RPM use and optimum power Options

[Jake Raby]

All of these units are balanced to Kevin Groots E Production 2.0L SCCA engine. We havewent a little above and beyond to do this so he will have a variety of cooling fans that can be used at various tracks due to the track conditions and configuration.

Each of these will be tested on his engine while it's proving it's self in my new lab in just a couple of weeks in preparation of the 2007 SCCA season, his first with MassIVe power.
During testing we'll be comparing the effectiveness of the cooling fan in both temperature ranges and power potential so kevin will have baselines that he can use to choose the best fan for the particular track event be it qualifying or the mac daddy at the Run Offs....

Each of these will be tested both with and without our newest cooling system addition for the 914 engine, the cooling fan velocity enhancement ring. This ring works with any stock fan on any Type 4 fan housing as a bolt on component. It protrudes into the fan inlet and helps to boost the speed of the air entering the fan as well as helping to direct that air into the fan more effectively. The unit pictured is an R&D unit made for me by good ole "spunone" who has become our go to guy for trick test components like this! Thanks man!

I'll be posting data logs from the testing over on my forums in the "Dyno room" section in a couple of weeks..

[Joe Owensby]

Just curious. What is the rational for removing portions of only a few of the blades? I know there are significant end effects on the air flow for any airfoil, with lots of losses attributed to the vortices at the end of the foil. This is one of the reasons that fans have shrouds, or modern airplane wings use winglets, turbines have housings. There could also be interferences in airflow from say the end of a short blade to the following long blade. I would have thought that a modification of just maybe reducing the length of all the blades by the same length and then making the shroud or inlet guide match all of them equally would be the way to go. I am no aerodynamicist, but this looks as if it could add a lot of turbulence in the fan area. There must be something I missed. I am not criticing, just curious about this interesting modification. Joe O.