This has turned out to be a great mod. I went for a putt in town today and I let my temps get up to 180, when I kicked on the sucker fan you wouldn't believe the amount of heat that thing is pulling out from under the tank. I would say my vapor lock days are gone for good.
I did make one change when I got home. I put the sucker fan on it's own switch because I noticed when I get above 30 mph the ram air starts to work against the fan and I still wanted to keep the fan on the radiator running so I needed to run a separate switch. I can tell you that this is worth doing for more that one reason, it also pulls a lot of the heat off of you when your sitting in traffic, that right there makes it worth doing.
I did make one change when I got home. I put the sucker fan on it's own switch because I noticed when I get above 30 mph the ram air starts to work against the fan and I still wanted to keep the fan on the radiator running so I needed to run a separate switch. I can tell you that this is worth doing for more that one reason, it also pulls a lot of the heat off of you when your sitting in traffic, that right there makes it worth doing.