- Sep 23, 2003
- palmdale, ca
We are finally getting the Cobra back on the track been screwing with the kit car but finally pulled it off the rack. I never got the top of the radiator completely boxed. In the last couple of years it has become quite apparent the hood latch is a major headache on the track so I decided to pull it and replace with pins. I closed off the top of the radiator with some .050 aluminum sheet. We formed an L shape and bolted it on using the existing latch hardware. The L shape is riveted to the block off plate. The block off plate seals above the radiator fins. No more leaking out the top.
View attachment 71918
I was reading some old posts about the cars getting light with fully boxed systems. I believe Carlos left one of the panels out for high speed runs to vent pressure. I was wondering if any one had used block off plates for the inlets. Using Bernoulli we could calculate the 2 areas (radiator vs inlet) and then restrict the inlet area (drill holes in the blocking panels) to control the pressure at the face of the radiator.
I remove the bottom panel for high speed runs. There is not enough air flow thru the radiator over 140mph. Not sure what the optimum speed for a boxed in system.