Goodbye Kansas

[DanEC]

Originally Posted by Bobcat

I`m seriously considering trying to adapt a Hurricane Motorsports front spoiler to mine , Bob

This may have nothing to do with anything, but having a late model Mustang GT saw a thread on the AllFordMustangs forum the other day from someone who's Roush's front spoiler was ripped off the front of his car, along with a good portion of the lower front bumper, under car shrouding and wheel well plastic at 155 mph. Some serious forces to contend with for add on aero components at those speeds.

Where some fool got his Mustang up to 155 mph on the highway I have no idea - but he's from Texas so if you live down there beware.

[Bobcat]

ERA2076 ... a few random thoughts . Way back in the day , I used to be pitted in the area where the A/P Cobras and Vettes were at some tracks . I remember seeing several 427`s with the hood opened about 1 " in the rear and was told that was to let the underhood air out . Since that area is a high pressure area if you have the windshield on , it probably was useless .... but if you ran a racing windscreen , it might have helped . Have you looked at that or found anyone who has done any aero testing on that ?
Also , Corner-carvers had a really good discussion a few months ago on splitters and it also went into belly pans , wings , diffusers etc .

Bob

BTW .... love the work you`re doing , looks fantastic !

[ERA2076]

Chas - thank you for the kind words. I have always thought of Cobras as racing cars. I am just following the work of those that came before and it is astonishing CS took the time to document so much. As soon as the Cobras were worthless, aero really took off and there are plenty of guy's who have implemented it on their Cobras.

Dan - Right on the money - attachment is very critical. We are having a new rear deck lid fitted with a 10" spoiler for my SVT. There is a full front splitter sitting on the floor I hope to have installed before the first track day in March. We are attaching the splitter to the chassis and front steel bumber support. We do not plan to have any physical connection between the cover and the splitter except racer tape to seal the two together. It is generally recommended that one should be able to stand on the splitter with no ill affect.

Bobcat - I have heard of this lifting the hood, but I am working on controlling all air flow by either blocking or moving it out (and or away), as soon as I am thru with it. I plan to duct the backside of the radiator and move the air down and underneath the floor pan. With our flat chassis and ride height as it is, there is even room for some tunneling if one were interested (I am). Best of all it is all hidden so we don't have to give up the beauty of the car. A splitter is ideal, but have not seen one yet that is pleasing to me. The spoilers were literally months away when the Cobras were abandoned and look correct on the car to me. Once we get the car running we will use the GoPro and yarn to see how any of it works. If I were going to lift the hood, I would figure how to louver it.

In Simon McBeaths "Competition Car Aerodynamic"s 2nd edition - there are quite a few graphics using Computational Fluid Dynamics to model air flow around a vehicle. There is a picture of a Cup car with a fully sheeted bottom - a gift for an ERA runner.

chr

[ERA2076]

Surly the ERA boys are licking their chops (replacement uprights?)





3ea 5/16 fine thread - 3/4 thread depth in upright






Caliper 120-7374 w/ Thermloc pistons



pretty good risk - we still have to fit to the car and try to get an offset that puts the tire where we want it while maintaining caliper clearance. It is fitting on the bench, but we are increasing the width of the wheels so we are not exactly sure how it all fits.

We are trying to fit these.