Our Road Race Corvette Builds

Bosco

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Back in 2009, my racing partner (Squeak Kennedy) and I commissioned Woody at Bemco Fab to build us a tube frame C6 Corvette to the then Grand Am Rolex GT rules. It was to be used as a club racer but legal for GA should we find some funding.

Woody constructed us a square tube frame type similar to SCCA GT-1/Trans Am chassis. The motor was a forged, stock dimension LS6 per the Rolex GT rules of the time. The motor was built by Schwanke Racing Engines and dyno'd about 470 HP at the flywheel. It took until 2011 to complete the car as Woody built it in his spare time. By the time we completed it, the rules had changed and the cost of competing had gone up significantly. It would be a club racer !

We raced it in the SE Div of SCCA, at Sebring, Daytona, PBIR, Homestead and Roebling Road. As the LS6 was not really legal for GT-1 (despite being about 350 HP down in power), we raced it in the SPO class. The car handles and stops well, can hit about 180 mph at Daytona with sub 2:00 laps. My best lap at Sebring was about 2:19, but that was starting from last (not qualifying) and coming through traffic. I think the car is capable of about 2:15 there. Performance of the car is on par with the SCCA GTA cars.

The car is getting repowered with a near 600 HP carbureted LS3, and re-bodied with the wide body ALMS type body.

specs:

* Tube frame by Bemco Fab
* modified ALMS GT2 type body
* 600 HP LS3 with Edelbrock Vic Jr manifold and 750 Holley 4150, 3 stage dry sump
* Daytona Sensors ignition
* Quartermaster 3 disc 7.25 clutch
* G Force T101 A tranny with Long shifter
* 9 inch Ford rear end with Nascar chunk (3.08 for Daytona, 3.40 for most everywhere else)
* Nascar Brembo Calipers and 13" rotors
* 18x12 CCW wheels
* 2500 # minus driver
* Kirkey seat
* Custom 22 gal ATL fuel cell


Pic: Sebring 2014


 
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Nice! How did you decide what wing to run. Do you change the AOA of the wing for different tracks? With the black paint it's hard to see whats going on in the front for aero. Splitter and under tray?
 
The wing is the one that was mandated by Grand Am. It was made by Crawford Composites. We typically ran the wing about 2-3 degrees down in the front for Daytona and around 7 degrees down at Sebring and most others. The splitter is 1/4 inch aluminum clad PVC mounted to the bottom of the nose with some support attached to the tube frame at the rear. It was about 24" deep. Cost about 80 bucks for a 4x8 sheet.
 
Your splitter is the honeycomb plastic center with aluminum sheets top & bottom bonded to it? If so where did you get it? I tried the local plastic wholesaler I deal with and they didn't carry it. I thought maybe try sign suppliers? I've got a couple different length plywood ones I'm going to test. Once I decide on certain length splitters I'll make new ones out of better materials. Car will have full under tray with tunnels, diffuser etc. Since I don't race in any class with rules I can build pretty much whatever I want since I don't have to do the flat bottom thing.

I'm probably going to need a rear wing eventually. If I do, I'll try to find a good one used. Shoulda picked up one of the Crawford NASCAR COT wings when they were all getting dumped on Ebay. I have a guy willing to cut me some swan neck supports on a router table so I may try making my own although I've got a LOT of other projects. I'll get the car back out on track with the new aero and test at PBIR and Sebring before deciding on a wing.
 
The splitter is made of the solid PVC with aluminum on both sides. It is often used for signs. I got it from a material supplier in Daytona.

At one time I had about a dozen of the COT wings, but they went pretty fast.
 
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