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The Boig / Gibb was the proper GT3 car, mostly tube frame IIRC.
I'm not worried about mounting the fenders to the OGK, we can definitely work with any type of mounting arrangement they come with or not..
It's been a L-o-n-g time since I dug into that memory, but I want to say the Boig / Gibb car was the first NB GT3 car, but was not the first time a GT3 Miata was built.
I believe that one was the Team Tambourine NA which digging deep into my Gray cell area I recall the car had the wheel base extended to 91" and a 13B swap.
That car actually qualified and ran the 24hrs of Daytona back in 2000 or 2001, I remember it had twin dry break filler in the back and a few other cool bits...
AFAIK there were only a handful, maybe 3-4 purpose built GT3 cars ever built. The others were full tub EP cars with a few extra bits, not true GT3 cars. One of the reasons the knowledge base for super high output N/A BP's is so thin. The few guys that know aren't on forums and wouldn't share anyway. Yah, Boig's car looks to be 85% tube frame by the pics. Charles *** and a few others built GT3 cars that were mostly full tubs.
This is the pinterest image of the cleco stage of Boigs build that started my search:
Most of us that have been around race Miatas for a while knew about the car but it has been out of the public eye for a long time. I have pictures on my hard drive of that car that are 7 years old. What I didn't know was who made the fenders thus the connection in this thread for ogk.
The original impetus for this car was lost over the last two years. Tub sat in our shop with no real purpose or direction. Our focus shifted on getting the S1 class in Supermiata up and running. Then Super Lap Battle 2017 happened. Some of you saw the in car video.
We won Unlimited RWD and dropped the existing Miata record by about 7s. We did this in just a tweaked S1 Supermiata. A long way from a purpose build time attack special like Ryan Passey's Street class monster. We were surprised at how quick it was given the relatively simple mods. That inspired me to dig out the OGK tub and plan a full on Unlimited time attack car. The new plans go far, far beyond what was originally planned for it.
Tub
We'll remove as much of the tub as we are allowed to by GTA Unlimited rules. Primary goal is to save weight but it will also allow us to repackage things, makes things stiffer and gives us more option for aero under the car. If you ask "what will you remove?" The answer is literally everything we are allowed to. What remains will likely be the firewall and cockpit portion of the tub with minimal extensions to the subframe pick up points. Everything else will be tubed and lightweight subframes to mount body work off of. The radiator is already in the rear, where it will stay.
Aero
All the body work and aero will be custom fabricated, vacuum bagged dry carbon. We have two shops working on various pieces. Current plan, subject to change, is to have air flow through the nose and exit out the hood. Engine will be relocated much further down and back with custom mounts. This will allow significant airflow through the hood. We're not talking hood vents, we're talking an specifically shaped 3D port that you could pass a carry on bag through. Big diffusers front and rear, flat bottom, wide splitter with integrated wing shapes. Triple element rear wing.
Engine
We're building a dry sump, billet crank, big cammed 1.9L with every trick we know. It'll be fed by a TSE EFR 6758 running on E85. Goal is 500whp and 8200rpm or so. DBW throttle for semi-auto up/downshifts.
Suspension
Drop spindles, Xida ACE with GPS based track specific tune. Tubular sub frames, tubular control arms. Possibly carbon/carbon bakes. 15x11 and 15x12 with 275/35/15 & 295/35/15 Hoosier A7's.
Calipers will be the radial mount Superlite and Powerlite rear. 12x1" front and 10.9 x .45" rear.
Currently, we have most of this in the building or being built. There are a many other aero tricks we plan to implement but will not identify them until the car is running early summer 2018. As always with ambitious projects like this, it will evolve as we flesh it out. We're aiming for 1800lbs with driver, 500whp which will give us about 3.6 lbs/hp. Well down from the WTAC cars but at the pointy end of things for the North American time attack scene.
With cutting the tub that much do you need drop spindles? You could just raise the subframe mounts, and run pushrod shocks to get around the factory shocktower requirements. Also when cutting that much and doing the speedway rear end, do you really need to stick with 15s? You could step up to 16s in order to run the R75As, which I'm sure are faster for a lap or two over A7s.
With cutting the tub that much do you need drop spindles? You could just raise the subframe mounts, and run pushrod shocks to get around the factory shocktower requirements. Also when cutting that much and doing the speedway rear end, do you really need to stick with 15s? You could step up to 16s in order to run the R75As, which I'm sure are faster for a lap or two over A7s.
We thought about building for the available ~25" 295/30/18 A050 WTAC tire "just in case", but decided THAT scale of project was too much to take on. The proposed version of OGK2018 is much more reasonable. lulz.
We'll be sticking with geometries and tire diameters we are familiar with. 275/295 A7 will be plenty.
It's also important to note we ran off-the-shelf Xida Race single adjustables at SLB. We want to prove the value of our existing product line, so production Xidas and 6ULs will be used.
If we were going to accommodate a larger tire at all, it would be the 295/30/18 so we could theoretically run the Yokohama A050 as used in WTAC. Otherwise, as Dan stated, we'll stick to what we sell. The 295/35/15 should be enough. I think.
Current state of the tub. By the time it's done, probably 60% of what you see here will be replaced.
Why the tire size/wheel size stagger? With all the cool stuff going into this, I can't see you doing that ridiculously expensive sequential for the ND. I can't wait to see this thing destroy all!
Tub
If you ask "what will you remove?" The answer is literally everything we are allowed to.
Aero
custom fabricated, vacuum bagged dry carbon. We're not talking hood vents, we're talking an specifically shaped 3D port that you could pass a carry on bag through. Big diffusers front and rear, flat bottom, wide splitter with integrated wing shapes. Triple element rear wing.
Engine
We're building a dry sump, billet crank, big cammed 1.9L with every trick we know. It'll be fed by a TSE EFR 6758 running on E85. Goal is 500whp and 8200rpm or so. DBW throttle for semi-auto up/downshifts.
Suspension
Drop spindles, Xida ACE with GPS based track specific tune. Tubular sub frames, tubular control arms. Possibly carbon/carbon bakes. 15x11 and 15x12 with 275/35/15 & 295/35/15 Hoosier A7's.
Calipers will be the radial mount Superlite and Powerlite rear. 12x1" front and 10.9 x .45" rear.
04-19-2016, 04:53 PM
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