One interesting point is chassis development and tuning that can be done to make one car handle, or out handle, another - even with an inferior starting point.
The new Lotus Exige was recently at Road Atlanta with excellent SCCA drivers we compete against at the helm f the car wearing stickly R Hoosiers. Lap times were decent, around 1:45 or so after many adjustments were made, this with a 190hp car at around 2000 lbs. Mid-engine car, setup to hustle a track on a track day. Very good times for a mass produced sports car.
But when compared to our clapped out race cars it isn't too good.
Group 240z, BMW 325s, last gen 240sxs, and 2nd Gen RX7s all turn around 1:41s there with the same drivers, same tires, similar hp, but a little more weight (325 a lot more weight). And definitely inferior chassis design. Difference? Lots of time into chassis setup and getting the most out of what little is there since stock pieces had to be used, besides springs/shocks/bushings additional links, panhard bars where needed, etc.
Sure, the latter are caged cars and that is a huge improvement, but there are many folks I speak to regarding setup and changes and they would simply say "No way that 4 door pig will out perform the Exige on the road course". Well, it did and it is documented. Where there is a will many times there is a way.
Now, I'd like to have a "disposable" Exige to cage and use as a race car. Anyone have one they'd like to donate?
On the chassis front Lynn talked to Mosler here in the US and visited their facility where they make their CF tubs for their prototype cars. His aim was to talk with them about a CF chassis design and they entertained his concept and thoughts. I don't remember the complete details, he might have written it up on the forum, but as already mentioned it was expensive. But I don't remember it being insanely so (relatively speaking, it was insane for my needs and means). Maybe Lynn will chime in with details. I'm sure there are those around who would be willing to go there.