In the past I've used very thin sheet metal epoxied to the backside and then used filler on the front side and sanded it back.

Note this would be on race cars.

For a road car that I wanted to be perfect, I'd fit a new door skin or patch panel.

So I played with doing a long road A12A using 133mm A14 rods.

2004-2010 ZX10 Pistons came in 75.94mm with 17mm pin and had a comp height of 22.7mm. 99-01 Yamaha R1 pistons are a very similar spec

What I found is that most motorcycle pistons have a very low comp height (around 22-23mm) so I am surprised that ZX11 pistons would work.

Regardless I can't use them anyway as I have to stay under 1300cc

As mine is a race car I don't worry to much about ride quality.

What year ZX11 pistons?

I weighed both the all steel H145 axle and the H190 with aluminum diff housing and brake drums. The H190 was only 2 pounds heavier.

I appreciate.the kind words. We are having a ton of fun.

The two classes are C-Sedan and vintage GT-Lite.

C-sedan requires the A series under 1300CC

GT-Lite allows me to run any rule set from a major sanctioning body. In the case of the B6 head on the A14 block I'd be in the same class as if I simply installed an SR20DE. It would be far simpler and the car would be faster if I ran an SR20. Further while CAMS IPRA allows a turbo A12 the rules, for vintage GT-Lite rules say forced induction automatically put you into GTO. GTO is where the V8 cars are.

I could in theory attempt to petition the club to allow a turbo A12; based on previous conversations I doubt it would be successful.

If I want to win either class I need to put the time and money the class leaders do. That won't be happening because I find that level of effort sucks the fun out of it.

D,

Anything other than the A-series moves me into the faster class.

D,

In order to stay in the same class I have to run the A12. 1300cc is the class limit. The minis are rebuilding there engines every other race. In order to beat them I'd have to tune the engine at the same level. No thanks

There is another class I can run in that would allow me to run an SR20 non turbo but the cars in that class are 10-12 seconds a lap faster. The class is led by an Austin Healy 100 which is the same weight as my car but making 180whp. Also the leading cars in this class are building engines that are rebuilt at the end of a six race season. Again no Thanks.

Vintage racing is my relaxation I don't want to turn it into a job.

I've given great thought to the aero nose on my car; read I belabored it endlessly.

Realistically it's not going to make a difference on my car. Even if it raised the top speed 5 mph to 110 mph, given the time I would remain at that speed, the difference in lap time is going to be about 3/4 of a second.

I am 5-6 seconds a lap slower than the class leading Minis at every track we go to.

The long and the short of it is I need 30hp more. That isn't going to happen because that requires rebuilding the motor every 6-10hrs. The end goal on the car is 90whp; the motor will last several seasons at that level.

With all that said that nose does look cool.