http://datsun1200.com/modules/newbb/vie ... post407973
This is where you'll find some info on Simons engine progress. True to form he has just posted a new figure of 161kwatw!! That is alot of power. And he has room to spare. Another thing to point out is that it is literally a bog standard A12 from a 120Y with an oval port head. His own cam choice but it is a very impressive setup.
I did my first L series conversion in a 120Y nearly 20 years ago and the change in handling characteristics was attrocious. It wasnt my car so I didn't really care, I left it up to old mate but in 2005 I built another L series 120Y. Although the power gains, mainly torque were more than impressive, it took as much work to get the suspension right just to get it to turn into a corner properly just because of the massive weight difference. The center of gravity felt like it was at the firewall. More camber and caster helped, stiffer spring rates etc but it was a prick to turn into corners. If I could have gotten the same power from a smaller engine the corner exit speed would have been heaps better. Sure it was a fun car but you had to put alot more effort into driving the thing.
If it is a track car you want think very carefully about the style or class you want to run in. If you are unsure, stick to Improved Production guidelines. At least then, when the car is finished you have alot more options about where you can run and the resale will be better. Building an off beat race car can limit the categories that you can race, and in some cased limit you to sports sedan. Which is very competitive.
The CG13DET will put you at 2.2L cubic capacity.With 180kwatw in a lightweight car that would make for a competitive car.