CKlasse,

I have built lots of AMA Supersport and Superbike motors. My last motor was a 600cc Yamaha using stock parts that made 118 Hp on the Dyno to the rear wheel. Thats almost 200 Hp per liter.

All the things I do to a motorcycle engine apply to any engine. They all are air pumps which need to get air in and move air out.

And I have built about 30 engines. Cars are much easier as there is more potential output because they are no where as fine tuned as the current Japanese 600-1000cc engines are.

If you wanted to go to Carrillo rods and Forged pistons then you could raise the rpm's a bunch, say to 8000 rpm depending on the current stroke. Plus if the rod journals are large then you can offset grind them smaller to fit Honda sized rod bearings and reduce friction and pick up displacement.

If the bores are Nikasil plated alum. then the block can go to Millenium and they will bore it and replate it, provided there is enough room between cylinders. But even on the motorcycle stuff we can usually get 3mm extra piston diameter.

Webcam will grind me any size cam I want and provide valve springs.

If displacement went up to 2500cc then I could see that motor making a very reliable 225-250 Hp at the rear wheel.

Jeff



Jeff