Eric Johnson,John Langer and myself have each built NA engines that approached 2HP/CU In.My engine,which was my own design was 446 " and dyno'd 3 years ago at 841 hp [corrected] Eric and John's engines were larger,in the 468-470 cu in range and made more power.
All three of our engines utilized Wentzler Series 1 or 2 cylinder heads. All 3 of the cars dipped into the 8's at roughly 6.9 lbs /cu. in and approx 150 mph,or so in over 3000# cars.
All three used IA blocks and billet cranks,Titanium valves and stiff cams.
I figure I was making at least 1.95 hp/cu in last year. 2 hp/cu/cu in may have been feasible but with huge costs. With a smaller engine it would have been accomplished.The cylinder heads,of coures are the limiting factor and the Wentzler Series 1 and 2 heads are limited in intake flow to about 360 cfm, without reducing the exhaust flow,which is counterproductive.
|