Well, I would normally agree with the 15hp driveline loss but since I have the actual dyno graph of a stock F23A1 showing a true 138hp at the wheels (equiped w/5speed manual) I'm using that as the basis for the F23A baseline. The F22B will difenately post less due to its smaller displacement and lower compression compared to the F23. But F22cars need not overcome the weight that F23 cars typically have. The ideal build up car for and F-series engine would be the F23A equiped Acuras CL's. Not only due they come stock with the 2.3liter engine but they benefit from the lower Gen5 platforms less gurth.

If you guys want I could post the matrix of stock H22 and F23 baseline graphs main RPM points. You guys could then construct you own graphs and see the simlairities between the two. I really think the F' has some nice potential for a great street performance engine. Is the F going to stomp a B20 hatch, not likely, but their relative availability makes it an attractive engine to tweak on the cheap IMO. Now if you're running 50lbs. of speakers in your trunk any type of engine tuning is really a moot point.