Can anyone tell me how much compression/horsepower I would get just putting flat-top pistons in an F-54,P-90 combo? It has dished pistons right now.:classic:

If you run Windows, see this thread:

http://www.240z.org/forums/showthread.php?s=&threadid=1292

The calculator will help you with what you need to know.

Thanks a lot Mudge! That thing was pretty neat. The ratio turned out to be around 8.5:1 though. I was hoping for higher than that. I also have an older 280 engine with an N-42 head that according to the calculator says has a 9.5:1 ratio(with flat-tops). Now I'm stuck wondering which engine I should use for my 240 swap. From replys I've had from other posts, everyone says I should use the F54-P90 combo but it looks like its going to cost a lot more to make it rowdy. Are there any other threads saying how much horsepower each 280 makes? Again thanks, you're a west coaster too eh? Cool!

Well, there will come a point when you have to shave the heads if you are looking at wanting 10s, then raise the cam tower etc.

http://www.geocities.com/motorcity/2824/engine.html

http://www.geocities.com/MotorCity/2824/head.html

Good luck