View Full Version : Can I reduce the size of my engine with a corresponding weight reduction?

04-02-2013, 07:17 PM
Greg Amy: Can a competitor reduce the size of their engine and get th corresponding weight reduction> Specifically, would a competitor be allowed to build a 1500cc engine from a stock 1600cc engine and get the weight reduction from 1600 to 1500. Thx. racermr2

04-02-2013, 09:28 PM

Greg Amy
04-02-2013, 09:33 PM
You're talking about de-stroking and/or sleeving (or whatever) for smaller bore? Then Chris is correct, that's not allowed. Remember, the weight/displacement chart is based off of the original engine displacement, which does not include the allowed overbore...

However, if you were to find a family 1500cc engine and install that, then yes, you can use the weight for the 1500cc engine.

- GA

04-02-2013, 11:59 PM
RacerMR2, have you considered asking for the AW10's 3A to be approved? :0