I am a firm believer in getting close to a zero deck height,in cars and motorcycles.
If you get a good quench area working for you,,, you will not need to run a water injection system, up to a certain amount of compression.
9.2 is not that high, but if your piston is sitting down the hole .070 @ TDC That can't be good.
It will most likely be a pinging monster!!
You can have an 8 to 1 motor that pings like crazy because there is no quench area(piston too far down the hole).
Then on the other motor you have a zero deck(or close to it) & have 9 to 1 that can run on the cheap gas.
It's all a matter of getting the quench area working correctly.
Two cents :-)
