9.2:1 CR in 327?

Posted by Tobs On 2012/6/23 9:46:47

Hi guys,
typing this a second time, grrrr.

Anyway, my 327 is slowly going together, and was bored +.020 making it a 331 now, (yay) and I have a 288 AT head which will raise the CR to 8.38:1
The engine builder said the head needs to be milled .020 to clean up the marks in it from the old head gasket(s) which I saw, and are pretty obvious.
So, I did some math, and my new compresion ratio will be about 9.2 or perhaps 9.3:1 (I approximated the reduction of chamber volume as 4 cylinders .020 high and surface are of the piston, 2 valves and a spark plug)

I know this is higher than the max stock CR from packard of 8.5:1, but we do have higher octane gas here in germany, (91,95,98 and 102) which I can run.

Is this CR going to be driveable? I'll be super careful for ping, and the engine builder is cleaning out all cooling passages in the block, so that should be up to snuff...

I got chrome acorn nuts for the head, so it will look all 'hotrod'. Will this CR be hotrod, or ping city? It is going to be 327 with OD in a 2 door with no power options...

Thanks, Mike