next issue after reprofiling heads

[davidblythe]

Sorted out centring the face plate for re profiling cylinder heads and had a fun day enlarging diameters, skimming dud heads and then reprofiling them for various piston crown heights





next thing wanted to try was measuring the "actual" geometric compression ratios following JIMS ideas

shocked at how low the cylinder head volume was at 23cc on a 225, appreciate the figure of 9.5 for the above but am wondering what is the safe limit for the corrected compression ratio it is 6.0 to 1 on 95 ron and do people use this in preference to the GCR if the two are in conflict

articles and old books read seem to gloss over this area a little

numpty needs assistance from those in the know

[Andy Pickering]

Watching what youve doing the last couple of months david you could do with a bit of time noseying about MB...

[davidblythe]

numpty seeking elucidation