Decided to take full advantage of the facilities at uni today and took everything in to flow test and measure etc.

Started out by measuring everything on my cylinder head from throat diameters, valve sizes etc. through to cc'ing the inlet port on my new spec head.

Inlet port


Exhaust port (ignore the gunk on the edges - just where the grease and parafin reacted with each other!)


cc'ing the inlet port:




Then it was on to flow testing the inlet and exhaust ports through 1mm valve lift increments:



I fitted up part of the Jenvey inlet so that there was a bell mouth for the port to breathe through:





Then it was on to cc'ing the cylinder head combustion chambers:


And the piston crown:


Then once the compression ratio had been confirmed, it was time to check valve clearances at full lift etc.

Plastecine on the piston crown:


Lift at TDC simulated:


Sectioned to measure clearance:


Compression ratio has worked out slightly lower than expected - not by a lot, it's still very much a high comp motor, but I might be able to get a bit more boost in it after all

Flow test results were very good, shifting well over 300CFM at full lift and with good flow properties at low valve lift too.

Hoping to get some more work done on the new front end cradle tonight too!