What is involved in fitting 1300 pistons in a 1600 711m engine with a flat faced head? Which rods do I use? Is there sufficient valve clearance? and will the standard GT camshaft be OK. There seems to be a great deal of confusion about clearance issues on other sites.

 

The 1300 pistons with fit the 1600 rods ok. If you are replacing dished pistons with dished pistons you are still ok. Are you using standard AE pistons or forged because if you use standard non forged pistons you will find the piston ring lands will collapse above 6-6500 rpm because of the increased compression ratio. Its a good way for good tourque increase but it depends on your pistons, for reliability. As for your camshaft you will be ok.

Also what are you using your engine for ? road, race etc

The piston ring lands are what the rings sit on i.e the thin alu part in between each ring.

Steve

 

Thanks for your quick reply cosworthmad. It is only to give a bit of exrtra oomph on the road The engine is actually in a kit car which originally had a turbo so the compression had been lowered with a combustion chambered head. The thing that worried me was that when I looked at the specs the con rod measurements between centres were different with the 1600 being slightly longer. I will follow your suggestion and fit forged pistons, Thanks. John