[David D]

I have a 911E 2.4 which was purchased with the engine dismantled due to the previouse owner having a look and its been a year of hard slog putting this baby back together. The parts of the engine were in a so called Porsche specialist workshop here in New Zealand. we suspected that bits had been robbed and just junk given in the box of bits we recieved.
We have managed to get the engine running but the engine back fires and splutters occasionaly through the inlet stack on the right hand side of the engine looking towards the front of the car from the back. after replacing the electronic ignition and having the mechanical injection unit apart and re set it still backfires on the right side front and back cylinders.
We had the cams re built and checked the cam timing as we thought a valve was bent on the inlet. I poured a small amount of petrol down the valve but the petrol stayed there for about 15 mins before we removed it so it looked as if the valve was seating correctly and a compression test came out ok.
After checking the cam timing we found that the valve was opening at about 35 degrees before TDC and the valve was in its closed position about 60 degrees after BDC which caused pressure back up the inlet valve. We re measured the left hand side timing and that was ok so presumed the Cam on the right hand side had been ground wrong. I sent the Cam back to the guys who re built the Cam for a re check and they said all was ok and they had borrowed a set of cams to confirm the profile to be ok.
We have the cam back we are about to re fit it again could you offer any advice on the cam timing and also the valve lift dimention.
could we have a cam gallery of another car?

I look forward to your help
Regards
David D