10548 cam in a 116 2l

[Ian 2l]

Hi guys. Thought I would ask here as it seems the closest to what I am asking on any forum. Recently given a blue printed 2 litre engine to a friend to use in his Guilia - his 1600 is stuffed (but I think in time he will but an original 1600 back in). The 116 2l has been modified about 20 years ago: balanced, lightened, hi comp pistons, flow ported, match ported, valved swirled, 10548 cam, rejetted, etc. Ran very nicely -??guessing 180ish HP maybe and retained good torque. Now as I said it was 20 years ago.  But When it was build we retained the 116 verniers with the 10548 cams and the mechanic recalibrated the cams and moved the timing relative to the marking on the cam bearing housing, moved them approx 3-4 mm or ??approx 5 degrees. The 116 engined basically needed to stripped to machine the spigot in the crank and when it was re-assembled the guy reverted the timing (via verniers) to the original (corresponding cam/bearing housing) timing marks Am i dreaming or is my recollection correct? When using a 10548 cam in a 116 engine, does the timing need to be adjusted rather than just follow the marking from the factory. The use of the 116 verniers may be irrelevant. thanks in anticipation. Ian

[festy]

102/102 lobe centers is the factory cam timing for 10548s IIRC.
Use Centerline's cam template to add new marks - http://www.centerlinealfa.com/modules/fileSharing/download.php?id=536
   

[Ian 2l]

Thanks. I recall the mechanic at the time changed the timing, not much maybe only a few degrees. It was mainly to address the pinging from the higher comp pistons. Cheers Ian

[carlo rossi]

that would have been the ignition timing only

[El_4_Romeo]

180hp seems quite optimistic for a standard set of cams.