Exhausting Cam Question
The stock exhaust cam for the 80-81 2000 engine, 105200320000, is specified with the exhaust valves opening at 58 deg. DBDC and closing at 34 deg. ATDC . The 10548 “euro” cam has these exhaust events at 54 and 35 degrees respectively, very close it seems to me. Am I wrong to think that the 80-81 exhaust cam should perform substantially the same as the 10548?
The previous owner had the stock VVT intake cam replaced with a 10520 SPICA cam, year unknown., and I am contemplating using either a Centerline ‘Euro+” (10.5mm lift), or maybe even their 11.1 mm performance cam, on the intake only. The PO did have the engine rebuilt with 10:1 pistons, but I do not know of any other mods , such as porting, big valves, etc. The engine has dual Webers, a tube header, and as of this weekend will have a 123 ignition, set to use the 045 advance curve. I am looking for a nice, torquey street engine, not a banzai screamer. Thoughts?
81 Spider - 1980 VIN