I have a small shop with an excellent tech servicing a wide range of older sports cars, but we have limited Alfa experience. We recently took in a '73 GTV 2000 with Weber 45s and a header. We're the third shop to try to sort this car out. The car stumbles badly under any load, and backfires a bit when run at 4000 with no load. Compression is 175 psi. The car has an MSD 6BTM ignition (more suitable for turbo/supercharged, but should be OK for this) putting out a very strong spark. The plugs indicate lean running. What would be the recommended jet sizes for Idle, Main, and Air correction for this set-up? Any other ideas?
Thanks,
Thanks,