My Dellorto Jet Combination Options

[Ansbacher]

I know every carb/engine combo is different, but for those of you with dual Dellorto DRLA 40s I thought I'd share a jet combo that finally performs very well on my '74 2.0 Liter. Note, I am basically at sea level here in the Tampa Bay area:

60 Idles
150 Mains
180 Airs
40 Pumps
Emulsion Tube .2
32 Vents
Pump Adjustment Nut almost all the way in.

Maybe this will help someone with a starting point. Took me a couple of years to finally get this right.


Ansbacher

[MarkV]

I have not checked the AFR...I suspect it is a little on the rich side. Before I put classic car insurance on it I had to pass emissions and it was always difficult to get the HC number low enough to pass. I am going by the plug and tail pipe color...both of which look good. The cylinder head temperature seems to stay around 275 in town. I frequent a mountain road that goes from about 3000 ft to about 8500 ft. and if I am pushing it in the summer the temperature can get to 350 degrees. Gas mileage is not great...maybe 20 MPG. The car runs well and doesn't really have any drive ability issues. There was an off the line stumble that took me a long time to figure out that turned out to be the ignition timing curve and not carb related.