[Rev]

Back in '71, I bought a Fiat 124 Sport Coupe. It was nifty little 2200 lb. coupe with a 104 CI, DOHC with a five speed tranny (uncommon then). In Europe it came with 2 single barrel carbs @ 125 hp. My US version came with a 2bbl vac. secondary carb. Well the thing which was supposed to be kinda quick was an absolute dog. The problem was that in making it pass US emissions tests, they just put in such a heavy secondary spring that it never really opened, at least not until redline.

I fixed the little bastard though. What I did was put that secondary spring on the other side of the secondary diaphram, effectively making it a mechanical secondary carb. It then ran as it should. Really quick.

Rev