[WFBowen]

nige: As I recall, this reactor dosen't just cover the two pipes, but exhaust enters and heats the entire chamber, resulting in the exhaust being heated as it passes through the reactor. It's basically a heat trap.My 912E had separate downpipes mounting to a flange, which connected directly to the heat exchangers.I'm not positive, but I think late 914 2.0's (&1.8s?)used the direct pipes, since they had CAT later downstream.My advice is to put the reactors on Ebay (they'll be gold in a year or two here in Calif.) Aside from the smog pump, a stronger timing advance curve might help,but keep in mind that the basic limitation of the L-Jetronic system is that tiny throttle valve. Cams/extractor exhaust/K&N filter, etc. won't do much. I've known guys (myself included) who have tried to tweak these engines by doing things like hooking up the coldstart valve to a manual switch; jumping up the fuel pressure; grinding (lightening)the air flap on the air sensor; adjusting the sensor arm to full rich & even jimmying the temp sensors so the computer thinks it's a cold-run situation.) None of these things did anything. Best solution down the road is Webers.
p.s.How in the heIl did you ever end up with one of these in the UK?