Finally got around to retuning my propane kit:
No that's not me. That's a technician at the LPG-installer, retrimming the propane injectors. They run off the stock gasoline injector maps, with extra duration added to make up for the lower energy content. We added a ton of duration (500 milliseconds on propane compared to 360 ms on gas) and still got some flat spots. Told them to leave it at that.
What happens if you have a high pressure radiator cap and forget to tell the technicians not to open it when hot? You get nice coolant stains all over your engine bay.
Here's a close-up of the propane solenoids (red, above strutbar) and the propane fuel filter (brass, by breather...) The breather is there because I'm trying to trace a vacuum leak, and I'm eliminating all the usual suspects. Yes, my vacuum lines are a mess of T-fittings and different lines. When I have the time, I'm replacing all of them with high-quality silicone.
Retuned computer number two (LPG computer is computer number three... stock ECU is computer number one), my Unichip Q piggyback at home. Took away some timing advance at low rpms and it seemed to help running on propane. Which is counter-intuitive, since propane
loves timing advance. Still not perfect. Going to try two or three different maps with different timing to see which propane likes best. Need to do this with a separate piggyback because the LPG computer doesn't do timing.
Propane switch. Yes, it's ghetto. And yes, the car is pretty damn dirty.
At least I had it waxed.
Brake dust? With performance pads and cross-drilled brakes, it can get pretty nasty!
Puny tip, eh? Funny thing is, it's 2.5" wide. I wanted the flow without looking like a dork. There's a straight-through can behind that stock-looking tip. (Which looks more stock than the stock tip did)
Car still sounds dorky, though:
Youtube doesn't do it justice. It sounds deep, bassy and sexy here. In real life, the flex-pipe razzes, the trim rattles, and the thing drones like a Civic at part-throttle on the highway.
![LOL :lol: :lol:](/wp-content/themes/gtp16/images/smilies/lol.svg?v=3)