Re: eb air box explosion
the fact is you won't prevent airbox explosions. It is common to MANY makes of vehicles on LPG (probably most)
It has MORE to do with the quality of the LPG.
What the fuel suppliers won't/ can't tell you is that there are two types of LPG.
Propane and Car Gas.
What is the difference?
Propane is just that Propane.
Car Gas is a mix of Propane and Butane. In Victoria the legal limit for butane in car gas is 40%. A car properly tuned on propane WILL generate a fawn exhaust tip, butane forces a black burn (whatch a cigarette lighter).
The problem is that the addition of butane lowers the octane of the fuel, hence it is likely to burn early....heat is enough.
Nissan patrols suffer this worse than falcons, or any other model i know of.
There is no real solution other than to tune for propane and ensure you only fill with propane. Supagas in vic was the best place to fill up...pure propane, but as i haven't been lpg fueled for a while am not 100% if this is still available.
1. ensure the lpg entry point is as close to the throttle body as possible....some fitters put it in a 'conveniant' spot
2. fit an expansion chamber midway along the intake pipe (between the airbox and manifold)...similar to EL or EB V8
3. self manufacture a blow off/one way pressure relief, that lets excess pressure out between the manifold and airbox. What i am talking about here is a one way item that lets air out but not in...similar to body vents. This is the most effective method i have used to resolve this issue, but also the hardest!