Thread: Snorkels and Tyres

Depends on the lpg system installed but most are a basic venturi system that requires engine vacum to open the diaphram that draws the lpg into the engine. A snorkle may cause the lpg to lean out by the ram effect of the snorkle but i dont have any first hand experience at this. One way around is to fit a donaldson type pre cleaner instead of the ram head supplied.
235/85/16's or 245/75/16's are both good tyre sizes for a D1 and require none or little trimming of the guards to fit, 235/85's being close enough to 32" will make takeoff a little slower and shouldnt put much extra strain on the driveline unless you have a heavy right foot.

Regarding snorkels, I found my air filters became dirtyer quicker. Lots more bugs and such plus dirt.
I fitted one souly because for deep water crossings.
If you do fit one you can always play around with the top piece to see which works best, IE: facing forward or turned to the rear. If rear facing works better, than fit a Donaldson filter. But be warned, scum like to nic them.
With my Pajero I had the head turned slightly in so as to pick up more air pressure off the windscreen. I know this worked because it picked up more bugs.

Yes what loanrangie said about the gas is correct with a snorkle it will cause the lpg to lean out , ive seen people reverse the ram on the snorkle or make a blind that sits a bout 50mm in front of the ram and that works as well

I had a snorkel on my previous RR with a venturi LPG system. I never seemed to have any problems with it (except for more crap and bugs in the filter housing).

Ron

On the SIII if I had an air ram on the snorkel, as I'd come off a freeway to a stop, the LPG cut off solenoid would click wildly and then stall the motor.

The LPG guy said that the sudden drop in air pressure made the LPG system "think" that the car had stalled, and the fuel cut off solenoid would cut supply. He tried to rectify this by venting the back of the LPG covertor (atmospheric side of diaphragm) to the air cleaner. This apparently works for most, but still didn't work on the SIII. So he put in a T piece to the venting hose so that it vented to air cleaner pressure as well as being moderated by atmospheric pressure. This gave a slight improvement and in the end I just ran a donaldson precleaner, which worked fine.

The LPG converter just needs the intake air pressure (dirty side of the air filter) as reference.
My County (3.9 with Disco fuel injection) used to cut out if I pushed the clutch in when driving into a headwind, even when changing down gears to turn a corner.
After RichardK let me have a look at his Rangie's LPG setup, I cut the flexible pipe that goes from the snorkle to air filter housing, inserted a piece of 3" pipe with a drilled and tapped hole and brass hose connector screwed in, and ran a hose from the brass connector to the hose connection on the back of the LPG converter.
Now, I can drive straight into a varying headwind in a storm, press the clutch in, and she just idles steadily.

Cheers
Andre