twice in one night

hi guys again
i have a job coming up that will require me to pull 3.5 tonnes ball park for about 4000 miles am considering getting another p38 but lpg are the story,s true or is she just as good on lpg long term
many thanxs twomins

Mixed opinons on here.

The only problem in 30K was actually caused by me other that that perfect.

Yes power is down, it's only noticeable (for me) if i have a bad day or road rage. but normal driving, no difference

cheers jay
what about long term and do you know if the 4.0 or the 4.6 is better dual fuelled
cheers twomins

No power loss on mine on lpg. In fact it runs better on lpg but I think that might just be the petrol trims have gone out.

You might want to consider whether you can access the filler with a trailer attached though - my filler is on rear bumper using one of the towing electrics cutouts and I won't know til I get round to fitting my towbar whether it will still be usable with a trailer on. Obviously won't be a problem if the filler is somewhere else though .

Get a diesel and chip it, bags of low down torque for towing, economical and more reliable. If your 4k miles is taking you to Europe, diesel fuel is cheaper too.

Running a 4.6 stage II tune.
She runs sweeter on LPG - smoother with more low down grunt, but better power on petrol at high RPM. No problems at all in 17,000 miles on the v8, and 100's of thousands on other cars (including a 235bhp Saab Turbo)

If you do fit a kit, make sure the underlying engine is 100%. LPG is harder to ignite, so it'll find any problems with your ignition. It also runs a little hotter - so make sure your cooling system is in good nick. Choose your installer carefully - there are a lot of cowboys about - go for reccomendations - I use HKL gaspower in Brum.

You do lose a little power (The LPG takes up more volume in the air/fuel mix than petrol, so you lose some volumetric efficiency) and economy (LPG has a lower calorific value - less energy per pint!) But as it has a higher octane, you can run a higher compression ratio (if you are rebuilding an engine specifically for LPG) and more ignition advance. But watch out when you switch back to petrol - it might pink/detonate.

Also, fit as big a tank as you can - once you are running on LPG, you never want to switch to petrol.

I have twin 36 litre sill tanks and two 40 litre tanks where the petrol tank used to be. Range is about 330 to 400 miles depending on journey and driving style. Have a small (70 mile) petrol tank in the rear wing. So have optimised it for LPG - and tweaked the petrol injection to run rich in order to avoid the pinking of the advanced ignition.

The engine runs a lot cleaner on LPG - plugs come out really clean, so does the oil.

Have fun.