Have you got your Engine on dual timing? LPG burns much better at 16-18 degress BTDC petrol should be around 6-8. I just put a dual timing kit on my efi and noticed an immediate difference. Not sure how this applies to diesels tho?

MikeV8SE said:

Well the tyres are new, all four air springs are new and the rear shocks are new and the local garage reckons all the bushes are OK, so I'm stuck! The EAS keeps the car level. There was more weight over the front of the trailer than the rear.

Maybe it is the tyres - but which element? Pressures were correct. Is it the size? Or type (chunky A/T's)? Or the fact they are Insa Turbo's (remoulds)??

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Up the rear tyre pressures if they will take it, chunky AT tyres have big tread blocks which move around more. Fit a new anti snaking hitch or an aftermarket anti snaking kit. Worked wonders on my race car transporter If the load is light in the middle but heavy at both extremes it will have high polar moments of inertia which will encourage snaking. Most weight centred over the axles is ideal, but not easy to achieve with bikes, but obviously it should be nose heavy, I think the P38 will stand 150Kg on the hitch so aim for something like that which I'm sure the classic will stand too.

waterdude said:

Have you got your Engine on dual timing? LPG burns much better at 16-18 degress BTDC petrol should be around 6-8. I just put a dual timing kit on my efi and noticed an immediate difference. Not sure how this applies to diesels tho?

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Is that static timing, if it is it must change the timing when on gas whilst the engine is running. Lots of back firing a spitting with static at 16-18 degrees on startup. Can't apply to diesels you can't run them on LPG.

Dynamic. You time it on gas as a base 16 degrees BTDC, when it is running on petrol the bit of kit retards the timing back to 8 degrees so no spitting or back firing on start up.

start with the basics
1. road tyres
2. bushing, rear axle bal joint, steering joints worn steering box
3. condition of air springs.
4. did you lock the eas for towing or leave unlocked?

waterdude said:

Have you got your Engine on dual timing? LPG burns much better at 16-18 degress BTDC petrol should be around 6-8. I just put a dual timing kit on my efi and noticed an immediate difference. Not sure how this applies to diesels tho?

Click to expand...

No, never heard of such a kit. Do you have a website link?

Datatek said:

Up the rear tyre pressures if they will take it, chunky AT tyres have big tread blocks which move around more. Fit a new anti snaking hitch or an aftermarket anti snaking kit. Worked wonders on my race car transporter If the load is light in the middle but heavy at both extremes it will have high polar moments of inertia which will encourage snaking. Most weight centred over the axles is ideal, but not easy to achieve with bikes, but obviously it should be nose heavy, I think the P38 will stand 150Kg on the hitch so aim for something like that which I'm sure the classic will stand too.

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The max psi on the Insa Turbo Traction Tracks is 36 psi. I inflated them to 34 psi rear, 28 psi front - pretty much Land Rovers base recommendations anyway.

wammers said:

Can't apply to diesels you can't run them on LPG.

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Actually, you can now...either a full conversion with spark and lower compression (Can Diesel engines be converted to run on LPG?) or adding LPG to the diesel for more efficient burn (LPG Diesel Conversions). It's all change in the world of LPG!

vougese39 said:

start with the basics
1. road tyres
2. bushing, rear axle bal joint, steering joints worn steering box
3. condition of air springs.
4. did you lock the eas for towing or leave unlocked?

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1. Yes, I think the tyres are the main issue here, causing much of the snaking and also some of the drop in performance
2. All the bushes were recently checked and given the OK. How do you check/tighten up the steering box?
3. All four are new, I changed them last week
4. EAS was locked to stop it lowering whilst towing

I am thinking of changing the tyres for Insat Turbo Rangers (remould of the BFG A/T tyre), or possibly General Grabber's/Goodyear Wrangler - something more road biased anyway. Hopefully this will stop a lot of snaking issues I had with the trailer.

Actually, you can now...either a full conversion with spark and lower compression (Can Diesel engines be converted to run on LPG?) or adding LPG to the diesel for more efficient burn (LPG Diesel Conversions). It's all change in the world of LPG!

And what the hell does a diesel engine with lower compression and a spark become?

Yes you can add LPG to a diesel but there has to be diesel injected to initiate the burn. LPG is not compression ignitable.

So when i say you can't run a diesel off LPG it means you can't run it off LPG alone. It's not possible.

wammers correct,lpg with diesel good!works a treat..

MikeV8SE said:

No, never heard of such a kit. Do you have a website link?

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Clicky on link below.

Stu.

RPi Engineering - V8 Engines