LPG on a Diesel engine

[Simon B]

Anyone had an LPG kit fitted to their diesel? Am thinking of it when the 2.8 Isuzu lump goes into my Land Rover?

Looks sensible, the Australians seem to like it.

[doggypaddle]

Theres a lot more things to do to the isuzu engine before LPG.
I hope its a 4jb1 your fitting and not a 3.1 or worse a 3.0
The fast warmup and EGR flaps can be removed from the inlet and exhaust manifold, and a less restrictive flange made to fit the turbo hose to the manifold. the exhaust size should be taken up to 3" immediately after turbo housing and a straight through system fitted. a front mounted intercooler of adequate size can be fitted,then the wastegate adjusted to take boost up from 10 to up to 20 psi and pump fueling adjusted accordingly.
when youve done all that then LPG may be worth considering for more power and maybe economy.
to be honest the 2.8 running an intercooler and well fuelled is all an LT77 5 speed gearbox can cope with you wont need LPG to bust it!
i ran a series 3 box(several actually) in mine for a year and it wasnt sucessfull i bust a layshaft and 2 mainshafts i run an lt77 now but its borderline strong enough.
i will try gas as well one day......too many projects and not enough time

[Nos4r2]

Originally Posted by doggypaddle

i will try gas as well one day......

Christ, don't ask me to get in your SII when you do that then

It was the bit where it kept accelerating harder and harder from 80mph upwards that got me

[Simon B]

Cheers Chaps,

That's saved me £1000. It is the 2.8 came with a free gearbox in case I break this one. Exhaust is standard 110 at present and I was thinking SAAB or Volvo 850 for intercooler.

[doggypaddle]

you cant have a cooler too big! its no point having cold air if the flow is reduced by restrictions.
i cant comment on saab or volvo ones but they probably arent big enough for max performance.
a landrover tdi one is too small, i have 2 grafted together in mine and 2.5 pipework, thats about OK.
If you intend keeping the LR try a jeremy fearn he does real nice ones .

[doggypaddle]

Originally Posted by Nos4r2

Christ, don't ask me to get in your SII when you do that then

It was the bit where it kept accelerating harder and harder from 80mph upwards that got me

Thets cos the intercooler is too small! it starts to work well by the time there is a 70mph wind through it

[Simon B]

Originally Posted by doggypaddle

i have 2 grafted together in mine and 2.5 pipework, thats about OK.
If you intend keeping the LR try a jeremy fearn he does real nice ones .

I was hoping to avoid Jeremy Fearn type prices, the volvo effort is about 21"x23" similar size with the SAAB but not anything like the bespoke jobs on offer at JF or Allisport.

Did you couple 2 together by running it through one then the other? sort like series are in parallel, would have thought this would not be wise as it'll go down path of least resistance.

Also wasnt sure if my old V8 air filter could be "dieselified"

[doggypaddle]

Alisport is 1000 yards from my house! i would use JF though he has been helpful in the past, good advice free.
well just fit one and try it, and measure the boost lost across the cooler 1 psi is fine ! the air being cold makes up for the lost pressure.

re my intercooler, i just used TDI cores, my mate is shit hot with the old TIG.
made new header tanks. couldnt fit anything bigger in the series two cos of the headlamps in the way!
you are right two coolers in series would be rubbish, parallel would be OK but the pipework would need two Y pieces, it would look rubbish.
I did mine on the cheap, all the pipework is steel exhaust tube, way cheaper than ALI. the coolers were sodbury sortout £10 and the silicon hose came from scrap landrover TDIs and a reducing elbow from samco cos i was short!!
V8 air cleaner will be OK if you can find somewhere to fit it.
is your landrover a factory fitted v8 110? if so the santana lt85 box is well strong!

[chewy]

Originally Posted by Simon B

Cheers Chaps,

That's saved me £1000. It is the 2.8 came with a free gearbox in case I break this one. Exhaust is standard 110 at present and I was thinking SAAB or Volvo 850 for intercooler.

If your after an intercooler try Braydon Motor Compnay, they're Volvo breakers and are real helpful.
My T5 is running 280bhp through the normal intercooler and I believe its good for loads more!

[doggypaddle]

should be big enough then, i never really looked at the larger car coolers when i did mine, as the 1960 series has the headlights in the middle leaving no room for a full width cooler, which is why i went down the route i did.
most coolers which would have fitted had plastic end tanks and or the pipes pointing the wrong way, ie into the radiator two tdi oned sise by side happend to be ideal when compined with Knobby and his TIG!