Dag-dag - LPG injection

[Rusty]

Speaking to a mate it seems that LPG injection on a dag-dag is a pretty cool idea! I think that it's the next step in dag-dag tuning!

[Dubbedup]

Was reading an article in PPC mag, about a Mercedes Sprinter van that had the LPG Injection system fitted, from 110 bhp to 190bhp..With an addition of sheds and sheds of torque. If you are going down that route PM me, I have a great contact at a company called FES Autogas, and what these guys dont know about LPG aint worth mentioning.

[Rusty]

Sweet!

Shame I don't have a dag-dag

[Dubbedup]

Sweet!

Shame I don't have a dag-dag

Ah right, easy way to rectify that...Buy one..

[bernsaudi]

lpg gas injection

hello folks,
gas and turbo cars.................a dark art
first off, there is no STANDARD kit that will produce the kind of power anybody here needs without it working at 100 percent duty or more. turbo gas regs cost more cash then standard regs, and can still give a approx maximum of 300hp. Next thing,if you run a gas system (or any other system) at 100 percent duty, it will either fail or meter fuel incorrectly. At full output for extended period, an 'injection' regulator will process more fuel out than it has the ability to effectively heat, so you end up with gas going into the manifolds which is at a very low temerature.
On my audi, I am currently working on a solution to this.
I would very much like to hear from any owners that have gassed thier s2's, so I can advise. I have been involved in the lpg automotive industry for a long time, and I will try to offer the best solution for the s2. My work does not allow much time for me to get on with this, but I am still trying.
Rule of thumb for me is if you fit a reg to one of these cars, make certain it can develop more than 400hp,

[bernsaudi]

oops, didnt notice the diesel thing going on, sorry.
gas and diesel, a lovely solution is using gas to turn it into a super diesel, and it is lovely.
Look for 10 percent, and remeber you dont need electronics to do that, jus make sure the gas dont come in until 15 percent throttle

[Faheemo]

Look for 10 percent, and remeber you dont need electronics to do that, jus make sure the gas dont come in until 15 percent throttle

10 percent ??

So you could make a BM 330d eat M3's ??

[Greg_S]

Sound interesting, ive heard of diesels using LPG but never really read too much into it. On subject of turbo LPG conversions greenfuel LPG conversions claim to offer conversions for S2, S4 and RS4's

[Jamo]

The LPG conversion isn't hard, it's the mapping of the LPG ECU that is.

I know 3 people with turbo cars running LPG and they all have problems in the higher rev range with hesitation.

So make sure they map the LPG correctly!

Also LPG conversions have now gone up to around 2k!

[Rusty]

LPG is a higher octane fuel than "pump gas" so in theory if you get it setup correctly then you should get more from it. The main problem is that the add-on kits just aren't sophistocated enough to cut the mustard.

This thread was about adding it to a diseasel and that's a good plan for power and therefore fun! Have to wait and see what happens.

[Dubbedup]

hello folks,
gas and turbo cars.................a dark art
first off, there is no STANDARD kit that will produce the kind of power anybody here needs without it working at 100 percent duty or more. turbo gas regs cost more cash then standard regs, and can still give a approx maximum of 300hp. Next thing,if you run a gas system (or any other system) at 100 percent duty, it will either fail or meter fuel incorrectly. At full output for extended period, an 'injection' regulator will process more fuel out than it has the ability to effectively heat, so you end up with gas going into the manifolds which is at a very low temerature.
On my audi, I am currently working on a solution to this.
I would very much like to hear from any owners that have gassed thier s2's, so I can advise. I have been involved in the lpg automotive industry for a long time, and I will try to offer the best solution for the s2. My work does not allow much time for me to get on with this, but I am still trying.
Rule of thumb for me is if you fit a reg to one of these cars, make certain it can develop more than 400hp,

Interesting on the 20v turbo LPG...Having driven one (advertised on here and drove like a pig, and I have since found out the seller and the guy that had it advertised knew that,but that's another story ) I looked into LPG'ing the S2/S6 and the only way that I could come up with a way of being able to feed the engine enough gas, was to have a vaporiser for 3 injectors and a smaller one for 2 injectors.

Ideally get rid of the Petrol system alltogether and then you will have an ECU that is fully programable via a laptop.

[Jamo]

LPG is a higher octane fuel than "pump gas" so in theory if you get it setup correctly then you should get more from it. The main problem is that the add-on kits just aren't sophistocated enough to cut the mustard.

This thread was about adding it to a diseasel and that's a good plan for power and therefore fun! Have to wait and see what happens.

Don't let the octane fool you, it's higher but you require more LPG to get the same burn as petrol or Diesel ( Same with Bio fuel ) also it's a dry fuel, it does not lubricate.

You can't add extra lpg to lower EGT in the same sense as you could do with petrol.

@Dubbedup turbo cars need the multipoint LPG kit where as NA can get away with the single point.

[Greg_S]

Other option is when the throttle is opened up above a certain point the system switch back over to petrol injection

[Dubbedup]

Other option is when the throttle is opened up above a certain point the system switch back over to petrol injection

I know what you mean, but it kind of defeats the purpose....

When I was working on fitting my own LPG kits, if the system switched to petrol on load there was a problem with the system, either electronically or the vaporiser was too small for the application.

LPG is the route for more power. Whilst it does have a lower calorific value to petrol, it buns colder..Thus great for turbo applications. Just the whole fueling parimeters that need to be sorted out under boost.

Once converted a 1.0 Polo Mk4 to LPG, and with Petrol and LPG tanks full you could do approx 700 miles on a run without filling up either tanks....Would only pull 90 mph on LPG though...But it was an open loop system, so very primative.

[Rusty]

A friend is running LPG on his BMW 318is but he has a fully mappable ECU (Megasquirt) so has mapped it for LPG. RR figures were 164bhp on petrol, 160bhp on LPG. His LPG system isn't top end either.