How do I reregister my car as dual fuel rather than petrol?

Is it true the emmisions are easier to pass for dual fuel cars?

In article ,
"Martin" wrote:

How do I reregister my car as dual fuel rather than petrol?

Fill in the right box on your V5 and send it in.

Is it true the emmisions are easier to pass for dual fuel cars?

Like many things with MOT tests, nobody seems to be totally sure, but
apparently if you present it running on LPG, they'll test in on LPG,
which means you're more likely to pass the CO part of the test.
However, if your LPG isn't set up properly, it might fail on
hydrocarbons.

"David French" wrote in message
...
In article ,
"Martin" wrote:

How do I reregister my car as dual fuel rather than petrol?

Fill in the right box on your V5 and send it in.

Is it true the emmisions are easier to pass for dual fuel cars?

Like many things with MOT tests, nobody seems to be totally sure, but
apparently if you present it running on LPG, they'll test in on LPG,
which means you're more likely to pass the CO part of the test.
However, if your LPG isn't set up properly, it might fail on
hydrocarbons.

I'm not sure you get the option now with the new electronic MOT. When I had
mine tested last time, as dual fuel is on the logbook, the testers equipment
defaulted to LPG only. The limits weren't anywhere near as generous as the
previous older type MOT (non cat test for LPG). The CO limit used to be 3.5%
& now is 0.30%. My previous car wouldn't have had a chance in passing with
these limits whilst switched to LPG. Fortunately my current car has a SGi
system & wasn't a crap closed loop emmegas system fitted by cowboys (who are
now out of business) like my previous car so it passed with plenty of room
to spare.

Nedavno Dave Griffs pise:

| The CO limit used to be 3.5% & now is 0.30%

How do you tune your engines now? Hire is what I found in this group
archives (by Austin Shackles):

"Run the engine at idle, and set the CO to about 2.0% using the above
combination of adjustments, then run the engine at about 3000 rpm and
adjust the maximum flow adjuster (in the pipe between the vapouriser
and mixer) to give CO about 0.5-1.0%, then drop it back to idle and
re-check the idle"...

But if CO limit is 0.3% now...

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"Yvan" wrote in message
news:20061206213732.6b32cc1f@localhost...
Nedavno Dave Griffs pise:

| The CO limit used to be 3.5% & now is 0.30%

How do you tune your engines now? Hire is what I found in this group
archives (by Austin Shackles):

"Run the engine at idle, and set the CO to about 2.0% using the above
combination of adjustments, then run the engine at about 3000 rpm and
adjust the maximum flow adjuster (in the pipe between the vapouriser
and mixer) to give CO about 0.5-1.0%, then drop it back to idle and
re-check the idle"...

But if CO limit is 0.3% now...


This is the tuning proceedure for an open loop systems on a carb setup, pre
1993. If you've got an open loop system running on anything later, you may
have problems. Most systems now will be closed loop (using a lamda sensor to
control the mixture), or better still, a SGI system.

Nedavno Dave Griffs pise:

| This is the tuning proceedure for an open loop systems on a carb
| setup, pre 1993. If you've got an open loop system running on
| anything later, you may have problems. Most systems now will be
| closed loop (using a lamda sensor to control the mixture), or better
| still, a SGI system.


Is it possible to convert open loop system on a carb setup to a closed
loop? What do I need? To fit a lamda sensor in exsaust, control valve
in front of a carb (and after evaporator), and a control unit that
connects sensor and valve? Is it that simple?

Will than mixture be automatically adjust at all conditions (cold
start, warm and hot idle, partial and full throttle...)?




--
___ ____
/__/ / \ ** Registrovani korisnik Linuksa #291606 **
/ / \/ /\ \ ** Registered Linux user #291606 **
/__/\____/--\__\ ** http://counter.li.org/ **

"Yvan" wrote in message
news:20061210080144.40d8e8ef@localhost...
Nedavno Dave Griffs pise:

| This is the tuning proceedure for an open loop systems on a carb
| setup, pre 1993. If you've got an open loop system running on
| anything later, you may have problems. Most systems now will be
| closed loop (using a lamda sensor to control the mixture), or better
| still, a SGI system.


Is it possible to convert open loop system on a carb setup to a closed
loop? What do I need? To fit a lamda sensor in exsaust, control valve
in front of a carb (and after evaporator), and a control unit that
connects sensor and valve? Is it that simple?

Will than mixture be automatically adjust at all conditions (cold
start, warm and hot idle, partial and full throttle...)?


I'm no expert, but the basics are you can buy a lamda contol kit. A hole can
be drilled into the exhaust downpipe, a nut welded on & a lamda sensor
fitted (I'm not sure what you'd do if you had a V8 with twin downpipes). A
stepper motor controlled flow adjuster can be fitted where the old manual
adustable one was fitted. The complex part is the setting up, it most cases
you will need to interface the control box to a laptop, with the setup
software running on the laptop to tune the system. The system works in all
conditions except for when the lamda sensor is warming up, usually for
around 30 seconds after startup. In this condition the mixture setting will
be a fixed setting adjustable via the laptop. I'm sure there are more
members on here that can provide you more detail if you plan to go ahead
with this.

Dave

Nedavno Dave Griffs pise:

| Will than mixture be automatically adjust at all conditions (cold
| start, warm and hot idle, partial and full throttle...)?
|
|
| I'm no expert, but the basics are you can buy a lamda contol kit. A
| hole can be drilled into the exhaust downpipe, a nut welded on & a
| lamda sensor fitted (I'm not sure what you'd do if you had a V8 with
| twin downpipes). A stepper motor controlled flow adjuster can be
| fitted where the old manual adustable one was fitted. The complex
| part is the setting up, it most cases you will need to interface the
| control box to a laptop, with the setup software running on the
| laptop to tune the system. The system works in all conditions except
| for when the lamda sensor is warming up, usually for around 30
| seconds after startup. In this condition the mixture setting will be
| a fixed setting adjustable via the laptop. I'm sure there are more
| members on here that can provide you more detail if you plan to go
| ahead with this.

It looks to me that this group is almost dead. It used to be more posts
in a day, then there is now in a week, so I do not believe I will get a
lot of answers. And this is the only LPG related newsgroup that I found
(in English).

So if I want to change my system to closed loop I should only find
lambda control kit. That kit only needs input from lambda sensor, and
no connection to ECU or other sensors is necessary? And no further
modifications are necessary (I can use the same evaporator, and little
knob on it for adjusting idle will have no use)?



--
___ ____
/__/ / \ ** Registrovani korisnik Linuksa #291606 **
/ / \/ /\ \ ** Registered Linux user #291606 **
/__/\____/--\__\ ** http://counter.li.org/ **