V8 on Gas intake

[jezz]

Hay Landy lovers .. can anyone give me an idea of what to do for a costom intake for a 3.9 on gas? if anyone has pics of there engine bay on gas can you post up please.. ill take a pic after work today so you's can see mine.
i am having issues because the original pipe is cut..

dos anyone ells have the same issue??

[loanrangie]

What type of system do you have fitted now ? there are the impco type, the gas ring complex and the sequential injection. Could also fit a gas research gas carby directly to the intake plenum - really depends on the $$ you want to spend.

[jezz]

sorry didnt explane myself that well.. the gas side of things is fine it is injected just before the throttle butterfly. so the pipe is longer than normal so the original rubber pipe is kinked, so i have done away with the original box filter and put a pod filter on

dos that make more sence..?

[loanrangie]

sorry didnt explane myself that well.. the gas side of things is fine it is injected just before the throttle butterfly. so the pipe is longer than normal so the original rubber pipe is kinked, so i have done away with the original box filter and put a pod filter on

dos that makes more sence..?

Ok, so i'm not 100% what your asking, do you want to stick the orignal filter box back in but the hose is kinked and restricting flow ? What mixer is it ?

[jezz]

dos everyone use the original intake hoses and filter box or is there some other way of making them flow better. sorry for confuzing everyone

just trying to get some ideas of how to work the plumbing out..

need to make up a box for the pod to sitt in and make some tube to go with it..

iv confuzzed my self:angel:

[ladas]

On my D1 with gas I had the 'old type' cylindrical airbox from a RR classic (I think) and it all fitted under the bonnet very well.

[Utemad]

I use the original air intake. I think the LPG installer cut out a section of the intake so the hose didn't kink.

I want to get a snorkel as I have a second battery right in front of the air intake which I'd say would restrict flow somewhat.

[loanrangie]

dos everyone use the original intake hoses and filter box or is there some other way of making them flow better. sorry for confuzing everyone

just trying to get some ideas of how to work the plumbing out..

need to make up a box for the pod to sitt in and make some tube to go with it..

iv confuzzed my self:angel:

Ok, so you have a complex type mixer ring, that isnt very long so i would just use the original filter box and replace the intake hose with reinforced hose that will be less likely to kink.

[DeeJay]

I know I had pods on my County motor- same as yours- and the LPG fitter said he could'nt tune it until I retrofitted the original filter. He said there was not enough vacuum resistance. He says (I'm not so sure) it was peculiar to the Rover motors.
Regards,
David

[GrahamH]

Hi Jezz,

I believe my vehicle is substantially the same as yours and I've got some photos of the mixer install here you should find useful.

I used the original rectangular air filter box but I modified the outlet slightly by cutting a vee in the passenger guard side of it to allow me to straighten the outlet by about 10º. I got a guy who does mobile plastic welding repairs out of the yellow pages to drop by and "weld" up the joint - you can see see the result in LPG Converter 2. I saved the piece I cut out which he used as a filler rod - it's easier with the right plastic to fill the gap. He essentially uses a soldering iron to do this but he's well practised at it and made a nicer job than I could have.

Doing this swung the airflow meter across toward the guard enough to accommodate the mixer ring - almost. I still had to cut a vee from the inner edge of the rubber elbow at the plenum end to squeeze it in between the airflow meter and the mixer ring - you can see this effect in LPG Mixer Ring.

I had a snorkel already installed and you can see the overall arrangement in Engine Bay.

You may notice that I've got a stepper motor type power valve installed - I put an 02 sensor in the exhaust pipe at the Y in front of the main muffler to provide the feedback signal for the controller. It works extremely well and the vehicle drives the same on gas as it does on petrol with good economy on gas.

Looks like you've already done the hard bits - this stuff is relatively straight forward once you can see your way around the problem of the tight bends.

Good luck.

[rovercare]

Ok, so you have a complex type mixer ring, that isnt very long so i would just use the original filter box and replace the intake hose with reinforced hose that will be less likely to kink.

No its a simple mixer, complex convertor:p

No such thing as a simple mixer ring;)

Get some suitable pipe to fit, thats all

[Utemad]

You may notice that I've got a stepper motor type power valve installed - I put an 02 sensor in the exhaust pipe at the Y in front of the main muffler to provide the feedback signal for the controller. It works extremely well and the vehicle drives the same on gas as it does on petrol with good economy on gas.

Hi Graham,

I'm looking into this stepper motor setup you have. What is required over a standard setup? Mine looks the same as yours except for the stepper motor on the power valve.

I'm about to order the oxygen sensors for the 14CUX and do that so thought I might be able to just order/add this sensor while I have everything apart.

[rovercare]

No its a simple mixer, complex convertor:p

No such thing as a simple mixer ring;)

Get some suitable pipe to fit, thats all

That should say No such thing as a complex mixer ring, where's the Edit button gone:(

[Utemad]

This is an interesting link.
Tinley Tech Limited System Upgrades (http://www.tinleytech.co.uk/acatalog/System_Upgrades.html)

It has kits for lambda control and vacuum control.

Vacuum control is cheaper and easier to install but lambda control is better. According to their website anyway.