Thread: Our Defender/County 120?

Originally Posted by Sparkie

RR

Did you come up with a solution to this or did it prove itself to be ok around the farm?



Have been doing a bit of thinking along the same lines, with the idiots on the road i prefer to watch them than the gauges, so I'm looking at backing off the fuel once the egt gets over a certain point.

The idea so far is to fit an arm to the cam that the "max fuel screw" sits against, and attach a small pneumatic cylinder onto that. Plumb the manifold pressure into it through a solenoid valve so it acts like a boost compensator, and start dumping pressure by modulating the valve when the egt gets too high.

For your application, just energise the solenoid for more go, and leave it off for the lackies.

Waiting for a couple of chips to turn up from the US that convert Thermocouple output to digital data so i can fiddle with it a bit more.

Does anyone have any idea if this will work or has been done before? My beasty is off the road until i can afford to fix it so i'm stuck fiddling with ideas for a while.

Sparkie.

Yup, found a very cheap and easy solution. I got rid of the lacky It has proven to be no drama around the farm. I haven't fueled it up enough to get hot anyway. When I get this air bag thing out of the way we'll be looking for an intercooler.

Originally Posted by lambrover

ha man can you please keep posting your progress as I am very interested in doing this to mine, how much was the kit/set up, what brand and how much travel in the bags.

I'll let you know all the details once done

Originally Posted by isuzurover

Bugger - you might beat me to it... Race you...

Better be quick, mine are being shipped on monday

Did you get them from trucksprings??? Which ones did you get?

I spoke to an engineer first so are limited on how radical I can go with this

I'm happy the share the measurements and part nos etc for my set up but will differ depending ride heights and shock lengths etc.

I took some measurements of the existing coil springs as follows.

Fully compressed = 210mm
Normal desired ride height=360mm
Full down travel =540mm

I'm using Firestone bags as comes in kit form (OA 4515) and seems to be approved

Just this kit will be a hybrid kit

The bag part no is AB0056
The piston part no is AB 0070

Closed height = 227mm
Fully extended=547mm
Very close to the money less 10mm I'll play with spacers and the top shock mounts til I get it spot on.
Wont have as much flex as my old rangie but will be a lot safer with big loads on and will still out do any patrol or cruiser So happy with that.

Biggest drama now is they don't recommend running the same compressor on the bags as the diff lockers. I cant see why it would be a drama Just run a bigger tank.

Tony

Originally Posted by Rangier Rover

Biggest drama now is they don't recommend running the same compressor on the bags as the diff lockers. I cant see why it would be a drama Just run a bigger tank.

Tony

Cheers Tony.

Can't you just run a manual setup for engineering - i.e. a valve with no in-cab adjustment. That way you can keep the engineers happy, and no 2nd compressor needed... After all I assume you will be changing things down the track to allow side-side adjustment???

Originally Posted by Rangier Rover

Biggest drama now is they don't recommend running the same compressor on the bags as the diff lockers. I cant see why it would be a drama Just run a bigger tank.

Tony

The problem that you need to overcome is the different pressure requirements fo rthe bags vs the lockers.

Originally Posted by slug_burner

The problem that you need to overcome is the different pressure requirements fo rthe bags vs the lockers.

That is no problem at all. ARB lockers are fine anywhere between 80 and 130 psi. I recall the airbags are 100 psi max. Simple really.

Btw - in my IIA I have a 15psi regulated supply to work my Maxi-Drive. No problem at all to set up. The rest of the system (including air tanks) sits at 130psi.

Originally Posted by slug_burner

The problem that you need to overcome is the different pressure requirements fo rthe bags vs the lockers.

Bags are good for 160psi, the lockers only need 100 psi to work properly. Should all work in harmony. Same compressor essentially.
Only issue I can see is airing up both bags and using the lockers at the same time and running out of wind.

Originally Posted by isuzurover

Cheers Tony.

Can't you just run a manual setup for engineering - i.e. a valve with no in-cab adjustment. That way you can keep the engineers happy, and no 2nd compressor needed... After all I assume you will be changing things down the track to allow side-side adjustment???

Yep, I'm going to do exactly that^^^^. Then a dual controller

Originally Posted by Rangier Rover

Bags are good for 160psi, the lockers only need 100 psi to work properly. Should all work in harmony. Same compressor essentially.
Only issue I can see is airing up both bags and using the lockers at the same time and running out of wind.

The lockers don't need much. However ARBs are annoying that they unlock if they lose air pressure... Maybe a one-way valve in the locker supply might be beneficial...