Thread: 4 cyl motor

Lean under load perhaps.

Originally posted by shaunp
Lean under load perhaps.

to the left or the right??? :?





sorry , couldnt resist that one ! ops:

Thanks for the comment.
If it is running lean do you know the adjustments on the carby to correct it? Or something else I should check?
The fuel economy is about 16mpg so I don't think it is too lean.

When I converted to ULP I had trouble getting a smooth idle. I was told the advance curve on the dizzy was too much for ULP and had the dizzy reweighted. Apparently the Land Rover has 30+ degrees of vacuum advance, which is too much for ULP. I still lose power going up hill. I've put the bosch 4 pronged spark plugs in and these made a noticable improvement (though they made no improvement to the Rangie), I've also added electronic ignition, no power boost from that, just for reliability. I've also removed the fan and run an electric fan on thermatic switch. I found that gave the motor more flexibility (pep) at 80-100kph. I'm now running LPG most of the time, so that puts a slight damper on performance, but gives the wallet a performance boost.

Which parabolics and shocks did you go for? I've used british springs paras with konis on the rear and rancho on the front.

Thanks for the reply Michael2.
My paras are Rocky mountain and explorer shocks. I have only had them on a few weeks so haven't had a real test of them but they are much better on the dirt roads.
As for the engine , I was wondering about the dizzy and the timing, I might try a few different settings to see what happens and try premium ulp to see if there is a difference as well.
Anybody had experience with weber carbs and the jet sizes?

Forget to mention...I have an electronic ignition kit from dick smiths which I made up to fit.I have tried it and it seems to work but it is not on at the moment. Need some more time to fit it permently.

I thought I would update what I have done so far to check the tuneup of the motor. Compression test about 125 psi per cylinder, timing at 6 degrees, idle at 800 revs and checked the settings of the idle and mixture screws on the carby as per the instructions. The mixture screw was set was too rich. The car seems to be running better but need a few more miles to check it and get a better idea on the fuel use.
On talking to a person who has some experience with webbers, he suggested it might be worthwhile to change the emulsion tube to a slightly larger setting and try it. It would be helpful to use a dyno with a few tubes and jets to try on hand. but at the moment it seems to be o.k. so will stick with this
Anthony [img]style_emoticons/<#EMO_DIR#>/smile.gif[/img]

And, anyone happen to know what the dwell angle should be for the 4 cyl motor?
Thanks