hi all trouble with a 2.25 series 3 land rover

hi all new to the site just thought i say hi i drive a 1975 swb series 3 2.25 petrol landrover
just haveing a couple of problems with it the main one been the lack of power we only have it for towing and the moment it sees a hill it runs away as fast as it can go 47mph
thats the other thing that seems off it has a recon engine with 2k since it was rebuilt new carb all been set up and converted to electron ignition timeing been all checked and k and n air filter out but it will still only do 47mph flat out and dies at the smallest of hills when it isnt towing so its a lot worse when it is any help would be great thanks ian

How much power/speed were you expecting from it? They aren't fast at the best of times and yours is over 35 years old so probably not as healthy as it might once have been. Plus the speedos are never very accurate so your 47mph might be anything from 30 to 70

i was expectining a bit more considereing its had a recon engine, new carb , k and n air filter new dizzy and converted to electronic ignitin the speed it was doing the 47mph was the speed from my sat nav which i know if right so is this a normal speed people get out of their series 3 landrovers

That's way too slow - what carb did you fit? How did you check the ignition timing? Is the fuel feed to the carb sufficient? Who did the recon? How good is the transmission chain?Are the brakes binding? Are you definitely in 2wd and high box?
You should be able to get 70 to 80 mph out of a petrol with a good engine on the flat.

hi thanks for getting back to me the brakes arnt binding its deffently in high ratio 2wd the carb thats fitted is a zenith which i brought from craddocks along with a new fuel pump it also has a inline filter (aftermarket) when its on tick over you can see theres petrol in the filter the landrover glass filter is also full and has been cleaned out
when the timeing was checked ( with a stobe light ) it was done at my local classic car garage were they set up the carb too
the engine was done at a local engine builder whos been in business 25years
im at a total loss with the problem im all most about to throw in the towel in

It might be worth resetting the timing by ear - mark up the position of the dizzy warm up the engine, slacken off the pinch bolt and rotate the dizzy. Advance until it just starts to falter and then back off a little - the timing marks on the pulley aren't always reliable. Failing that you could try replacing the dizzy - I've had an faulty electronic unit that would happily start and tick over but wouldn't rev. Ooh, there's a thought - some coils don't work too well with electronic sparks.
My only other thoughts would be badly set valve timing (not difficult to achieve) or just a very tight rebuilt engine.

yeah, 47 MPH, thats not right! Take plugs out and have a look at those, might give a clue to what its doing.

thanks guys ill go and have a play sunday thanks again