nick a

up in the cotswolds mate, i know stuart edwards and barcley williams when i worked for an independent ag engineer we use to get hydra shifts overhauled there. soon to start a new job with jd dealership at evesham.

barcley williams the david brown specialist close to you at honey bourne use to run a lot of bomfords on db tractors in his contracting days. i operated a long reach contractors bomford 580 on a tw15 on road/rail jobs the centre knuckle in the arm was a very weak area .

i prefer the original version, whats them orange lights about is that to meet homolagation for other countries?, the real tractors seen here are the same as mk1 uh version and in small brochure issued by dealers.

what are the differences between sima fastrac and ordinary shelf version please

i have pictures somewhere in the depths of beyond of a ford 4000 select o speed that use to drive a claas 60 jaguar and tow load in fairness it did only operate on flat ground.

yep you probably right on cubic capacity and flywheel i havent checked data/specifications, did ford 4000 engine have greater r.p.ms aswell- they certainly were lively performers. ford tractors and conversions with ford 2700 series 6 cylinder enines certainly could be smokers and very thirsty. on the subject of cubic capacity IH 674 engine was close to the capacity of a ford 7000 andcould be fitted with the same turbo, but due to valving/porting etc could not achieve seem gross horsepower but could provide good boost in p.t.o horsepower.

not just ford mate! i have been involved in v8 stock car racing too with chevy 350 cu.in v8 engines. the rules state original block no re-bores or skimming to increase cu.in,standard rods & pistons. we altered engine output and torques through r.p.ms,fuelling and timing . we could advance timing, alter fuelling and revs on rolling road dyno. make a note of all settings so we could change the engine tuning for different tracks if you want more power for acceleration or top end grunt down the straights. come scrutineering even if they call for engine strip hey presto all legal and above board. those who knowledge and access to rolling road dyno and timing gun at an advantage. the other way of tuning horsepower to the track is changing gearbox ratios to suit each track with a nash racing gearbox. bit similar to a power harrow gearbox you can quickly change the gears around.

if any of you fancy having a go at tickling your tractors fuel injection pump to increase horsepower remember this only works to certain degree then you end up over fuelling them getting lots of black smoke/unburnt fuel. the fun old saying no poke without black smoke the engine for its cubic capacity is producing its maximum and aswell as drinking the fuel its wasting it. some makes were just more fuel efficient than others before these emission regulations came in, and we all know which they are. before the ford bashers jump up and down with glee dont tar all fords with same brush!. the three cylinders never smoked or the bigger 401 cu.in six cylinders, the fours smoked more often why ? fords were pumping in the maximum fuel to get maximum power output. mf used to be the same with perkins engines admittedly not quite to the same degree. it shows how much design has moved on. why you get that big black cloud when you open her up - wasted unburnt excessive fuel.

spot on nige greater cubic capacity

take a diesel super stock tractor pulling engine that leaves the factory say for instance with a cubic capacity of 236cu .in rated a 75 horsepower governed speed 2200rpm. you then add two stage turbo charging to that engine with intercooling you get increased dense forced increase in cubic capacity. throw in lots more fuel and increase the revs you get around 1500 horsepower out of the same block. thats exactly what the massey lads tractor pulling team did with a massey ferguson 265 the most successful smallest capacity diesel engine tractor puller.

i guess horsepower has always been the accepted way of expressing engine output, the original meaning of horsepower was the amount of work a horse could achieve within one working hour. if you look at tractor brochures now in particular the engine output is expressed in many terminologys. the most effective true rating of horsepower has always been the D.I.N. rating this rating gives true rating after frictional losses in engine and with all ancilliarys on the engine eg water pump,alternators etc the engine as installed. all tractors have frictional losses and power losse through to the pto, some more than others. pto rated horsepower is usually rated on the best torque curve, nowadays engines can be fuelled on pto work to provide extra horsepower. manufacturers these days with common rail technology do not have to have a wide range of cubic capacity engines to create a range of horsepowers and torque figures. most manufacturers have only one or two different cubic capacity engines and tailor output through engine management and fuelling. making the same engine perform differently and at different horsepowers and torques. manufacturers provide all this on there spec sheets, so when people ask which is a good tractor and which is a bad tractor when you understand the horsepower/torque you can get an idea. of course many many factors are condidered good/bad tractor manufacturers even often give fuel consumptions in dyno conditions although obviously tractor engine loads vary greatly.

the motorbike and tractor comparison should give you the answers you need. take the motorbike engine its cubic capacity is smaller than the tractors, its piston area smaller/ shorter stroke to make this engine produce its power it has to rev hard. its torque curve is very small and has to be kept spinning for maximum output obviusly gained by the bikes gearing high output + high revs. something light like a motorcycle crankshaft at high revolutions doesnt provide masses of torque.A tractor engine obviously has a greater cubic capacity and heavier components driven by its four stroke cycle iumagine the force generated at the crankshaft/flywheel at each firing stroke of every piston. obviously a small cubic capacity 3 cylinder tractor engine with lighter components will not generate masses of torque, a four cylinder turb charged engine creates its torque through turbo boost pressure effectively increasing the engines cubic capacity providing the turbocharger is kept spinning to provide that boost as soon as the engine load is dragged down to a certain point the turbocharger loses its effectiveness and the engine dies. this is remedied in modern tractors with splitters and powershift stages. it took a good tractor driver to keep earlier turbocharged tractors working to maximum capacity under load. A big cylinder engine has big capacity,heavier components often longer stroke than fours and lower r.p.m.s and will often slog down harder, all turbo charged/intercooled engines have optimum range giving max H.P./Torque. tractor manufacturers often use different capacity engines to provide a range of horsepowers and torque characteristics. Massey Ferguson for example 165 used 207 cu.in engine then later 212 cu.in engine different horsepower/different torque another example mf 168 used 236 cu in and mf 188 used 248 cu.in engine. the cubic in capacity,weight of components,stroke length and governed speed all important elements in engine performance.

i knew it was something like that! cheers mate

the uh amazone sprayer was described as a spreader by many incl uh themselves when it was launched somehow a misunderstanding in translation i think!.

is there really another version then because earlier posts were regarded as a joke which seems odd

brought them to keep ahead of the new mystery version!!!!!!

buy 13 in one go you might stand a slim chance of getting one decent one out of the batch with out faults

if he did i bet they had some good times nice and slow- no chance of a quickie

just a weight block only change?

any pics?what are the differences please

never mind putting net curtains up! give the nosey buggers something to watch that will either cure them of being nosey and give them something to talk about or you wont need net curtains but outside shutters and inside blinds he he

laughing again and extremely confused now i reckon could be a tortoise again chuckle with a mild liking for tractors

hope no serious damage occurred to that gate? theres a recession on you know dont want to have to pay for that- take it out of his house keeping and treat yourself .

cant stop laughing i guess must be a sly old then and not atortoise after all

i reckon i could be a tortoise because i could sleep for 4 out of 5 days, but then again could be a sly dog because only time i send out into the garden i am in the doghouse