Slow speed

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cornish rattler said:
Not saying i do or did but would be capable or doing 80 it was my dad with his 1964 2a with a perkins 4203 fitted back in the 80's where we just tried it and it went to 80, my 2a fitted with a tweaked 200 tdi will do 95 but i don't cruise at that speed i just did it to try it.
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80 kmh, maybe. I have had two Landrovers fitted with 4/203s. They do about 45 mph max on standard gearing.
You can get about 20% more by fitting a high ratio transfer box, or a Fairey overdrive.
I have also had several old Perkins 4 cylinder engines in tractors, and worked on various other Perkins in boats.
They are just not a high revving engine, they are not about revs and BHP, they are for applications demanding steady revs and good torque through the rev range.
 
Turboman said:
80 kmh, maybe. I have had two Landrovers fitted with 4/203s. They do about 45 mph max on standard gearing.
You can get about 20% more by fitting a high ratio transfer box, or a Fairey overdrive.
I have also had several old Perkins 4 cylinder engines in tractors, and worked on various other Perkins in boats.
They are just not a high revving engine, they are not about revs and BHP, they are for applications demanding steady revs and good torque through the rev range.
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Not sure what they do probably change the gearing in the FIP for road use.
 
Ok i don't know much about physics but the engine first got fitted to the 2a swb with the 2a swb speedo and when it went over 70 the needle on the speedo broke then a few years later the engine was fitted to an S3 lwb with 750's and the speedo that went to 90 and the landy maxed out at 80, both vehicles was fitted with std gearing.
When we first removed the engine from a 70' fork lift truck we fitted it in the 2a and would only max out at 45 my dad rang the diesel specialist that did the pump and injectors and said we just referbed it to the spec it came to us in which was commercial use and said they will set it to road use and it totally transformed the landy, ok in the swb it could have got to 70 / 75 and broke the neadle but in the lwb the engine maxed out at 80 and the speedo went to 90 and the speedo was factory fitted for the gearing on the landy so that all i can tell you.
 
cornish rattler said:
Not sure what they do probably change the gearing in the FIP for road use.
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They don't. Road engines, like Commer vans, have mechanically governed pumps. On thinking about it, they may rev a bit more, maybe about 3000 rpm. The industrial engines with hydraulic governor rev to about 2800.
You could turn up the max fuel, but that will make a lot of black smoke, and not much more power. Or, you could turn up the rev limiter, but that may damage your engine.

cornish rattler said:
Ok i don't know much about physics but the engine first got fitted to the 2a swb with the 2a swb speedo and when it went over 70 the needle on the speedo broke then a few years later the engine was fitted to an S3 lwb with 750's and the speedo that went to 90 and the landy maxed out at 80, both vehicles was fitted with std gearing.
When we first removed the engine from a 70' fork lift truck we fitted it in the 2a and would only max out at 45 my dad rang the diesel specialist that did the pump and injectors and said we just referbed it to the spec it came to us in which was commercial use and said they will set it to road use and it totally transformed the landy, ok in the swb it could have got to 70 / 75 and broke the neadle but in the lwb the engine maxed out at 80 and the speedo went to 90 and the speedo was factory fitted for the gearing on the landy so that all i can tell you.
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Series speedometers are rarely any guide to actual speed, and often just wobble about all over the place.
 
Turboman said:
They don't. Road engines, like Commer vans, have mechanically governed pumps. On thinking about it, they may rev a bit more, maybe about 3000 rpm. The industrial engines with hydraulic governor rev to about 2800.
You could turn up the max fuel, but that will make a lot of black smoke, and not much more power. Or, you could turn up the rev limiter, but that may damage your engine.



Series speedometers are rarely any guide to actual speed, and often just wobble about all over the place.
Click to expand...
Normally, I would agree with the comment on speedo but the speedo on my 1977 lwb station wagon seems to be accurate to within 5 mph at 60 compared to GPS.

Imagine how fast a 95mph land y could go if it wasn't as aerodynamic as a brick.

Col
 
cornish rattler said:
Ok i don't know much about physics but the engine first got fitted to the 2a swb with the 2a swb speedo and when it went over 70 the needle on the speedo broke then a few years later the engine was fitted to an S3 lwb with 750's and the speedo that went to 90 and the landy maxed out at 80, both vehicles was fitted with std gearing.
When we first removed the engine from a 70' fork lift truck we fitted it in the 2a and would only max out at 45 my dad rang the diesel specialist that did the pump and injectors and said we just referbed it to the spec it came to us in which was commercial use and said they will set it to road use and it totally transformed the landy, ok in the swb it could have got to 70 / 75 and broke the neadle but in the lwb the engine maxed out at 80 and the speedo went to 90 and the speedo was factory fitted for the gearing on the landy so that all i can tell you.
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I'm not saying your vehicle can't go the speeds you claim, it just won't do it with standard gearing and that engine. It isn't hard to fathom, the engine is directly linked to the wheels via the drivetrain. And if the engine can't spin fast enough to attain the speeds, then you were't doing them.
 
300bhp/ton said:
I'm not saying your vehicle can't go the speeds you claim, it just won't do it with standard gearing and that engine. It isn't hard to fathom, the engine is directly linked to the wheels via the drivetrain. And if the engine can't spin fast enough to attain the speeds, then you were't doing them.
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Piston return springs :rolleyes:
 
Colthebrummie said:
Normally, I would agree with the comment on speedo but the speedo on my 1977 lwb station wagon seems to be accurate to within 5 mph at 60 compared to GPS.

Imagine how fast a 95mph land y could go if it wasn't as aerodynamic as a brick.

Col
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Some are better than others, and most speedometers of that time were not very accurate. The wobbling needle can usually be cured by lubricating the cable, and making sure the drive unit on the gearbox is working properly.
The speedo on our petrol Series is quite accurate, but seems to stop at about 45. In fact, I think the vehicle will cruise at 50-55 mph, judging by other traffic, and time taken on known main road routes.

Like most of the other Series owners, I wouldn't want to go faster than about 55 mph. The brakes are not too bad, but the cornering at speed, and the drastic fuel economy at higher speeds would put me off.
My Perkins engined 109 was in fact a very usable vehicle. It was slow on long runs, but did about 30 mpg under all conditions. The load carrying and towing capability was excellent, and it was very good off road.
 
I don’t suppose I will ever understand the need to ‘improve speed’ on a series. Apart from the fact they are not designed to go fast from the floor up, what on earth attracts people to these old birds who want performance. The very fact they are what they are attracts most enthusiasts.
You can invent any excuse you like from motorway usability to keeping up with modern traffic but at the end of the day thats not what they are about.
They are a tractor you can pop to the post office in on a Tuesday. That’s what they were, and remain. Sticking a V8 in one and balloon tyres stops it being a series so why bother owning one. You may as well have a Geap Jeap Jeep :eek:
 
Bobsticle said:
I don’t suppose I will ever understand the need to ‘improve speed’ on a series. Apart from the fact they are not designed to go fast from the floor up, what on earth attracts people to these old birds who want performance. The very fact they are what they are attracts most enthusiasts.
You can invent any excuse you like from motorway usability to keeping up with modern traffic but at the end of the day thats not what they are about.
They are a tractor you can pop to the post office in on a Tuesday. That’s what they were, and remain. Sticking a V8 in one and balloon tyres stops it being a series so why bother owning one. You may as well have a Geap Jeap Jeep :eek:
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Land Rover themselves put V8's in... guess they must be wrong too :rolleyes:
 
Turboman said:
Only right at the end of Series production, when they were being slaughtered in the marketplace by Jap 4wds, and looking for cheap fixes without spending much money.
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I don't think the detuned RR engine, which didn't have a great deal of power to start with, actually gave the stage one any extra speed though, just more torque and a flat front
 
kermit_rr said:
I don't think the detuned RR engine, which didn't have a great deal of power to start with, actually gave the stage one any extra speed though, just more torque and a flat front
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I think that is right, they gave more extra torque than power. I don't know much about them. As far as I can remember, they were LWB, and meant to appeal to the military more than the civilian market.
I also seem to remember they were a bit of a stopgap, before the " all singing, all dancing", coil spring models known as One Tens, and shortly thereafter, Nineties, were ready for production.

Although I have owned both Series 3 and a Ninety, I myself feel that those models lost a lot of the nice features of the Series 2a, like simplicity, and all steel construction, without actually doing much more than a 2a.
Obviously, many will disagree, but that is their prerogative.
 
Hopefully my 2.25 petrol engine will go on for years but if it doesn't, I'd be looking for a 3.5 v8 to replace it. Not to go much faster but to get it up steep hills without any drama and cruising at 50 without it reving it's nuts off.

Col
 
kermit_rr said:
I don't think the detuned RR engine, which didn't have a great deal of power to start with, actually gave the stage one any extra speed though, just more torque and a flat front
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Weren’t they something like 90hp. A big step up from the optimistic 72hp of the 2 1/4.

As for going quickly. I put a 200Tdi in my 88. It was a huge riot to drive. Wonderful handling, would drift lovely on damp roads. You really could drive it on the throttle. I recall chasing a herd of Elises round the Elan Valley.

With 3.54 gears I clocked it at 89mph on the gps on a private road. Could have done with better brakes though.
 
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