The Disco with the low RPM was labouring the engine, this will always make a vehicle use more fuel, especially heavy 4WDs.
Baz.
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The Disco with the low RPM was labouring the engine, this will always make a vehicle use more fuel, especially heavy 4WDs.
Baz.
Yeah... we know that 100 will use less than 110... but is there a point gearing and efficiency are more important than wind speed... ie where say a constant 70 will use less than a constant 60.
I know I haven't got the patience to work it out, but it has puzzled me in the past :)
In this case most probably :) wat speed is 1750rpm in 4th on a disco anyways??Quote:
Originally Posted by Redback
should be just over 60kph. (61.5)
:)
oops, i have not read every post however this was an interest test that my mate did towing his caravan with a 100 series 'turboed manual gearbox' from brisbane to melbourne
he ended driving all the way in 4th gear at or around 90-95km/h
he said the differance between holding the same speed in 4th as to fifth gear was big, in fifth gear the accelerator was pushed more and the egt's were higher but rpm was lower than when in 4th
he returned his best fuel economy driving in 4th at higher rpm but cooler egt's
i tried the same with my 300tdi....i just could not let my little motor spin at higher rpm's for extended periods, i guess its lack of a few cubes or fourth gear gearing
either way i still pull better fuel economy than him be it that i'm a little slower up the hills
No idea, but 1750rpm in a V8 is way below the torque curve, don't V8s idle at 1000rpm there abouts, even a 300TDi would be below the torque curve, wouldn't it ??Quote:
Originally Posted by Grimace
Baz.
nope the curve for most rover engines is either well and truely underway by those revs and 600-700 is normal idle (or thereabouts) with the aircon off for most of them, a series 2.25 petrol can be made to idle at a shade over 350 rpm, you can almost make out individual cylinder firings at that speed.
Ive just read this thread from start to here (this point) whilst drinking a nice 16 year old Lagavulin (see whisky thread). I realise it's a bit early in the day over here in WA, but you should have had the day I've just had! :D
Anyway, I've come to a few conclusions:
1) Blknight deserves a bloody medal for his patience and excellent responses. No disrespect to the others who have tried their best here to speak sense to the guy with the question, but after 10 pages or so they stand out to me.
2) PhilipA hit the nail on the head, 'cos it's the wind resistance that really comes into it here with the squared effect, etc.
and 3) Surely this is a TROLL ??? Every response from the guy who asked the question has been inflammatory in one way or another. Is it just me? I've been around online car forums since they first started and this is classic TROLL behavior.
Just my thoughts anyway... :o Pour me another one.
Jon