Old Aug 17, 2013 | 10:28 AM
  #28  
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foreigneRS
Testing the future
 
Joined: Jul 2003
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From: W. Sussex
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Originally Posted by martysmartie
Yes, I seem to remember the 4x4 flywheel is lighter than the 2WD though, something like 7-8KG from memory, for the 4x4, this will improve the throttle response, but on the downside it looses you torque!
how does a lighter flywheel lose you torque?

Originally Posted by WTF?!
Regarding the L8 thing, well, 4wd TPS picks up every 1 degree throttle opening IIRC, but 2wd has, err, hardly any. Closed and open probably. lol.
the TPS is a linear resistance vs agle so if you apply a constant voltage to it, as you rotate it, the voltage across it changes linearly. that happens regardless of what measuring device you put on it (i.e. which ecu).

if the measuring device you put on is analogue, i.e. an old school voltmeter with swinging needle, then you can measure that voltage as finely as the scale on the device. if you had a meter that was a kilometer wide and had a marking every 1mm you could measure it in 1 million 'sections', i.e. every 0.000005V

if the measuring device has an 8 bit analogue to digital converter like an old ecu does, that voltage, say 0 to 5V, can be measured in 2 to the power of 8 'sections', i.e. 256 sections, or every 0.02V

a more modern ecu would probably have a 16 bit ADC and could measure that 5V in 65536 sections, i.e. every 0.00008V.

however, none of that would really matter if you only had a map in the ecu that had 2 break points in it at 0V and 5V.
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