REYLAND Escort - Version 2 Rebuild Pics
- Thread starter Ish
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Ish said:This is one of the unique features on this escort
You can adjust the 4WD from the variable controller from 100% RWD to 50/50 4WD and anything in between.
As an example you could launch it in 4WD and then switch it back to RWD so you don't have the transmission loss of a 4WD so it should equal better times.
Ish said:The Reyland car has variable in car adjustable 4wd split from a rotary knob which is much better than the antiquated RS200 system BUT if Martin's calculations work out he will use his pectel ecu to control the 4wd so he will beable to 'map' the 4wd!!!
Unless he's magically disconnecting or bypassing the centre diff, it will still have 4wd transmission losses.
It'd basically just be a proportional centre diff with clutch packs allowing variance front to back. ECU integration isn't *that* difficult (on the scale of things) as you just use wheel speed sensors to identify wheel spin and then a driver to proportion front/rear torque bias.
*n
penski said:
i didn't say their wouldn't be transmission losses
but it won't have 4wd losses when running in rwdyou make it sound like it's something simple from your second paragraph when you have NO idea of the amount of work involved
Ish said:i didn't say their wouldn't be transmission losses
As I understand it, the majority of the increased transmission losses in a 4WD system occur from the centre diff.
Unless he is bypassing it (which would be a rather trick bit of kit in itself) then the centre diff would be working by biasing torque front/rear. Even if torque is all being sent rearwards, it is going through the CD. Ergo, it would still have almost-4WD-transmission-losses.
you make it sound like it's something simple from your second paragraph when you have NO idea of the amount of work involved
Boo frickedy hoo.
I provided a simple explaination of how a torque biasing centre diff would work. I didn't deny the work involved and I do know what would be involved, thanks. You can keep your rolleyes, peon.
It's like people who think that programmable ECUs, fuel injection or forced induction is some sort of magic voodoo-styling stuff. You're operating within the constraints of physics and electronics. Once you get your head around the theory, it's surprising what can be done.
*n
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Not only that but unless they're doing something special the front wheels will still be turning the front driveshafts, front diff and whatever the small front prop is called that runs from the front diff to the centre diff. All of these have friction, which equals drag, which equals 4WD transmission loss. 
playworker said:Not only that but unless they're doing something special the front wheels will still be turning the front driveshafts, front diff and whatever the small front prop is called that runs from the front diff to the centre diff. All of these have friction, which equals drag, which equals 4WD transmission loss.
As it is no longer part of the drivetrain as such (being seperated thanks to a clutchpack or similar), it doesn't give transmission loss as such but it does create an increase in mechanical drag.
*n
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penski said:As it is no longer part of the drivetrain as such (being seperated thanks to a clutchpack or similar), it doesn't give transmission loss as such but it does create an increase in mechanical drag.
*n
Meh, it's still a disadvantage of the 4WD drivetrain though and unless they've got a mechanical bypass at the hubs themselves then there's naff all they can do about it. 4WD is for girls anyway
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Ish, will you kiss Martin on the bottom for me please ? I love him.
I wish I had the loot spare to pop down and say I want a silly car please. He never ceases to amaze me.
I wish I had the loot spare to pop down and say I want a silly car please. He never ceases to amaze me.
playworker said:Not only that but unless they're doing something special the front wheels will still be turning the front driveshafts, front diff and whatever the small front prop is called that runs from the front diff to the centre diff. All of these have friction, which equals drag, which equals 4WD transmission loss.
even if its 50% drag its close to FA on maybe 1hp
