Comments on: The learning process http://www.minipix.co.uk/2009/06/the-learning-process/ All the best things come in small packages. Fri, 25 Jun 2010 11:49:53 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Dad http://www.minipix.co.uk/2009/06/the-learning-process/comment-page-1/#comment-42453 Dad Tue, 23 Jun 2009 10:40:30 +0000 http://www.minipix.co.uk/?p=684#comment-42453 "Rev matching" is what I have to do when driving a vintage bus with a "crash" gearbox. With no synchromesh, you have to dip the clutch twice, matching the engine revs to the transmission speed in between. That applies when changing up and down. Quite stressful when climbing a hill and changing up, due to the huge amount of inertia in a Gardner diesel engine. Some say that it goes from full revs to idling in just under a fortnight! “Rev matching” is what I have to do when driving a vintage bus with a “crash” gearbox. With no synchromesh, you have to dip the clutch twice, matching the engine revs to the transmission speed in between. That applies when changing up and down. Quite stressful when climbing a hill and changing up, due to the huge amount of inertia in a Gardner diesel engine. Some say that it goes from full revs to idling in just under a fortnight!

]]> By: Matthew http://www.minipix.co.uk/2009/06/the-learning-process/comment-page-1/#comment-42452 Matthew Tue, 23 Jun 2009 10:35:04 +0000 http://www.minipix.co.uk/?p=684#comment-42452 Your engine will be very different to mine, not least because they've been designed by different manufacturers, so you'll get very different characteristics in yours. If you've got a turbo then it's unlikely that the engine will be set up to have another peak further up the rev range, simply because it won't need it. Mine's naturally aspirated (i.e. no turbo), so the Zetec engine management system tries to compensate by providing different levels of power depending on what you're trying to do. But yes, not much use for it on the roads! Your engine will be very different to mine, not least because they’ve been designed by different manufacturers, so you’ll get very different characteristics in yours. If you’ve got a turbo then it’s unlikely that the engine will be set up to have another peak further up the rev range, simply because it won’t need it. Mine’s naturally aspirated (i.e. no turbo), so the Zetec engine management system tries to compensate by providing different levels of power depending on what you’re trying to do.

But yes, not much use for it on the roads!

]]> By: Phill http://www.minipix.co.uk/2009/06/the-learning-process/comment-page-1/#comment-42451 Phill Tue, 23 Jun 2009 10:08:10 +0000 http://www.minipix.co.uk/?p=684#comment-42451 I tried the heel and toe thing in my car (when the engine was turned off, of course). Virtually impossible to do - as in your car, the accelerator pedal is positioned well behind the brake pedal. But the number of times it would actually be useful for me are ... well, limited! Interesting about the sweet spot with acceleration. I've only found one on my car - about 2500-3000 rpm (the turbo kicks in about then, apparently) - don't think I get up to 5500 rpm very often so might be interesting to see what happens! :) I tried the heel and toe thing in my car (when the engine was turned off, of course). Virtually impossible to do – as in your car, the accelerator pedal is positioned well behind the brake pedal.

But the number of times it would actually be useful for me are … well, limited!

Interesting about the sweet spot with acceleration. I’ve only found one on my car – about 2500-3000 rpm (the turbo kicks in about then, apparently) – don’t think I get up to 5500 rpm very often so might be interesting to see what happens! :)

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