waremark wrote:sussex2 wrote:waremark wrote:Drive train in a straight line?? Don't understand that last line.
It is to engage a gear with the engine under power - matched revs which put less strain on the mechanics and waste less energy. It is not always possible but generally preferable.
So most of us would use the terminology 'Rev-matched block gear changes'. And most of us use them, changing gear directly from wherever we are in the gearbox to whichever gear has now become most appropriate - in some cases 1st to 6th, as I think you suggest.
Sorry, but I'm still confused by this bit: "It is to engage a gear with the engine under power - matched revs...."
This might seem pedantic, (and/or wrong), but you can only engage a gear when there is no load on it, i.e. the clutch is disengaged. In that case the engine can not be under power, i.e. throttle being applied, otherwise the engine speed would rise and there would be no rev matching.
This is from PH a few days ago:
whiteside67 said:
"Say I am going up a hill in 5th gear and need to change down to 4th for acceleration e.g. to overtake. My foot is already half way down on the accelator pedal. When i press clutch to change down does this not cause clutch wear beacause my foot is a good bit down on the accelerator (quite high revs going through clutch)
Yes, if you dip the clutch at half throttle, the revs will go up and almost certainly by too much for your rev match anyway. So I think you'd reduce the throttle before pressing the clutch (blending the two I guess) to avoid both problems."
BertBert replied:
"As I am carp at rev matching, I use a blip anyway, so I do let the revs drop. I find it easier to blip the throttle and find a good clutch engagement point rather than try to find the right revs and hold them there."
I agree with Bert, having realised that I do the same. It may be unusual but I find it works well.
Best wishes all,
Dave.