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Discussion Starter #1
There has been some discussion about the effect of performance and gearing between the outgoing EP3 and incoming FN2. So I've dug out the excellent cartest software and put in a few cars.

Remember, this is theoretical.

Gearing for the 2.2 Diesel:

gear_22.gif


Gearing for the EP3:

gear_ep3.gif


Gearing for the FN2:

gear_fn2.gif


Optimum shift points for the EP3:

opt_ep3.gif


Optimum shift points for the FN2:

opt_fn2.gif



And finally a whole load of numbers for a collection of cars. See how the shorter gearing of the new car gives better in gear times, at the expense of outright acceleration.

compare.gif
 

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I like numbers! :D

especially the 50-90 ones... :D:D


Thank you (as ever!) Pottsy :D
 

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Civic Type R gearing

Those figures are interesting but what I don't understand is why Honda have not rectified the 6th gear ratio in the new Civic Type R.

The only real flaws in my ATR is that it isn't great on the motorway, for not only does it lack the option of cruise control, but its top gear is 19.5 mph per 1000 revs, so 70 mph is 3600 rpm.

Now, given that the Accord has 5 gears and the new Civic 6, I don't see why they didn't use the 6th gear as a cruising gear. From reviews it seems to be that the 6th is 20 mph per 1000 revs, more or less the same as the Accord.

Yes, I understand low gearing in 1st to 3rd, for acceleration, but I think it would make the Civic a great car for B roads AND motorways had the top gear been used as a cruising gear. My wife's jazz is 23 mph per 1000 revs in top and even that would have been a small improvement.

This may sound like a tiny moan, but it is an easy 'fix' to make and would certainly make the new Civic Type R a more useful motorway companion. (Yes, I appreciate the Type R philosophy is about Racing, not cruising, but still.)

That's my two penneth anyway....!
 

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Discussion Starter #4
ATR, it is as you say about 20 mph per 1000 rpm. Making it any taller would be good for economy and noise, but you would get less acceleration making motorway driving much more tedious if you had to change down the whole time.

I specifically tested the car at typical motorway speeds to see what it's like, and in fact the sound insulation is very good and the engine silky smooth, so it didn't feel tiring or obtrusive at all.

HTH
 

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You think they would have stretched the 2nd gear ratio to allow it hit 60 without an extra shift into 3rd.
 

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Discussion Starter #7
You'd think so, just to get the figures on paper (actually it would need to be 62). But then the practicalities are not that simple, it's the same gearbox as the old car but with a different final drive - and it's possible that they chose this final drive ratio as being the one out of a limited number that gave the best driving experience.
 

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You'd think so, just to get the figures on paper (actually it would need to be 62). But then the practicalities are not that simple, it's the same gearbox as the old car but with a different final drive - and it's possible that they chose this final drive ratio as being the one out of a limited number that gave the best driving experience.
Hmm, same gearbox and same engine (more or less) in the Civic Type R, so I wonder where Honda's money has been spent?

And why the entry model now costs £17,600!
 

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I'm new here and also not from england or somewhere near so please don't kill me if I write something stupid...:D

Where could I see what gear ratios FN2 has? I've been looking all over web and couldn't find them...so mysterious :p


Thanks in advance [smilie=cheeky-grin:
 

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Honda Had to make some gearing changes to be able to give the new type r a wider V-tec range....on the down side more gear changes !
 
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