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Old 06-13-2011, 01:43 PM   #31 (permalink)
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Again, it depends on the car and the gearing. Some have a tall first, some have a short first. My 2nd gear is only slightly taller than a 1st gen Insight's first.

I have 186,000 miles and my clutch is just fine. Basjoos took his Civic's clutch past 500k when it was replaced along with the engine.

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Old 06-13-2011, 02:19 PM   #32 (permalink)
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It depends how much of a "stop" you came to also

Being able to change a clutch *should* be within the scope of most modders skill sets, parts wise it is maybe $60, but it is still annoying.

There should not be a noticeable amount of clutch wear shifting gears, or even when bump starting. The majority of wear is when you get your heavy car rolling (assuming you are not pretending to be Don Garlits)

But using all the gears means you can better approximate bsfc peak conditions for longer, so with the exception of skipping first under the right conditions, I wouldn't skip gears (unless you have a REALLY close ratio trans).
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Old 06-13-2011, 02:28 PM   #33 (permalink)
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Clutches - It depends on the car. Clutches for some cars are very spendy - I was hit for £800 for my TDI although that was an uprated one including a new SMF flywheel with a view to performance improvements (not done, but at least it won't wear out ). That was for parts alone, and a standard one including the DMF is not much less.

DMFs are not always replaced but sometimes they are on the basis of "whilst we have it in pieces may as well do that as well" - like renewing the TDI water pump when doing a belt change. Some minicabs (Taxis using normal cars) local to me have them replaced when new with SMFs.

On the other hand the clutch for a Toyota Aygo costs only around £170 fitted. I'd be tempted to track day or stage rally one every weekend at that price
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Old 06-13-2011, 03:08 PM   #34 (permalink)
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Yah, I'm going with smf on the tdi golf when I get to it. Since my DMF failed I am not a fan of DMF, and since I don't idle very much it shouldn't matter much if I go lighter. I put simple,affordable,durable and efficient ahead of smooth personally.

It will be a couple hundred $ to convert (still less than a new DMF+etc), and a clutch disk after that will be $22?!?

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Old 06-13-2011, 05:25 PM   #35 (permalink)
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Quote:
Originally Posted by dcb View Post
But using all the gears means you can better approximate bsfc peak conditions for longer, so with the exception of skipping first under the right conditions, I wouldn't skip gears (unless you have a REALLY close ratio trans).
I totally agree.
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Old 06-14-2011, 03:26 AM   #36 (permalink)
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Quote:
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Yah, I'm going with smf on the tdi golf when I get to it. ...
Off Topic :

Mine was spendy due to being uprated too - I was aiming for ~180hp - in something smaller than a new Fiesta .

If you do swap make sure you get the 5/6sp one depending on your gearbox (I think you converted some time back ?) otherwise you get the rattle - like mine does - which I have learned to live with


On Topic :

I don't think there is an issue missing gears in terms of clutch wear, its the speed difference between the input and output sides and how long it slips which causes wear. In some cars you could hold say 2nd a little longer and then slip into 4th for cruising - that way you spend less time accelerating without lengthening the time of clutch slip and the speed difference is still quite low.

But this would need measuring car by car to see if it gained an advantage.
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Old 06-14-2011, 07:14 AM   #37 (permalink)
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Quote:
Originally Posted by PaleMelanesian View Post
I have 186,000 miles and my clutch is just fine. Basjoos took his Civic's clutch past 500k when it was replaced along with the engine.
The clutch was replaced not because it had worn out (it still had about 1/4 of its lining left), but because the engine and the 5th gear of the transmission had worn out, so I had the entire drivetrain replaced.
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Old 06-14-2011, 09:40 AM   #38 (permalink)
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That's what I was trying to say but it didn't quite come out right. Thanks.
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Old 06-14-2011, 01:18 PM   #39 (permalink)
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Quote:
Originally Posted by PaleMelanesian View Post
I totally agree.
Maybe its my ratio/turbo, but I have tried may combinations and the most fuel efficent one is slow and steady. At least reading this helped me understand that.

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