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Author Topic: Top speed in reverse.......!!!!! MV6 2.6 auto  (Read 2248 times)

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webby23

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Top speed in reverse.......!!!!! MV6 2.6 auto
« on: 10 November 2009, 16:51:36 »
During my normal journey to work, I have to reverse about 30 yards into a space and would I be right in thinking that my car, at full whack in REVERSE, would probably be doing about 35mph.....????

It seems to have very lengthy gearing in reverse and I reckon it would easily get up to them sort of speeds....

Anyone been mental enough to test it.....????

 :D :D :D :D :y :y

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Brick Tamland

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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #1 on: 10 November 2009, 16:53:25 »
Now you've got me thinking ::) But I wont be happy if something goes bang ;D
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Darth Loo-knee

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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #2 on: 10 November 2009, 16:53:58 »
I can think of Two People who will have done it....
Hotel21 & Jim  both happen to be Mad Scotsmen ;)
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waspy

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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #3 on: 10 November 2009, 17:07:08 »
Isn't reverse the same as first, but reversed :D
Max it in first & see what the speed is ;)
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Ghost

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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #4 on: 10 November 2009, 17:45:42 »
I used to have an opel kadett E Gsi 2,0 with digi cockpit.
it showed the speed even if you were going backwards the best I had was 56 Kmh what is roughly 35mph only done it once though.
Who said that its only the scots that are mad, we geordies are 2 [smiley=evil.gif] [smiley=evil.gif] [smiley=evil.gif]
« Last Edit: 10 November 2009, 17:46:10 by acdcdave »
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Andy B

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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #5 on: 10 November 2009, 18:19:34 »
Quote
Isn't reverse the same as first, but reversed :D .....

Not normally
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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #6 on: 10 November 2009, 18:24:42 »
Only a fork lift truck driver could do 35 MPH in reverse and stay in control!  :)

If you are keen (or sad) enough it would be easy enough, (and much safer) to calculate the maximum reverse speed.

NN
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hotel21

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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #7 on: 10 November 2009, 18:39:55 »
Its lots of fun going backwards!  Then rapidly going forwards again!  Ask TB.  He enjoyed his lesson or six....   ;D
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GastronomicKleptomaniac

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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #8 on: 10 November 2009, 18:41:37 »
Ex-copper I know reckons the 3.0 police cars would do about 70mph in reverse, care to comment, H21? :y
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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #9 on: 10 November 2009, 18:41:38 »
Quote
Its lots of fun going backwards!  Then rapidly going forwards again!  Ask TB.  He enjoyed his lesson or six....   ;D

More cops doing J-turns!  ;D ;D ;D

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hotel21

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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #10 on: 10 November 2009, 18:48:43 »
Quote
Ex-copper I know reckons the 3.0 police cars would do about 70mph in reverse, care to comment, H21? :y

What they read and what they do acrosws the ground are two seperate things.

They can go quite quickly though.....   :P
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hotel21

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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #11 on: 10 November 2009, 18:49:36 »
Quote
Quote
Its lots of fun going backwards!  Then rapidly going forwards again!  Ask TB.  He enjoyed his lesson or six....   ;D

More cops doing J-turns!  ;D ;D ;D


J turns, Y turns, handbrake turns, smee escapes etc etc etc....  All part of the fun and games of SED training.  ;)
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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #12 on: 10 November 2009, 18:50:40 »
Quote
Quote
Quote
Its lots of fun going backwards!  Then rapidly going forwards again!  Ask TB.  He enjoyed his lesson or six....   ;D

More cops doing J-turns!  ;D ;D ;D


J turns, Y turns, handbrake turns, smee escapes etc etc etc....  All part of the fun and games of SED training.  ;)

lol, cant wait to do my blue light course :y
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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #13 on: 10 November 2009, 19:12:36 »
Quote
Its lots of fun going backwards!  Then rapidly going forwards again!  Ask TB.  He enjoyed his lesson or six....   ;D
Thats Libelous Mr H21.....



....only it's true  :D



Oddly enough, I haven't had the opportunity to hone those skills - but I did have to slap 4 new tyres one  ::)
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waspy

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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #14 on: 10 November 2009, 19:24:59 »
Quote
Quote
Isn't reverse the same as first, but reversed :D .....

Not normally

I don't know the ins & outs of an Auto, but i was told that in a manual the reverse gear is just first reversed. That was by a gearbox specialist some years back. I don't know so i'm going on what i was  told. I'm not an expert ;)
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Kevin Wood

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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #15 on: 10 November 2009, 20:16:06 »
If you really want some fun, get a bike engined kit car with a separate reverse box. 6 speed sequential in reverse with a 13k RPM red line, any one?  ::)

Not so easy to snick it back into a forward gear in the middle of a J turn though. So I'm told.

Kevin
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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #16 on: 10 November 2009, 22:44:21 »

[media]http://www.youtube.com/watch?v=ONhxsY4wMIg[/media]
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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #17 on: 10 November 2009, 23:12:31 »
Looks exactly the same sort of thing TB & Hotel21 were doing.. oh and not forgetting poor Jura  ;D ;D ;D
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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #18 on: 10 November 2009, 23:12:55 »
TYPE
      CLUTCH

DIAMETER
                               GEAR RATIOS                                                                  FINAL DRIVE RATIOS

 
                                1              2                3               4             5               Rev.
Manual       240 mm       3.81:1       2.11:1       1.34:1       1.00:1       0.81:1      3.40:1      3.70:1
Automatic       -               2.40:1       1.48:1       1.00:1       0.72:1       -                2.00:1       3.90:1
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Mr Skrunts

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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #19 on: 10 November 2009, 23:16:00 »
Automatic      -              2.40:1      1.48:1      1.00:1      0.72:1      -               2.00:1      3.90:1


All these ratios are for the 3.0

So looking at the auto, what ever speed you could achive in 1st it looks like reverse is 20%ish slower.
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Kevin Wood

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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #20 on: 10 November 2009, 23:24:27 »
Quote
Automatic      -              2.40:1      1.48:1      1.00:1      0.72:1      -               2.00:1      3.90:1


All these ratios are for the 3.0

So looking at the auto, what ever speed you could achive in 1st it looks like reverse is 20%ish slower.

Other way round. Reverse is higher geared than first. ;)

Kevin
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Mr Skrunts

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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #21 on: 10 November 2009, 23:32:27 »
Quote
Quote
Automatic      -              2.40:1      1.48:1      1.00:1      0.72:1      -               2.00:1      3.90:1


All these ratios are for the 3.0

So looking at the auto, what ever speed you could achive in 1st it looks like reverse is 20%ish slower.

Other way round. Reverse is higher geared than first. ;)    :y :y
 
Kevin


So how fast is a 3.0 auto in 1st gear. ?
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Re: Top speed in reverse.......!!!!! MV6 2.6 auto
« Reply #22 on: 11 November 2009, 09:38:48 »
Quote
So how fast is a 3.0 auto in 1st gear. ?

I don't normally look, but say 6.5K rpm upshift point divided by 2.40 and then 3.90 gives you 694 RPM at the wheel.

A 235/45/17 does 796 revolutions per mile so to get MPH: (694/796)*60 = 52 MPH.  :o

In practice, it would depend what the torque converter is doing, although at those engine speeds it should be pretty much solid.

Kevin
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