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  #16  
Old 17-07-2017, 11:01 PM
franky franky is online now
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1st to 2nd 2991 33
2nd to 3rd 2186 58
3rd to 4th 1648 85
4th to 5th 1687 111
5th top speed 146

Thats assuming 205/60/14
4.44 diff
7000rpm

3400rpm at 70mph

http://www.ebay.co.uk/itm/Subaru-Imp...cAAOSwkttZYLLl

a 3.9 saves you 400rpm as a rule of thumb.

http://www.ebay.co.uk/itm/Subaru-r18...kAAOSwgv5ZVPBO

Last edited by franky; 17-07-2017 at 11:07 PM..
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  #17  
Old 17-07-2017, 11:08 PM
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jonbills jonbills is online now
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John, why does only one wheel spinup in the burn out with the Quaife? Is it effectively same as wheel in the air?
I was going to get a Quaife to fix that very problem 😡
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  #18  
Old 17-07-2017, 11:12 PM
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SeanDezart SeanDezart is offline
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Quote:
Originally Posted by franky View Post
1st to 2nd 2991 33
2nd to 3rd 2186 58
3rd to 4th 1648 85
4th to 5th 1687 111
5th top speed 146

Thats assuming 205/60/14
4.44 diff
7000rpm

3400rpm at 70mph
1st to 2nd 2991 42
2nd to 3rd 2186 74 (quicker to 60 as I won't be changing gears)
3rd to 4th 1648 107
4th to 5th 1134 140
5th top speed 168

Thats assuming 225/50/15
3.54 diff
7000rpm

3000rpm at 70mph / 125mph at 5500

or something in between using one of my R200 3.9s :

1st to 2nd 2991 38
2nd to 3rd 2186 67 (quicker to 60 as I won't be changing gears)
3rd to 4th 1648 97
4th to 5th 1134 127
5th top speed 152

Thats assuming 225/50/15
3.90 diff
7000rpm

3250rpm at 70mph / 125mph at 6000rpm
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Sean Dézart
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  #19  
Old 17-07-2017, 11:21 PM
franky franky is online now
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sean you know thats a token value of 7000rpm. Given another few hundred rpm and it'll be 60.

Its missing the point though for me, It gives great thrust and the chance to have a nice mix of ratios/thrust for spirited sunday drives.

Glad to see you kept the excel I sent
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  #20  
Old 17-07-2017, 11:27 PM
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SeanDezart SeanDezart is offline
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I have it saved in several formats thanks....and I'm counting on my ol' stroker to give me all the trust I need and besides, our roads are more open and we're more likely to drive longer distances hence Efi and a long ratio on 15" wheels.
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Sean Dézart
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  #21  
Old 17-07-2017, 11:52 PM
franky franky is online now
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I'm only having a tiddly engine.... is quite happen my swap our land mass for yours
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  #22  
Old 18-07-2017, 12:35 AM
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SeanDezart SeanDezart is offline
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You'd be very welcome near me in the bocage - we have cute sinewy roads too.
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Sean Dézart
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  #23  
Old 18-07-2017, 09:18 AM
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johnymd johnymd is online now
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Interesting numbers. Swapping diff ratio's doesn't make quit the difference I had imagined.
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  #24  
Old 18-07-2017, 09:49 AM
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SeanDezart SeanDezart is offline
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Quote:
Originally Posted by johnymd View Post
Interesting numbers. Swapping diff ratio's doesn't make quit the difference I had imagined.
Exactly and I'd prefer to have a peacefull cruising engine speed in 5th which is to all intents and purposes an overdrive way out there (on my right) and drive spiritedly with the 'real 4 !

I feel Franky will revert to a longer ratio-ed diff in time....once he's got it out of himself.
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Sean Dézart
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  #25  
Old 18-07-2017, 10:29 AM
franky franky is online now
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In a perfect world I'd have a 4.11
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  #26  
Old 18-07-2017, 10:55 AM
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Fellas, please educate me - what are these telephone numbers you are quoting?
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  #27  
Old 18-07-2017, 10:56 AM
Nigel Brook Nigel Brook is offline
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Having had personal experience of the plate lsd I can vouch for the noiseness when hot. As for the understeer this can be dialled out according to your preference.
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  #28  
Old 18-07-2017, 11:06 AM
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moggy240 moggy240 is offline
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Quote:
Originally Posted by jonbills View Post
Is it the same modified stub axles that are needed for the r200 short nose diff?
As far as I am aware the modified stub axles will only fit the Subaru R180 ,I got mine via HybridZ a few years ago but sounds like Sean has some.
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  #29  
Old 18-07-2017, 11:52 AM
Moriarty Moriarty is offline
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Quote:
Cons of an ATM - not homologated for 'serious' racing.
No but there are "serious" racers using ATB's in a large number of formula series.

For shopping trip warriors a viscous is usable but starts to lose active ability once it gets hot.

Quote:
I don't like the fact that only one wheel spins during a burnout at the drag strip so I only get one sticky tyre
Odd, my car leaves dual tyre marks on a spin up

Quote:
Having had personal experience of the plate lsd I can vouch for the noiseness when hot. As for the understeer this can be dialled out according to your preference.
yes it can you're right but when you're driving many different tracks then you're constantly tweaking


Quote:
The plate diff seams to be the preferred choice for those that are experienced enough and have the ability to know exactly how to set the diff for their specific use and be happy enough to keep taking it apart for adjustments.
which involves shimming with expensive and sometimes difficult to get clutch and dog plates
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  #30  
Old 18-07-2017, 01:38 PM
franky franky is online now
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Quote:
Originally Posted by smileyinside View Post
Fellas, please educate me - what are these telephone numbers you are quoting?
Its the diff final drive, expressed as a ratio.
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