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Old Nov 8, 2005 | 09:58 PM
  #81  
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ian sibbert
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Joined: Jul 2004
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From: Lancaster, Lancs
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Originally Posted by Hooligan
Right, I had a Nissan Sunny GTI-R for about a month some 2 years ago...
It was supposed to be a group N rallycar but I guess with a proper group A shell, big AP brakes, Proflex group A suspension and a very illegal engine it was what we call a mini-group A car...
The engine was a full group a engine with silly cams, God knows what compression and a restrictor on the turbo.
It would FUCK OFF at an alarming rate untill you hit 5-5500 rpm and it's like hitting a brick wall The way it catapults out of corners from on 2000 rpm defies belief but you are forever changing gears...I used to love hammering it around town wich is fun as you have loads and loads of corners and jumps (some people refer to them as speedbumps) but it's thirst, constant need for fettling (the cams or followers needed some specific maintenance, can't remember) and the lack of top end killed it for me. On the motorway you'd be in top and topspeed in a second and next thing you know is you're droning away whilst every mondeo passes you...
Oh, and it broke several gearboxes and diffs, had a whole case full of them in the garage wich were destroyed by the previous owner!

So I would advise against it and recommend a nice 400-400 engine with shorter final drive for more resonsive feel (less laggy) and proper accelleration!

Oh dear...a sensible response to a post by Phil from me...what is the world coming to???
Just ask anyone that has a Subuaru RA or a Mitsi RS...all made for the Grp'n' rally market low geared and lightening off the line....as for the the standard front diff...the strengthening plate was a recognised grp'n' modification it stops expansion..... the major element you're fighting against is heat....ive seen standard diffs with additional oil capacity to aid heat control....the thick wall is usually combined in rally cars with the strengthening plate....all done to prevent expansion and diff failure....the gearbox and diff we run have built in oil pumps to enanble oil cooling.....if I were looking at improving the performance of any diff/gearbox the removal of heat would be something i'd look at early on.....size is important but when you look at the Japanese cousins they manage to transmit large amounts of power through quite small diffs...
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