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What Type Of Diff For Autograss?


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#1 bully

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Posted 07 January 2014 - 09:01 PM

not sure if this has been covered, but want to know other peoples thoughts (based on personnel experiences) as to which type of diff is best suited for autograss racing.

 

im using a sailsbury lsd and it under steers badly going round the bends (oval circuit)

but as the track is only three car width there is not much room for error

 

ive tried a x pin but the inside wheel just spins as soon as I start to turn in.

 

when going in fast and hard round the bend sometimes my inside wheels leave the ground (mainly the back but sometimes the front does)

 

I asked swiftune and they said the atb but I asked m.e.d and they said a plate type (there nxg)

 

the track conditions are a bumpy track made of clay, when the weather is dry and hot the track is like concrete but then they wet it  to keep the dust down  it turns into an ice ring, when it has been raining its a boggy mudbath.

 

I have to take three different types on tyres and predict what condition the tracks going to be like when its my turn.

 

the engine is an all out 1293 race engine with 85bhp at the wheels on sleafords dyno.



#2 summs116

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Posted 07 January 2014 - 10:44 PM

Engine in front or rear
Plated LSD diff fine but it's down to how tight the break off/ ramp angles plus it can be down to ur suspension set up

#3 bully

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Posted 08 January 2014 - 09:00 AM

Engine is in the front, tested the diff and it's at 61lbs

#4 DugganC17

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Posted 09 January 2014 - 09:56 PM

have you tryed asking the likes of endaf as when i looked in to building a class 4 i always kept coming back to his cars as they seemed to have so much grip and go out of the corners

 

Dan



#5 bully

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Posted 09 January 2014 - 10:23 PM

email sent so will see what he says



#6 mk1coopers

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Posted 10 January 2014 - 06:16 PM

In our old Metro grass track car the diff was welded up, a bugger to drive on Tarmac but it was good on the slippery stuff (we are talking a long while ago now so I'm sure there are better solutions out there)

#7 3ltrmini

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Posted 05 February 2014 - 03:37 PM

Hi just read your post and if its any help i used to race ovals on both dirt and tarmac with a mini very sucsessfully ,i ran a Salsbury lsd and the break off was set at 110 lbs feet this might sound a lot but when up on two wheels you wont loose drive and if you hit another car it will break off rather than break driveshafts..






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