GaryM
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| posted on 30/12/22 at 09:27 AM |
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English Axle diff upgrade
Hi Guys
Happy New Year to you all!
Since discovering the delights of Autosolos I’m thinking of changing the diff in my English axle Locost to an LSD type unit.
I quite like the look of the Quiaffe ATB from Burton Power.
How practical is it for me to swap the current diff for the ATB unit myself or will I need to take it to a specialist to do it for me?
If it’s the later can anyone recommend someone that will do this in the Reading/Berks area?
Thanks
Gary
[Edited on 30/12/22 by GaryM]
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roadrunner
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| posted on 30/12/22 at 01:29 PM |
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I'm also interested in this mod.
Burton Power have a LSD for the Sierra 7"diff at just over £600.
Was wondering how this would work as I have the 3.14 diff.
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johnemms
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| posted on 31/12/22 at 09:54 AM |
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Blackline Atlas Helical Lsd ..
Regular diff oil..
No complaints..
Fitted it mid season - changed the car dramatically - spun it at least 3 times..
Following year April back on the road - adjusted to its new temperament 
Fitted it myself - locost - I would advise using a skilled fitter if you want 100% reliable job 
[Edited on 31/12/22 by johnemms]
Own chassis & Build - First time pass!!
"7's" aren't really "cars", they are 'experiences"
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roadrunner
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| posted on 31/12/22 at 10:02 AM |
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Sounds great.
My handling has never been good.
Rear wheels are 7mm and 5mm toe in. Shimming it out this winter.
If I spin it up on a bend it's difficult to catch perfectly and I believe an LSD would fix this.
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johnemms
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| posted on 31/12/22 at 10:39 AM |
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Standard diff meant i could plant the throtle on a bend and one wheel would loose traction and the car would slow down untill it regained
traction..Which was nice and safe...
After fitting The Blackline LSD that didn't happen anymore - if I plant the throttle the extra power on cornering was very noticeable and
catapulted you up the road :p but you needed to update your skills not to spin out..
I wouldn't go back to standard now though .. lol
Own chassis & Build - First time pass!!
"7's" aren't really "cars", they are 'experiences"
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roadrunner
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| posted on 1/1/23 at 12:16 PM |
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Your standard diff sounds different to mine.
If I mashed the loud pedal mid corner both wheels would spin up and I would spiral into a field or tree. 
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MarcV
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| posted on 1/1/23 at 07:21 PM |
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That doesn't sound like a standard open diff. Did you check this?
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roadrunner
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| posted on 2/1/23 at 09:23 AM |
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No. But I have no confidence in the handling as it is very easy to lose the back end.
[Edited on 2/1/23 by roadrunner]
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JoelP
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| posted on 2/1/23 at 05:21 PM |
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Lsds are famed for that - you can apply a bit more power, but too much will cause it to spin, rather than just the inside wheel spinning up. My open
diff spins the inside wheel unless you are on a really slippy corner, in which case both will give up.
Beware! Bourettes is binfectious.
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roadrunner
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| posted on 2/1/23 at 07:36 PM |
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Is there a simple test to find out what I have.
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MarcV
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| posted on 8/1/23 at 07:47 PM |
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I didn't put in any answer yet as I am not sure about behavior of the different LSDs out there (viscous, plate, gear..)
But an open diff is probably the easiest and as you think that it is what you have, might be a good check anyway.
Jack up the rear, leave transmission in gear. Rotate one wheel and the other should counter-rotate without much effort required. That's an open
diff.
If anyone can chip in for different LSDs, that would help (me as well, general learning :-))
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