Bit of an update & put the pics back up from the start of the thread that i moved in photobucket & they disappeared here!!
I seen a link to thread come up in another thread here about diffs so i thought i should set the record straight about my Borgy experience so far.
This is what happened to my BW78 awhile back after i got a bit of (but not enough!!!) traction at the drags.
I shortened the diff myself in the shed about 10 years ago
This failure i believe had nothing to do with the Borgy strength as such, as many have said & i have seen these diffs do sub 10 sec passes with alot more power than i have.
After cutting the tubes to length, the cut is in the middle of the lower control arm mount, i fitted a sleeve inside & did small alternate welds from side to side etc so as not to generate to much heat i one spot. No jig for the tubes was used just slow patient welding although i did have some aluminium channel bolted on either end to measure across the diff to check for warpage then bolt on again at 90 degrees to remeasure
The result was absolutely brilliant i must admit as the finished axles slipped in perfectly (big pat on the back & have another beer!)
Then came the mounts, i did alot of short welds again but it ended up pulling 1 of the tubes 1-2mm!! Bloody pissed off to say the least
The issue of the failure i believe was with how i straightened the housing.
Not the easiest or best way to do it but it was a bit to big to take to work on the quiet so more beer & head scratching & i did this!
You can see the circled section where i heated it with the oxy then jacked the crap out of it. It took many goes to get it right but it got it.
This is also the side that broke the plug welds & twisted the tube.
I now have a VS diff shortened by Final Drive (thanks Phil) & the mounts are welded the same as my old 1 ie.. standard top mount welded to the tube & center. If i ever have to do another housing (god forbid) i will fabricate the mounts myself as i hated having to cut up good housing just for mounts.
A BW78 is still my preferred choice as a conversion cose of unsprung weight compared to average 9", cheap & readily available.
They would handle a shit hot red motor without any drama's ( but you can break anything if you try hard enough)
Leave the Bango's & toothpick axles for social Sunday drives, good condition spares will run out one day!
. Motor now has 403rwhp 
( & had developed a bad miss all the way down the strip???? :confused: ) next run was 11.6 @ 122mph 
After they pushed me back i found the rear uni straps on the diff (have yoke not flange set up) had let go, then i notice the diff was leaking oil. Looked a bit closer to find i had twisted the diff tube in the center!! 
View Garage
