Wavetrac LSD Group Buy (all models) - Closes 24/12/20

We are an independent garage specialising in the servicing, repair and performance improvements on European cars. Specifically for the 'Baby BMWs' we offer manufacturer scheduled servicing, specialist repairs and performance upgrades including bolt-ons from all major brands, custom ECU software and are stockists of Wavetrac Differentials.

Moderators: Regal Autosport, babybmwadmin, Producethis, marco_polo, Lambster, Rich196

Slooby
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Re: Wavetrac LSD Group Buy (all models) - Closes 24/12/20

Post by Slooby »

Curious, both the TS and LCA to subframe bolts are M12 grade 10.9 bolts torqued to 74lbft +90 degrees doesn't exactly sound to me sufficiently close to stretching a bolt to the point of no return....
2016 M140i 5 door Manual
2013 Triumph Street Triple R
1988 T25 1.6JX TD Camper
Projects: 1973 SIII 109" 2 1/4 Diesel, 1965 SIIA 88" 300Tdi Hybrid, 1968 MkII Mini 1000
Gone but not forgotten: E39 M5, 1998 Impreza 500 of each toy
M-U-NAS
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Location: Bedfordshire

Re: Wavetrac LSD Group Buy (all models) - Closes 24/12/20

Post by M-U-NAS »

Interesting, so maybe not such a bad thing if they are reused, I guess still better to replace them given the low cost.
2018 BMW M140i SE MG, Wavetrac LSD, M4 LCA + TS
Bilstein B12 kit, Evolve Stg 1, xHP Stg 3, CSF Charge Cooler
MP Exhaust + BCS Midpipe, Powerflex Inserts, Underbody Brace, Maxton Splitter & Side Skirts, Reiger Diffuser
Slooby
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Re: Wavetrac LSD Group Buy (all models) - Closes 24/12/20

Post by Slooby »

Well I've now disappeared down a rabbit hole of hard sums, proof loads, yield strength, coefficients of friction for dry and lubed threads, published papers on torque-angle tightening etc etc :lol: :lol: :lol:

Suffice to say if you were to tighten a grade 10.9 zinc plated M12 x 1.5 bolt, dry, to 157Nm you would be at 100% proof load. Without using force gauge on the bolt proof load is assumed to be between 85 and 95% of the yield strength of that bolt. I am now trying to work out what a 90° angle adds in force to the bolt above the 'Snug Torque' of 100Nm (74lbft) to see if it goes above 90% proof which is considered the 'safe' margin in a stretch type application
2016 M140i 5 door Manual
2013 Triumph Street Triple R
1988 T25 1.6JX TD Camper
Projects: 1973 SIII 109" 2 1/4 Diesel, 1965 SIIA 88" 300Tdi Hybrid, 1968 MkII Mini 1000
Gone but not forgotten: E39 M5, 1998 Impreza 500 of each toy
JJ_140i
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Joined: Fri Aug 24, 2018 9:45 pm

Re: Wavetrac LSD Group Buy (all models) - Closes 24/12/20

Post by JJ_140i »

Evening all.

Did this group buy go ahead in the end?


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M-U-NAS
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Location: Bedfordshire

Re: Wavetrac LSD Group Buy (all models) - Closes 24/12/20

Post by M-U-NAS »

Yep it sure did, haven’t looked back since. Very worthwhile upgrade imo :)
2018 BMW M140i SE MG, Wavetrac LSD, M4 LCA + TS
Bilstein B12 kit, Evolve Stg 1, xHP Stg 3, CSF Charge Cooler
MP Exhaust + BCS Midpipe, Powerflex Inserts, Underbody Brace, Maxton Splitter & Side Skirts, Reiger Diffuser
JJ_140i
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Joined: Fri Aug 24, 2018 9:45 pm

Re: Wavetrac LSD Group Buy (all models) - Closes 24/12/20

Post by JJ_140i »

Bugger! Glad you got yours sorted!

Any talk of another group buy?


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M-U-NAS
Knowledgeable Member
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Posts: 190
Joined: Fri Mar 01, 2019 8:02 am
Location: Bedfordshire

Re: Wavetrac LSD Group Buy (all models) - Closes 24/12/20

Post by M-U-NAS »

I spoke to Ash (Regal) at the time of getting mine done and he said they would willing to do further group buys providing there is enough interest.

Might be worth seeing how much people are interested and then put that proposal to Ash. With things in general looking a little more positive now and light at the end of the tunnel (hopefully) with regards to the pandemic, could be a good time to start a new group buy.
2018 BMW M140i SE MG, Wavetrac LSD, M4 LCA + TS
Bilstein B12 kit, Evolve Stg 1, xHP Stg 3, CSF Charge Cooler
MP Exhaust + BCS Midpipe, Powerflex Inserts, Underbody Brace, Maxton Splitter & Side Skirts, Reiger Diffuser
JJ_140i
Junior Member
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Posts: 7
Joined: Fri Aug 24, 2018 9:45 pm

Re: Wavetrac LSD Group Buy (all models) - Closes 24/12/20

Post by JJ_140i »

Cheers for the info mate.

I’ll drop him a message to confirm and then setup a new post to not highjack this one.
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