Which crank hub upgrade?

[Dumaurier7]

Hi all! I’m at the point in my build where I’m looking to upgrade my crank hub to avoid any related issues caused by the extra power. I know of the two options presently available for the N55 (and S55) which are completely different in their design which leaves me to wonder of the two are better? Please post your experiences and opinions your help will be greatly appreciated, thanks.

 

[houtan]

Did you end up getting one?

 

[Dumaurier7]

I havn't purchased yet but I sorta settled on the Spline Lock because ive read and seen people saying that drilling of the crank is bad!? Personally I was leaning toward pinning the crank but due to conflicting information I am jut not sure.

 

[RuskiRacer]

Who has said its bad besides Tony turbo? O can see why he would be opposed to it

 

[Dumaurier7]

 

[Dumaurier7]

Has anyone thought of or tried welding the original hub and sprockets together?.......but wait! Welding won't stop the entire piece from spinning inside the crank if the bolt runs loose!

 

[RuskiRacer]

Lol I welded my stock one together inside the car and welded the friction disk. Welding the stock 3 piece hub can be done but then you need to balance the unit to an extent and then it still isn't pinned so it is still depending on soley of the torque of the bolt alone to hold it in

 

[Dumaurier7]

You're very quick on the draw!

 

[RuskiRacer]

Haha someone's gotta be , also meant to say I cracked the friction disk and welded one together

 

[RuskiRacer]

I did watch the video and I'm not necessarily opposed to the spline lock but I think of it as an extractor bit essentially. Eventually if you keep using that extractor bit on that stripped but you'll Eventually strip it all the way to where you spin the socket off the nut. The capture plates are useless I had a vtt capture plate didn't do anything. I like the idea of drilling the crank and using the pins not to only locate it but they do hold into the crank and prevent the hub from moving or spinning , I think of it more as having a brand new nut and socket and having the more precise fitment and being able to put more torque through it. There can be arguments made either way as to which is stronger or better . I haven't seen any evidence to support drilling 2 or 4 small holes in the front of the crank will recude the strength or cause weekspots in the crank. Not sure also who has managed to break 4 pins in a 1 piece hub and spin the crankhub , if so they must be making a thousand pounds of torque

 

[Torgus]

What is weird is they made their own capture but use the VTT spline lock.

 

[RuskiRacer]

What is weird is they made their own capture but use the VTT spline lock.

Not like they make a difference they don't hold the bolt in place just a easy $100 money maker with false marketing claims with no field evidence to back that up if anything its completely false and bolt will move with the capture in my case

 

[Torgus]

Not like they make a difference they don't hold the bolt in place just a easy $100 money maker with false marketing claims with no field evidence to back that up if anything its completely false and bolt will move with the capture in my case

Hmmm Motiv seemed to think it would work and made their own custom one? I think only a custom made one could hold, the slots do not help and promote slip I would think.

 

[RuskiRacer]

I wish I had some photos crank hub bolt backed out and took the capture with it and the crank pulley . Popped the hood and serpentine belt was not aligned and crank pulley was all sorts of crooked

 

[Dumaurier7]

Anyone see or try this VTT Spline lock copy? Its half the price!

FOR BMW M2 M3 M4 UPGRADED MODIFIED CRANK HUB + CAPTURE PLATE KIT S55 ENGINE | eBay

Designed specifically for BMW S55 N55 engines, engineered to address a common issue and provide peace of mind for owners. The OE design has been known to "slip" or "spin" on tuned cars and to a lesser extent on completely stock cars. This can lead to at best the engine requiring retiming or at...

www.ebay.com

 

[Buhala21]

It is going for a good price, but the quality is not known. If you are the crank hub, just go with a well-known brand.