Maximum PSI keyed crank hub

doublespaces

General of the Army
Oct 18, 2016
8,939
4,144
0
AZ
Ride
2009 E93 335i
EDIT: Its for sale https://maximumpsi.com/product/maximum-psi-keyed-crank-hub-kit/

I've read there is a pre-order, but I haven't seen much past that. So, I assume this is the end of the problem?

24831156_2258666090825508_3519455736466691805_o.jpg


https://maximumpsi.com/maximum-psi-f8x-crank-hub-finally-testing/
 

[email protected]

Lieutenant
Nov 5, 2016
596
606
55
Bay Area
This indeed does exsit across all the platform. Word on the streets, there is a solution coming out, that doesn't require you to drill the crank...
 

The Convert

Captain
Jun 4, 2017
1,485
1,038
0
Ride
335
Doubt it's the end of the issue. Without the key on the hub being slightly shorter than the key way, forward to aft, you lose the clamping force all around the hub and now only have the cross sectional area of the key on each side to resist the torque. If they have a slightly shorter key than key way, forward to aft, they can keep all the clamping force of the normal assembly and add the strength the cross sectional area of the key on each side to its torque holding capability.
 

doublespaces

General of the Army
Oct 18, 2016
8,939
4,144
0
AZ
Ride
2009 E93 335i
That’s all I know. I’m desperately waiting on this to complete my motor.

Okay, well if you hear anything report back here if you don't mind. I think its a wise upgrade for anyone with their engine out.
 
Jan 25, 2018
14
20
0
South Amboy, NJ
www.maximumpsi.com
Ride
turbo junk
Hi guys, just chiming in with some info. There was no quality problem, just some unexpected delays. The vendor we use for the heat treating process had an equipment failure and dropped the ball on us. We got the parts back and got them to another company to finish the work. We shipped out a bunch of product yesterday and will ship out the remaining orders today. We have parts for S55, N55, and N54 ready to go.
 
  • Like
Reactions: doublespaces

The Convert

Captain
Jun 4, 2017
1,485
1,038
0
Ride
335
What kind of heat treating is done? Did you guys cut up a sample or heat treat a sample to break to ensure the new place was able to meet your quality requirements?
 
Jan 25, 2018
14
20
0
South Amboy, NJ
www.maximumpsi.com
Ride
turbo junk
What kind of heat treating is done? Did you guys cut up a sample or heat treat a sample to break to ensure the new place was able to meet your quality requirements?

The teeth are induction hardened, and the parts start from a high strength alloy steel to begin with. Yes, one part was cut up for testing/inspection after the heat treatment.