JB4tech.com - International Turbo Tuning Discussion
(#1)
Old
209streetsweepers 209streetsweepers is offline
New Member
 
Posts: 2
Join Date: Dec 2021
Car: 2009 335i
Exclamation Spinning crank hubs - 04-06-2022, 11:19 AM

At what power level, or how often do n54ís spin crank hubs? Iím on pure 600ís e50 mix and going to go PI soon, just have that worry of spinning the hub in the back of my head. If itís something I need to replace before I turn the car up then I will.
Reply With Quote
(#2)
Old
THE BEAST THE BEAST is offline
Demigod
 
Posts: 1,722
Join Date: Apr 2016
Car: 2008 E93
Default 04-06-2022, 11:17 PM

Quote:
Originally Posted by 209streetsweepers
At what power level, or how often do n54’s spin crank hubs? I’m on pure 600’s e50 mix and going to go PI soon, just have that worry of spinning the hub in the back of my head. If it’s something I need to replace before I turn the car up then I will.
It's not so much the power level that causes the failure. Manual trans I believe have more issues with this in general.
BMW design is sh1t.
Oh and if N54_Destroyer is driving it....its just a matter of time, LOL
Reply With Quote
(#3)
Old
ruskiracer ruskiracer is offline
Junior Member
 
Posts: 138
Join Date: Oct 2020
Car: e93 335i
Default 04-06-2022, 11:30 PM

Oh with N54_Destroyer its only a matter of a couple pulls. My manual transmission e93 spun the hub with 4 guys loaded in it , with my 6875 single turbo at about 7500 rpms. You end up junkiing the valves and potentially the pistons. I sell insane crank hubs which in my opinion are the best way to forsure prevent a crank hub failure. N54 destroyer destroyed his buddys hub at just like a 20 psi tune on daw turbos


Manual swapped e93, single turbo precision 6875
Reply With Quote
(#4)
Old
THE BEAST THE BEAST is offline
Demigod
 
Posts: 1,722
Join Date: Apr 2016
Car: 2008 E93
Default 04-06-2022, 11:32 PM

Quote:
Originally Posted by ruskiracer
Oh with N54_Destroyer its only a matter of a couple pulls. My manual transmission e93 spun the hub with 4 guys loaded in it , with my 6875 single turbo at about 7500 rpms. You end up junkiing the valves and potentially the pistons. I sell insane crank hubs which in my opinion are the best way to forsure prevent a crank hub failure. N54 destroyer destroyed his buddys hub at just like a 20 psi tune on daw turbos
LMMFAO !!!!🤣
Reply With Quote
(#5)
Old
N54_Destroyer N54_Destroyer is offline
New Member
 
Posts: 2
Join Date: Apr 2022
Car: E92 335i/ E60 535i
Default 04-06-2022, 11:40 PM

I’ve been summoned lmao. I spun my friends cars crank hub at 17psi on daws with e50 in the tank. Stock clutch held on longer then the crank hub.
Reply With Quote
(#6)
Old
THE BEAST THE BEAST is offline
Demigod
 
Posts: 1,722
Join Date: Apr 2016
Car: 2008 E93
Default 04-06-2022, 11:43 PM

So.....is it the driver ?
The power?
The trans ?
Reply With Quote
(#7)
Old
THE BEAST THE BEAST is offline
Demigod
 
Posts: 1,722
Join Date: Apr 2016
Car: 2008 E93
Default 04-06-2022, 11:44 PM

And why isn't Torgie in this thread ?��
Reply With Quote
(#8)
Old
N54_Destroyer N54_Destroyer is offline
New Member
 
Posts: 2
Join Date: Apr 2022
Car: E92 335i/ E60 535i
Default 04-06-2022, 11:46 PM

Mileage plays a role
Reply With Quote
(#9)
Old
THE BEAST THE BEAST is offline
Demigod
 
Posts: 1,722
Join Date: Apr 2016
Car: 2008 E93
Default 04-06-2022, 11:49 PM

Quote:
Originally Posted by ruskiracer
Oh with N54_Destroyer its only a matter of a couple pulls. My manual transmission e93 spun the hub with 4 guys loaded in it , with my 6875 single turbo at about 7500 rpms. You end up junkiing the valves and potentially the pistons. I sell insane crank hubs which in my opinion are the best way to forsure prevent a crank hub failure. N54 destroyer destroyed his buddys hub at just like a 20 psi tune on daw turbos
What was mileage on the E93 when it let go ?
Reply With Quote
(#10)
Old
Steve @ BMS/Fuel-It!'s Avatar
Steve @ BMS/Fuel-It! Steve @ BMS/Fuel-It! is offline
Tuner
 
Posts: 21,116
Join Date: Oct 2012
Car: 135i
Default 04-07-2022, 10:48 AM

700whp auto and wife spun it during a 1/2 mile race. Not sure if the 8500rpms was pre or post spin...I wasn't driving and she's not sure...she was too caught up in the moment.



Click on our banner to visit our website!
Video of our Stage 2 LPFP upgrade installation.

BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways.
Reply With Quote
(#11)
Old
THE BEAST THE BEAST is offline
Demigod
 
Posts: 1,722
Join Date: Apr 2016
Car: 2008 E93
Default 04-07-2022, 04:56 PM

Quote:
Originally Posted by Steve @ BMS/Fuel-It!
700whp auto and wife spun it during a 1/2 mile race. Not sure if the 8500rpms was pre or post spin...I wasn't driving and she's not sure...she was too caught up in the moment.
Mileage on motor ?
Was it set up to rev out more in tune ?
Reply With Quote
(#12)
Old
ruskiracer ruskiracer is offline
Junior Member
 
Posts: 138
Join Date: Oct 2020
Car: e93 335i
Default 04-10-2022, 07:34 AM

Quote:
Originally Posted by Steve @ BMS/Fuel-It!
700whp auto and wife spun it during a 1/2 mile race. Not sure if the 8500rpms was pre or post spin...I wasn't driving and she's not sure...she was too caught up in the moment.
First time I've heard about an auto spinning the hub. Quite interesting would be keen on more details on the setup if on twins or single . Mine was on a built motor which I noobly reused friction disks. Brand new crank hub bolt though torqued to a touch beyond spec. 30 psi out the 6875 when it let go in the top of 3rd around 7500 rpm


Manual swapped e93, single turbo precision 6875
Reply With Quote
(#13)
Old
Steve @ BMS/Fuel-It!'s Avatar
Steve @ BMS/Fuel-It! Steve @ BMS/Fuel-It! is offline
Tuner
 
Posts: 21,116
Join Date: Oct 2012
Car: 135i
Default 04-11-2022, 10:21 AM

Motor had 50K miles (over 30K) tuned and had a hard life. There was tons of testing done on that car and we ran a bunch of dynos and events in that car. The day before it was running at a 1/4 mile event (digs and rolls) but it spun it at 1/2 mile event also running digs and rolls.

It had twins on it.



Click on our banner to visit our website!
Video of our Stage 2 LPFP upgrade installation.

BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways.
Reply With Quote
(#14)
Old
THE BEAST THE BEAST is offline
Demigod
 
Posts: 1,722
Join Date: Apr 2016
Car: 2008 E93
Default 04-12-2022, 11:10 PM

Quote:
Originally Posted by Steve @ BMS/Fuel-It!
Motor had 50K miles (over 30K) tuned and had a hard life. There was tons of testing done on that car and we ran a bunch of dynos and events in that car. The day before it was running at a 1/4 mile event (digs and rolls) but it spun it at 1/2 mile event also running digs and rolls.

It had twins on it.
Thoughts on actual cause why it slipped ?
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump




vBulletin Skin developed by: vBStyles.com
Copyright © 2007 - 2022, JB4tech.com