Improved Clutch Over-Center spring - Rev. 2 is ready!

Buy, sell, or trade parts.
Post Reply
BenGerman
Posts: 704
Joined: Jun 26, 2016 2:19 PM
Location: Northeast OH

Improved Clutch Over-Center spring - Rev. 2 is ready!

Post by BenGerman »

After the Sport seat gearboxes, S38 crank hubs and S38 indicator holders, here is the next project for the E28 crowd.
It’s a common problem that the clutch spring shaft bends, breaks, the snap ring pops out and the whole assembly falls apart or the bottom “feet” bend.

Image
Source: https://uploads.tapatalk-cdn.com/201602 ... f8846d.jpg

Image
Image
Image

Image
Image
Image


More of the details are explained in this thread:

http://www.mye28.com/viewtopic.php?f=3&t=147421

This is the original part: 35311152540, used in E28, E34, E24, E23, E32 and E31.
It can also be used for: 35311151990, which is used in all E30s and some E28s with smaller engines. But you will have to reuse the old spring that is on the factory assembly.
As a heads up, we've been noticing an issue with some E34 models using a weaker spring rate assembly from BMW, the 35311151990 PN.
The spring rate we are using in our assembly replicates the 35311152540 spring.

Depending on your clutch, this might lead to the clutch pedal sticking to the floor from time to time.
If you notice that the spring assembly that is currently in your car (or on your floor) uses the smaller of the two springs, you can switch the original spring into the new assembly.

Just make sure you use loctite on the bottom Allen head screw and use the correct preset length from the assembly instructions.

The difference can be seen in this picture:
Image
Here is the timeline:

Preorders: 8/31-9/30
Manufacturing; 9/30-10/31
Shipping: after 10/31

Price per piece:

$140 which includes the a new spring. 100% deposit required before preorder timeline is up.

I think compared to the $86 for the original part that’s still cheap cast Al and plastic we came up with a competitive pricing. The parts will be made from 4340 Alloy with the improved design.
Last edited by BenGerman on Jul 07, 2021 12:27 PM, edited 9 times in total.
Spen
Posts: 1313
Joined: Feb 24, 2011 12:38 AM
Location: Seattle, WA, USA

Re: Improved Clutch Over-Center spring

Post by Spen »

Entrepreneurship makes us all more free and wealthier. Thumbs up!
RonW
Posts: 5301
Joined: Feb 12, 2006 1:00 PM
Location: Long Island, NY

Re: Improved Clutch Over-Center spring

Post by RonW »

So:
  1. Instructions, e.g. do we reuse the plastic sleave for the bolt?
  2. How do we pay? Do you take PayPal?
Totally irrelevant, but according to my profile, this is my 5000th post.
BenGerman
Posts: 704
Joined: Jun 26, 2016 2:19 PM
Location: Northeast OH

Re: Improved Clutch Over-Center spring

Post by BenGerman »

The setup will come with a new PTFE bronze bushing.
We will also provide the matching sleeve and bolt. More details coming soon.

We will start an ongoing list in this thread.
I will contact everybody that’s interested via PM.

Thanks for those hints, forgot them when making the initial post.
Kyle in NO
Posts: 17637
Joined: Feb 12, 2006 1:00 PM
Location: Nasty Orleans------> Batten-Rooehjch------>More Souther LA

Re: Improved Clutch Over-Center spring

Post by Kyle in NO »

1. Kyle in NO
ARico08
Posts: 60
Joined: Jul 27, 2017 9:00 PM
Location: Mesa, AZ

Re: Improved Clutch Over-Center spring

Post by ARico08 »

Put me down for one!
RonW
Posts: 5301
Joined: Feb 12, 2006 1:00 PM
Location: Long Island, NY

Re: Improved Clutch Over-Center spring

Post by RonW »

Me too.
lenaxia
Posts: 80
Joined: Jun 24, 2017 3:05 PM
Location: Seattle

Re: Improved Clutch Over-Center spring

Post by lenaxia »

How's the feel relative to stock? Is it lighter or heavier or about the same?
BenGerman
Posts: 704
Joined: Jun 26, 2016 2:19 PM
Location: Northeast OH

Re: Improved Clutch Over-Center spring

Post by BenGerman »

lenaxia wrote:How's the feel relative to stock? Is it lighter or heavier or about the same?
Since the spring rate doesn’t change it can be set exactly like the stock setup.
Some people like to play with the preload a bit to vary the clutch feel.
This is not really possible with the stock setup, as the snap ring usually gets ripped out by more preload.
There is still ten potential that we will offer different spring rates. But I can’t guarantee that yet.

Order List:

Kyle in No - 1
ARico08 - 1
RonW -1
Sam 84, 533i
Posts: 774
Joined: Nov 26, 2010 8:23 PM
Location: Seattle Washington

Re: Improved Clutch Over-Center spring

Post by Sam 84, 533i »

I will take one.
cek
Posts: 9044
Joined: Mar 18, 2013 6:25 PM
Location: əʞɐl ʇlɐs puɐ əlʇʇɐəs
Contact:

Re: Improved Clutch Over-Center spring

Post by cek »

Three please.
Sagi
Posts: 118
Joined: Oct 14, 2016 7:54 PM

Re: Improved Clutch Over-Center spring

Post by Sagi »

Hi, i will take one. shipping to Israel.
Thanks
Rich in Tupelo
Posts: 2915
Joined: Feb 12, 2006 1:00 PM
Location: Spring Hill, TN

Re: Improved Clutch Over-Center spring

Post by Rich in Tupelo »

I'll take one. Just post or send me your paypal or payment information.

Thanks for taking the time to sort out this issue and design this!
milarsky
Posts: 450
Joined: Jan 26, 2013 12:19 PM
Location: NYC

Re: Improved Clutch Over-Center spring

Post by milarsky »

I'll take one!

jeff M
athayer187
Posts: 1593
Joined: May 10, 2006 11:27 AM
Location: Cheshire, CT

Re: Improved Clutch Over-Center spring

Post by athayer187 »

I'm in for 1.
BenGerman
Posts: 704
Joined: Jun 26, 2016 2:19 PM
Location: Northeast OH

Re: Improved Clutch Over-Center spring

Post by BenGerman »

Thanks guys for all the interest.

Order List:

Kyle in No - 1
ARico08 - 1
RonW -1
Sam 84, 533i - 1
cek - 3
Sagi - 1
Rich in Tupelo - 1
milarsky - 1
athayer187 - 1

I’m still traveling and will send the first Round of payment information tonight from home.
Limbo00RT
Posts: 45
Joined: Aug 17, 2015 2:09 AM
Location: CA

Re: Improved Clutch Over-Center spring

Post by Limbo00RT »

I'm in for one.
Pavel
Posts: 1424
Joined: Jan 02, 2012 3:07 PM
Location: Sugar Land, TX

Re: Improved Clutch Over-Center spring

Post by Pavel »

As usual, in for your products.
MannyE
Posts: 216
Joined: Aug 21, 2008 8:08 PM
Location: San Diego, CA

Re: Improved Clutch Over-Center spring

Post by MannyE »

One for me.
lenaxia
Posts: 80
Joined: Jun 24, 2017 3:05 PM
Location: Seattle

Re: Improved Clutch Over-Center spring

Post by lenaxia »

I'll take one
SlickDizzy
Posts: 836
Joined: Apr 26, 2007 7:03 PM
Location: Milwaukee, WI
Contact:

Re: Improved Clutch Over-Center spring

Post by SlickDizzy »

I'm in for one! Wish I could get my hands on it before my cross-country road trip in October, but alas. Should be worth the wait.
BRRV
Posts: 3145
Joined: Feb 12, 2006 1:00 PM
Location: Colorado High Plains / formerly The Lone Star State

Re: Improved Clutch Over-Center spring

Post by BRRV »

Put me in for one. I've broken three of them.
funfunfer
Posts: 715
Joined: Oct 03, 2009 7:58 PM
Location: Montgomery, TX

Re: Improved Clutch Over-Center spring

Post by funfunfer »

Put me in for 2.
Jim
G5SP
Posts: 16
Joined: Oct 11, 2017 1:37 PM
Location: Savannah

Re: Improved Clutch Over-Center spring

Post by G5SP »

I’d like one please shipped to zip 31410. Thanks, G5SP
knunger
Posts: 718
Joined: Feb 12, 2006 1:00 PM
Location: Tucson,AZ.

Re: Improved Clutch Over-Center spring

Post by knunger »

I'll take 2!

(awaiting PM for payment instructions!)

Thanks
Post Reply