[E91 Hoarder]

Purchased a set of MILVS from Bimmer MILVS.

Which part of a MILVS is a "modified" part? I assume it is the #2 on the pic below.

Took a digital caliper to measure the thickness of the modified part. It appears there is some variation of thickness. Sent a message BimmerMilvs asking what are the tolerances for the variation, and received a response of 0.000" which I interpret as no variation up to a thousands (not sure he meant inches or mm)

Could somebody confirm what area is modified on ILVS, what is variation tolerance and the target thickness?

[Leucosticte]

I thought it was #1, to me, that makes more sense since it achieves the goal of dropping the support down which also drops down the intermediate lever so the valve can open more. I do not know what the tolerances and thickness are as I just popped them into my car without measuring them.

[TGTIW]

Leucosticte is correct. #2 is for spring clearance during installation.

[E91 Hoarder]

Originally Posted by Leucosticte

I thought it was #1, to me, that makes more sense since it achieves the goal of dropping the support down which also drops down the intermediate lever so the valve can open more. I do not know what the tolerances and thickness are as I just popped them into my car without measuring them.

Originally Posted by TGTIW

Leucosticte is correct. #2 is for spring clearance during installation.

Thank you guys. So for the #1 it appears to be 0.09mm variation.
Is this within the margin of error, or not acceptable?

[TGTIW]

I have two stock sets I pulled off of cars on Sunday I just measured.
One set ranges from 11.14 - 11.12 - 11.11 - 11.10
The other, 11.12 - 11.14 - 11.15 - 11.17 - 11.20
This seems to be within the range that you're seeing on the modified ones, so regardless of performance implications, it's the same QC standards as BMW.

[TGTIW]

I do have to add, I think the overall thickness of the block is less critical than the mounting face to intermediate lever roller point, which I don't have the ability to measure. My guess is that BimmerMilvs removes the same fixed amount of material from each block so the variations you're seeing are a result of the original block's dimensions.

[AmuroRay]

Don’t be scummy and try to steal his idea.

[TGTIW]

Who's doing what now?

[E91 Hoarder]

Originally Posted by AmuroRay

Don’t be scummy and try to steal his idea.

Did you even read what the discussion is about?

[AmuroRay]

Originally Posted by E91 Hoarder

Did you even read what the discussion is about?

Absolutely. And I also know that counterfeit MILVs exist - possibly from someone else asking innocuous questions, just as yourself.

Notice I didn't accuse you of anything, I simply said DON'T.

[E91 Hoarder]

Originally Posted by AmuroRay

Absolutely. And I also know that counterfeit MILVs exist - possibly from someone else asking innocuous questions, just as yourself.

Notice I didn't accuse you of anything, I simply said DON'T.

The point of this thread is about the quality control and what is the acceptable deviation in these modified lifters. Given the application, it seems to be very important there is none. I need to know wether the set I have received is good or not.
FYI, I first contacted Martin, but he wasn’t responsive to my follow up question, hence I took it here.

This is technical forum, please contribute, or take your arguments to the the general section.

[AmuroRay]

Originally Posted by E91 Hoarder

The point of this thread is about the quality control and what is the acceptable deviation in these modified lifters. Given the application, it seems to be very important there is none. I need to know wether the set I have received is good or not.
FYI, I first contacted Martin, but he wasn’t responsive to my follow up question, hence I took it here.

This is technical forum, please contribute, or take your arguments to the the general section.

My guy, not only was I on this forum when these were being tested and developed on the bench by Marty, I'm sure I contributed far more than you have.

[E91 Hoarder]

Originally Posted by AmuroRay

My guy, not only was I on this forum when these were being tested and developed on the bench by Marty, I'm sure I contributed far more than you have.

That's awesome. Thank you for that. Any chance you can ping Martyn, and confirm if the deviation up to 0.09mm is within the acceptable range?

[AmuroRay]

Originally Posted by E91 Hoarder

That's awesome. Thank you for that. Any chance you can ping Martyn, and confirm if the deviation up to 0.09mm is within the acceptable range?

I would assume so, when Martin was making these he inspected them at the machine shop - new and used and comments were made that there was no wear to the modified part. I'm not sure why it would be an issue.

I'll email him.

[Hotter]

I think MILVS is a scam:

[Leucosticte]

I thought they have been extensively tuned for, with noticeable dyno gains before and after installing the milvs?