Video - These are THE BEST rod bearings for your S65/S85 - Mahle Motorsport

[Green-Eggs]

Originally Posted by Assimilator1

Re VP2 vs ACL, based on what?

Sintered backing that will deform much more easily over time. Dinan has an example of ACL bearings after 30000 miles which could not retain shape and -- according to Steve Dinan -- literally fell out of the rod big end when the cap was removed. Also, the bronze barrier between sintered backing and upper layers tends to bake and cause the upper layers to delaminate over time.

[Helmsman]

Originally Posted by Assimilator1

Which is 0.055mm, and indeed it's more than them OEM nominal clearance of 0.0381mm , and interestingly slightly less than BE's v1 0.0597 mm. [edit] Just found out that BE's v2 bearings have slightly larger Nominal Rod Bearing Clearance of 0.0681 mm (0.00268 inch), curious.

Btw, you can't tell anything much of it's quality by holding it in your hand

Where do you read about BE V2 increased clearance mate?

Ps. Please answer with "quote"...

Thx

[spammysammich]

Helmsman there is a white paper published regarding BEs measurements and work on clearance. It lists various manufacturers claimed clearance vs measurements and even talks about the shape of the bearings when bolted in place if I recall correctly. It has been a few years since I saw it but I found it in a google search.

[Helmsman]

Originally Posted by spammysammich

Helmsman there is a white paper published regarding BEs measurements and work on clearance. It lists various manufacturers claimed clearance vs measurements and even talks about the shape of the bearings when bolted in place if I recall correctly. It has been a few years since I saw it but I found it in a google search.

Thanks, yep read this quite a bit but years ago, couldn't find it on their pagae for some reason. Had some discussions with BE regarding their "nominal" clearance back then so was curious to see what might have changed.

[Assimilator1]

Originally Posted by Helmsman

Where do you read about BE V2 increased clearance mate?

Ps. Please answer with "quote"...

Thx

Good question, as I can't remember now, lol. But I think I found it on there website? I'd look now, but I don't have time atm, LMK if you find it there.

PS If you had 'thread notification on reply' turned back on I/we wouldn't have to quote all the time

[Assimilator1]

Originally Posted by Green-Eggs

Sintered backing that will deform much more easily over time. Dinan has an example of ACL bearings after 30000 miles which could not retain shape and -- according to Steve Dinan -- literally fell out of the rod big end when the cap was removed. Also, the bronze barrier between sintered backing and upper layers tends to bake and cause the upper layers to delaminate over time.

Any papers about discussing those claims?

[chappers998]

Originally Posted by Assimilator1

Ignoring the OEM bearings, it is far cheaper to get ACL bearings here in the UK than it is to get BE bearings (even when the ACL bearings come from the US and are mixed and hand measured!). So there's a logical reason for ya
Perhaps these Mahle bearings will be a worthy alternative here in the UK at least? (although I've no idea how much they are).

Depends where you get Mahle bearings from MAR sell them for £349 Evolve double it for some reason which he won't answer when I asked.

[Helmsman]

Originally Posted by Assimilator1

Good question, as I can't remember now, lol. But I think I found it on there website? I'd look now, but I don't have time atm, LMK if you find it there.

PS If you had 'thread notification on reply' turned back on I/we wouldn't have to quote all the time

Thanks, someone else reminded about BE wiki, and yes that "nominal" was increased to about 0.067 which I though was surprisingly much but anyways.

Cheers

[Robocop305]

When did BE v2 come out?

[OmairK]

Originally Posted by Robocop305

When did BE v2 come out?

Would like to know as well as I had ACM do my rod bearings in 2018. 20k miles later, I am wondering if the tighter clearance versions were around back then?

[Helmsman]

Originally Posted by OmairK

Would like to know as well as I had ACM do my rod bearings in 2018. 20k miles later, I am wondering if the tighter clearance versions were around back then?

If you refer to BE, their later version apparently is loser (rather than tighter).

[Green-Eggs]

Originally Posted by Robocop305

When did BE v2 come out?

According to the BE Wiki page:

BE Bearings (Version-2): SP1527F
Introduction: February, 2022

Originally Posted by Helmsman

If you refer to BE, their later version apparently is loser (rather than tighter).

Not necessarily. Spec changes are occasionally made. The original V1 shells were tweaked four times to fine tune the thicknesses. The V2 shell has been tweaked once already. However, no updated measurements are available as the measuring equipment is packed away for now.

[Helmsman]

Originally Posted by Green-Eggs

According to the BE Wiki page:

BE Bearings (Version-2): SP1527F
Introduction: February, 2022



Not necessarily. Spec changes are occasionally made. The original V1 shells were tweaked four times to fine tune the thicknesses. The V2 shell has been tweaked once already. However, no updated measurements are available as the measuring equipment is packed away for now.

But isn't suggested/nominal clearance more on v2, according to your page?

[Assimilator1]

Originally Posted by Helmsman

But isn't suggested/nominal clearance more on v2, according to your page?

Yes, that's what I saw anyway.

[Green-Eggs]

Originally Posted by Helmsman

But isn't suggested/nominal clearance more on v2, according to your page?

Originally Posted by Assimilator1

Yes, that's what I saw anyway.

The word "suggested clearance" never appears there. Those are, and always have been measured clearances. These numbers are derived from the "Clearance Measurements" chart immediately below these numbers.

[Helmsman]

Originally Posted by Green-Eggs

The word "suggested clearance" never appears there. Those are, and always have been measured clearances. These numbers are derived from the "Clearance Measurements" chart immediately below these numbers.

Got it, and that clearance is more for v2 than previous?

[Assimilator1]

Helmsman (tagged, seeing as you have turned off thread notification ).

Yes it is, from their page - http://wiki.rcollins.org/core/index....-2.29:_SP1527F

Bearing clearance specification.
For v1 bearings :-
Nominal Rod Bearing Clearance 0.0597 mm 0.00235 inch

For v2 bearings :-
Nominal Rod Bearing Clearance 0.0681 mm 0.00268 inch

*************************

Apologies to the op for keep talking about rival bearings, but at least you're getting your thread bumped up more often!

[Helmsman]

Originally Posted by Assimilator1

Helmsman (tagged, seeing as you have turned off thread notification ).

Yes it is, from their page - http://wiki.rcollins.org/core/index....-2.29:_SP1527F

Bearing clearance specification.
For v1 bearings :-
Nominal Rod Bearing Clearance 0.0597 mm 0.00235 inch

For v2 bearings :-
Nominal Rod Bearing Clearance 0.0681 mm 0.00268 inch

*************************

Apologies to the op for keep talking about rival bearings, but at least you're getting your thread bumped up more often!

Cheers. Pretty sure the original BE shell was slightly more open but understand they've modufied it. Still curious to why the latter/current is up to 0.068mm. Lets see if Green Egg chime in

Ps. Nope, have not turned of notifications!

[M3SQRD]

Originally Posted by Helmsman

Cheers. Pretty sure the original BE shell was slightly more open but understand they've modufied it. Still curious to why the latter/current is up to 0.068mm. Lets see if Green Egg chime in

Ps. Nope, have not turned of notifications!

The difference between v1 and v2 nominal clearance is 0.00033” which, although it’s now a larger clearance, is pretty small change practically speaking. However, I am curious why they released a v2 because I have BE v1 rod bearings installed.

[Assimilator1]

On (I think) their main website, they describe new stronger materials being used for the v2 bearing.

[M3SQRD]

Originally Posted by Assimilator1

On (I think) their main website, they describe new stronger materials being used for the v2 bearing.

Hum…I wonder why they changed to a stronger material(s) with v2 bearings? What was wrong with v1 material(s)? Have had v1 bearings installed since 2018 and as far as I know there’s no unseen bearing issues.

[tdott]

Originally Posted by M3SQRD

Hum…I wonder why they changed to a stronger material(s) with v2 bearings? What was wrong with v1 material(s)? Have had v1 bearings installed since 2018 and as far as I know there’s no unseen bearing issues.

This sums it up nicely.