288/280 vs 280/272 cams.

[Zekarus]

there are a lot of different numbers out there. the torque spec pdf file here says 288/280 and these guys here don't know it too? http://www.cslregister.com/forum/showthread.php?t=8872

i also found in a german forum that they are 288/280 but i will take tomorrow some pictures and maybe someone can compare them to schricks 288/280.

[terra]

csl has 288/280 cams and uses the same stock followers as every S54 engine. i'm also wondering why schrick recommends their dlc coated followers for their 288/280 cams.

CSL cams are 268/264

[Zekarus]

csl has 288/280 cams and uses the same stock followers as every S54 engine. i'm also wondering why schrick recommends their dlc coated followers for their 288/280 cams. i have got some csl cams that i will install as soon i can get an airbox.

[terra]

We will see (I asked him in the comments), but I be the actual issue was he didn't move the oil valve over from the stock cams when he installed the cat cams (cat cams, unlike schricks, don't come with it). 800 miles to failure implies a lack of lubrication, to me.

Those valves are more for ensuring the vanos gets enough sufficient lubrication. The cams bearings are lubricated from the journals, and the lobes are basically lubricated by what's flinging around.

I'm not convinced it was used followers that caused this, but those valves shouldn't be the issue.

[Obioban]

Are these not the valves?

According to that video, he put e39 M5 valves in because BMW doesn't sell the e46 M3 ones separately from the cams. Sooooooo... idk.

[BMWahba]

That is strange. I wonder if it'd be different if they were schrick variant.

[racinghart]

The stock cams on his car didn’t come fitted with the pressure regulator valves however he did put a set in the cat cams before he installed them. I wonder if the stock rocker arms were worn down already prior to the new cams install based on the high mileage of his car.

[Slideways]

We will see (I asked him in the comments), but I be the actual issue was he didn't move the oil valve over from the stock cams when he installed the cat cams (cat cams, unlike schricks, don't come with it). 800 miles to failure implies a lack of lubrication, to me.

Are these not the valves?

[Obioban]

This owner was not so fortunate when reusing his existing followers:

We will see (I asked him in the comments), but I be the actual issue was he didn't move the oil valve over from the stock cams when he installed the cat cams (cat cams, unlike schricks, don't come with it). 800 miles to failure implies a lack of lubrication, to me.

[Slideways]

Has anyone seen premature wear on stock followers with 280/272? I have 90k miles and the only thing setting me back from cams is the additional follower cost.

This owner was not so fortunate when reusing his existing followers:

[Obioban]

I'm very lucky that I have Paul Smith aka Polclaude here to dyno tune it after.

I was going to have him tweak my tune this spring/summer, but doesn't seem like I'm going to go able to get on a dyno this year, at the current rate...

[M3KVU]

I'm very lucky that I have Paul Smith aka Polclaude here to dyno tune it after.

[BMWahba]

I'm glad to hear that I can reuse my followers with my Schrick 280/272s. To answer your question on how much is there expected to gain, from various people I've talked to that have done the install (of course there is a ton of variance depending on supporting mods etc), but probably expect between + 15-20 hp on a good tune.

[Obioban]

I'm somewhere between 10 and 15k on my 288/280s with stock followers with no abnormal wear to report.

That makes me wonder why schrick says they’re required for the 288/280s but not the 280/272s 🤔

[terra]

I'm somewhere between 10 and 15k on my 288/280s with stock followers with no abnormal wear to report.