288/280 vs 280/272 cams.

[Projecte46m3]

As far as gears...everyone has their own opinion...best best is to try it out and go from there...you're going to get a mixed bag of reviews and a ton of opinions on what each person personally likes...

[duracellttu]

Can anybody share the source information on where they verified that the BMW rocker arm PN 11-33-7-549-034 are DLC coated?

[jager911]

My data point: 288/280 Cat Cams with new followers (oil bridge and E39 M5 pressure relief valves), Turner CSL airbox, Euro headers, stock section 2, El Diablo muffler, Alpha-N dyno tune by HTE. The dyno run before mods yielded 292whp. After mods and multiple runs, it peaked at 346whp so gain of 54hp. I just swapped to a more free flowing race muffler. I'm going to dyno the car again to see if it did anything.

[bigjae46]

My data point: 288/280 Cat Cams with new followers (oil bridge and E39 M5 pressure relief valves), Turner CSL airbox, Euro headers, stock section 2, El Diablo muffler, Alpha-N dyno tune by HTE. The dyno run before mods yielded 292whp. After mods and multiple runs, it peaked at 346whp so gain of 54hp. I just swapped to a more free flowing race muffler. I'm going to dyno the car again to see if it did anything.

Would it be possible to post a dyno?

[arg617]

Can anybody share the source information on where they verified that the BMW rocker arm PN 11-33-7-549-034 are DLC coated?

Would love to know this as well. It’s looking like I need to replace the head gasket so thinking of changing cams “while we’re in there”. The Schrick rocker arms seem to be on back order, so would be great if these were a good alternative….

[duracellttu]

Would love to know this as well. It's looking like I need to replace the head gasket so thinking of changing cams “while we're in there”. The Schrick rocker arms seem to be on back order, so would be great if these were a good alternative….

The only source I can find is the website below. However, it's hard to tell if this guys claims are backed by a truthful source. I can't find much more info the P54 engine.

https://euroconnex.co/blogs/the-phoenix-e46-m3/let-em-brag

[Martyn]

I am many others have used the BMW 320i / 11-33-7-549-034 rockers without issue.

[duracellttu]

I am many others have used the BMW 320i / 11-33-7-549-034 rockers without issue.

Thanks for chiming in! Just wondering how you found out these parts are DLC coated? Google doesn't come up with any info on the P54 engine details. I know several owners have used them without issue.

[Randall921]

I am many others have used the BMW 320i / 11-33-7-549-034 rockers without issue.

Where can we source these?


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[1bluemcm]

Where can we source these?


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Seem to be completely unavailable.

[C///M]

Sorry I haven't kept up on the thread, but just looking at the last couple posts, I wanted to confirm, the rocker arms from the P45 and P54 (same parts) are indeed DLC rockers direct from BMW.

I don't have my documentation/research still on hand, but I used these with my 288/280 cams. I will double check the part number, I wasn't aware these were NLA.

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[ac427]

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

Is Paul still around for tuning work?

[Snagg30]

Hei everyone! I need some help, i have som wear on both my camshafts wich have done 174.000km, they need to be replaced and i am thinking to do 288/280 with new rockers from Schrick, but my problem is that Schrick is on back order until end of 2024 and they say among others that you can not use OEM parts. Any toughts?

is it a option to go for 280/272 cams? I see some places say you can use OEM as long as they are new. But here also i see some places mentions you «have» to use dlc coated from schricks

[Altaran]

Hei everyone! I need some help, i have som wear on both my camshafts wich have done 174.000km, they need to be replaced and i am thinking to do 288/280 with new rockers from Schrick, but my problem is that Schrick is on back order until end of 2024 and they say among others that you can not use OEM parts. Any toughts?

is it a option to go for 280/272 cams? I see some places say you can use OEM as long as they are new. But here also i see some places mentions you «have» to use dlc coated from schricks

You don't have to use dlc coated rockers, but it's highly recommended. It doesn't matter what cam set you go with just make sure you use new rockers.

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[digger]

Hei everyone! I need some help, i have som wear on both my camshafts wich have done 174.000km, they need to be replaced and i am thinking to do 288/280 with new rockers from Schrick, but my problem is that Schrick is on back order until end of 2024 and they say among others that you can not use OEM parts. Any toughts?

is it a option to go for 280/272 cams? I see some places say you can use OEM as long as they are new. But here also i see some places mentions you «have» to use dlc coated from schricks

The 280/272 is a good proven option, you'll get differening viewpoints whether you can reuse the stock rockers but IMO your cam is worn that to me says the rockers are suspect as well so replacement would be mandatory if you arent going to follow schricks requirements.