288/280 vs 280/272 cams.

[Mike RT4]

Just to update this I went with the 288/280 combo as recommended to me.

When will we see the before and after dyno figures?

[Martyn]

Rocker arm 3er (11337549034) is what I ordered and used

[Michael9218]

There is also an alternative to Schrick followers: E90 320is stock followers. Same design as S54, just coated from the factory. Seems BMW learned from something....
These used to be quite cheap by comparison, but recently they have increase the price.

This should be big news...

Can anyone confirm the part number in question?

I've looked up the part numbers using RealOEM and then priced them. The E90 320is looks to be 11337549034 and is 48 Euros on the Leebmann site (@ $57 USD). The S54 rockers are part number 11337833259 and are around $55 USD in the US. Would hate to order them from Leebmann in Germany and find that they aren't the correct part...

[bjz!]

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

Same boat here.

[digger]

If you aren’t overspeeding the blower yes the added duration helps at higher rpm which is where a centrifugal blower is efficient at making boost.

[M3KVU]

Just to update this I went with the 288/280 combo as recommended to me.

[bmw m3 s50]

I like to ask what about in a supercharged situation? Would the 288 make more sense than the 280 cams since you have much more air being forced in? Would 280 cams do just as well and retain stock driveability?

[BBRTuning]

I re-used my 120k mile followers with my 288/280 install, using Dbilas cams (same spec as CAT/Shrick 288/280). Regardless of DLC coating or not, followers probably *should* be replaced along with cams, as they do interface together the same way a brake pad and rotor do. If only one is replaced, then one part will need to wear to match the other component's surface. However, I'm about 12k in with plenty of track days and have had zero issues with wear and all the lobes etc look good. Still, probably wouldn't recommend it to someone else, to be safe.

I posted about this a bit on M3F already, but HP/TQ results were interesting - almost identical to stock cams up until 6500 RPM where they start to split. Peak delta is just over 20whp. NOTE that my current setup is not completely optimised for these cams - I'm still on OE Euro short-tube headers, so going to a stepped header at this point of the build would certainly help. I'm also running 200cell Magnaflow cats, which likely don't flow as well as a high quality race cat such as HJS/GESI. Also still on 2.3x" exhaust system. Next up is going to V1 stepped headers, custom 2.5" section 1 with better HFCs, and dual full 2.5" system.

Tune was fully optimised both before and after cams, and dyno'ed within a few days of each other, so this is as accurate a comparison as possible for *JUST* changing cams. Again, just keep in mind that gains would likely be even better with the proper exhaust setup to really take advantage of these cams. This was also on a slight Ethanol mix for both runs, just to make the tuning process easier. Once I get these parts I will update with straight 91 octane and full E85 results!

JE pistons/Carrillo rod 11.5:1 S54
Dbilas 288/280 cams 12.75mm lift (some report these are the same as 12.5mm from other manufacturers)
Streamline CSL airbox
Euro headers / Magnaflow 100c cats section 1 / OE section 2 / SS Race section 3
AEM Infinity ECU tuned by me
550cc injectors

[Rudbari]

How are cams with supercharged s54 , I see vac offer supercharged cam 280/272 .

[i_love_japan]

Not affiliated to the below listing however I think the pricing is excellent if you’re able to get them for less than $1300 or so?

https://www.ebay.com/itm/SCHRICK-Performance-Camshaft-Set-BMW-S54-New/274423001732?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D225086%26meid%3Dd0b9ec3866484fccabd03a5d0d36e8d2%26pid%3D100675%26rk%3D2%26rkt%3D15%26mehot%3Dnone%26sd%3D274425519450%26itm%3D274423001732%26pmt%3D0%26noa%3D1%26pg%3D2380057&_trksid=p2380057.c100675.m4236&_trkparms=pageci%3A2083d2b9-c5d4-11ea-8a23-74dbd18000f6%7Cparentrq%3A4d7786a31730a4d626c7d16affe42fd8%7Ciid%3A1

[Altaran]

i doubt port matching to the headers is a good idea, what is the port exit size? what is the header primary ID at the flange and first tube OD? and how much power are you trying to make?I doubt they are pee shooter size.

the flow restriction is the valve seat area and areas 1" upstream and downstream thats where the attention should focus. the head you have may have had that area modified but they may have left the rest of the port untouched because they found it was big enough. Matching the port exit to the headers will unlikely help flow as that part is unlikely to be restrictive but depends on the actual size and on power level. having a step is often said to be anti reversionary and there are many proponents of keeping a step. IMO Ideally the first tube off the header matches the port size seamlessly to keep gas speed up then after like 8-10" it steps up in size.

I haven't meassured yet. I won't pull the motor before the end of the year, so I am not in a hurry. Right now I am using SS V2 headers.

How much power? Have not really pinned down a number but 420 should be possible considering other mods to motor and drivetrain. In 2 or 3 years I will likely do some sort of motor swap (S65 / S85), there is just so much more power that can be made N/A with more cylinders so I am not going to go for the last micron right now. I just already have the motorsport cylinder head collecting dust so I may as well use it...

[x Spades x]

So I'm looking at purchasing CAT 280/272 cams. I'm just about to pull the trigger on a carbon airbox, and since the motor is getting a rebuild, cams is a must.

After reading through this thread, my understanding is the 280/272 cams are a direct drop in? I have seen people recommending the followers be replaced, however it's not a necessity, right? FYI my motor had less than 60k miles when it spun a bearing (not sure if that makes any difference as the valvetrain is low mileage).

Just get coated followers. It may not make a difference... but if it does, it will save your engine. I would never have a freshly rebuilt engine, and leave something like this up to chance. It's not like this is a mod you'll be removing, etc. Go in there, do it right one time, and never think about it again. I drive my car without a care in the world and I have 194k miles on an '05 ZCP SMG (changed the pump).

[mainstreamer00]

So I'm looking at purchasing CAT 280/272 cams. I'm just about to pull the trigger on a carbon airbox, and since the motor is getting a rebuild, cams is a must.

After reading through this thread, my understanding is the 280/272 cams are a direct drop in? I have seen people recommending the followers be replaced, however it's not a necessity, right? FYI my motor had less than 60k miles when it spun a bearing (not sure if that makes any difference as the valvetrain is low mileage).

I did the the mods above, and kept my old followers, which “looked good” on visual inspection.
Like many here, you’ll be able to run these without adverse issue.
Going to be a fun build!

[Syfon]

So I'm looking at purchasing CAT 280/272 cams. I'm just about to pull the trigger on a carbon airbox, and since the motor is getting a rebuild, cams is a must.

After reading through this thread, my understanding is the 280/272 cams are a direct drop in? I have seen people recommending the followers be replaced, however it's not a necessity, right? FYI my motor had less than 60k miles when it spun a bearing (not sure if that makes any difference as the valvetrain is low mileage).

[SUPREM3]

Is there a definitive solve for the Below 3k "CSL Hesitation?"

Having this issue now and thought it was a bad fuel pump.

Issue arrived after install of 288/280 Cams. Currently trying to figure out the issue so we can get back on the dyno to get better results (Currently 331whp on 91)