288/280 vs 280/272 cams.

[CrisSilberGrau]

3000km service after new cams and followers. Didn't see any sign of abnormal wear whatsoever but did notice gunk in my oil filter. Wonder if it's leftovers from the assembly lube I used. Interestingly the clearances were all slightly larger than when I did the install over winter so I reshimmed all valves.

You went with 288/280 and new followers i assume?

Would someone be able to explain the main reasoning between new followers being recommended for 288s vs 280s?

Has anyone not done followers for 288s and found no issues, conversely what are the issues that arise from not doing them?

[Mr.wReckless]

3000km service after new cams and followers. Didn't see any sign of abnormal wear whatsoever but did notice gunk in my oil filter. Wonder if it's leftovers from the assembly lube I used. Interestingly the clearances were all slightly larger than when I did the install over winter so I reshimmed all valves.

[Mr.wReckless]

I've never seen anybody adj the valves using that method. Every video I've ever watched, and pretty much everyone I've ever talked to measures the clearance between the cam lobe/follower...using .008"IN (20mm) and .012"EX (25mm) as the proper clearances. (I actually even adj mine a bit tighter than that.😉) That's a new one on me.

Yeah all videos I've seen too has measured the lash between the back of the lobe and the follower, and this is what I did. And if the rocker ratio is as described per the e-mail from CatCams then my measured .20 and .25 between the lobe and the follower should equate to a slightly larger lash between the valve tip and the follower.

Regards

[stash1]

I had a short e-mail conversation with CatCams about this, and here is their reply:


Regarding valve clearance: don't go on rumors but on datasheets:
http://www.catcams.com/tabid/340/Def...nguage=english
I'd go on intake 0.20mm / exhaust 0.25mm, measured at the valve tip. Due to the rocker ratio, the measured clearance between the lobe and the rocker arm is smaller.


I was in two minds about the last part of the message, "measured at the valve tip". But I ended up following these clearances with the tip of the cam pointing 180 degrees away from the follower/valve. I've yet to hear any ticks or notice anything abnormal after about 1500kms, the car runs strong on a Hassan remote tune. Will soon change the oil and recheck clearances for peace of mind.

Regards

I've never seen anybody adj the valves using that method. Every video I've ever watched, and pretty much everyone I've ever talked to measures the clearance between the cam lobe/follower...using .008"IN (20mm) and .012"EX (25mm) as the proper clearances. (I actually even adj mine a bit tighter than that.😉) That's a new one on me.

[Mr.wReckless]

.25 on both sides per CatCam?

http://www.catcams.com/products/cams...nguage=english

Are you referring to the lower number from the graph on the right? Because the table on the left lists valve lash as OEM... Granted for the Shrick cams the "ventilspiel" is listed at .25 for both intake and exhaust so IDK.

Regards

[/M3]

.25 on both sides per CatCam?

http://www.catcams.com/products/camshafts/datasheet.aspx?ENGINE_id=302&CAMSETUP_id=1526&Language=english

[Mr.wReckless]

the lash specs come on the camcard and are also available on the suppliers websites.

http://www.catcams.com/products/camshafts/datasheet.aspx?ENGINE_id=302&CAMSETUP_id=1526&Language=english

http://www.catcams.com/products/camshafts/datasheet.aspx?ENGINE_id=302&CAMSETUP_id=1533&Language=english

https://schrick.com/media/75/87/eb/1644872935/schrick_alter_katalog.pdf

normally you measure between the shim (effectively valve tip) and the follower.

You can also do between the lobe base circle and follower but you need to account for the follower ratio which on s54 is like 1 or slightly more. this sometime helps on old engines when the stem of the valve gets dished and the feeler gives a false reading but should not be required nor is it recomended.

Didn't know you were suppose to measure between the follower and the shim/valve. I did mine between the lobe base and the follower with .20 and .25 clearance. I do find it a bit strange that CatCam representative referred me to the cam spec sheet, which for CatCam says OEM, but for Shrick says .25 on both IN & EX, however I was advised clearances as above. OEM has a range though, .18-.23 for IN and .28--33 for EX according to the torque spec thread chart, so I might be a bit on the tight side on the exhaust side regardless, and I also did mine with a cold engine as it sat over winter.

Regards

[digger]

the lash specs come on the camcard and are also available on the suppliers websites.

http://www.catcams.com/products/camshafts/datasheet.aspx?ENGINE_id=302&CAMSETUP_id=1526&Language=english

http://www.catcams.com/products/camshafts/datasheet.aspx?ENGINE_id=302&CAMSETUP_id=1533&Language=english

https://schrick.com/media/75/87/eb/1644872935/schrick_alter_katalog.pdf

normally you measure between the shim (effectively valve tip) and the follower.

You can also do between the lobe base circle and follower but you need to account for the follower ratio which on s54 is like 1 or slightly more. this sometime helps on old engines when the stem of the valve gets dished and the feeler gives a false reading but should not be required nor is it recomended.

[Mr.wReckless]

Out of topic but didn’t want to open a new thread. What are the valve clearance specs for the 272/280 CatCams? I’m assuming it isn’t the same as factory the S54 valve clearance specs?

I had a short e-mail conversation with CatCams about this, and here is their reply:


Regarding valve clearance: don't go on rumors but on datasheets:
http://www.catcams.com/tabid/340/Def...nguage=english
I'd go on intake 0.20mm / exhaust 0.25mm, measured at the valve tip. Due to the rocker ratio, the measured clearance between the lobe and the rocker arm is smaller.


I was in two minds about the last part of the message, "measured at the valve tip". But I ended up following these clearances with the tip of the cam pointing 180 degrees away from the follower/valve. I've yet to hear any ticks or notice anything abnormal after about 1500kms, the car runs strong on a Hassan remote tune. Will soon change the oil and recheck clearances for peace of mind.

Regards

[duracellttu]

Out of topic but didn’t want to open a new thread. What are the valve clearance specs for the 272/280 CatCams? I’m assuming it isn’t the same as factory the S54 valve clearance specs?

It would be good to add valve clearance specs for Schrick cams as well for both 272/280 and 280/288.

[/M3]

Out of topic but didn’t want to open a new thread. What are the valve clearance specs for the 272/280 CatCams? I’m assuming it isn’t the same as factory the S54 valve clearance specs?

[Martyn]

No issues using them at all.

[CrisSilberGrau]

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...

I cant find these anywhere that ships to Canada except for Schmiedmann. Im gathering numerous members here are running this part number with the 288s? This should be huge news, thats considerable savings. Updates on builds with this part number would be amazing. Martyn

[BMWfanz]

Hi guys! If someone got 288/280 or 280/272 - dm plz, intrested in buying

[terra]

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...

Yeah they are known. Also used on the P54 engine. Basically identical to the stock S54 fingers, except have a DLC coating. No reason to spend big money on the Schricks while those are available.