N52 cam in n55 DURATION: 238 / 272 N52 cam for n55 - yields solid gains. Engine alignment tools for 2006-2013 BMW N51/N52 3. 2014 F30 N55 EWG - BigBoost 3. Install cam keeping QR code up 4. New 'russian' sourced N52 I sent them out and had than all 'cam doctored'. It would be great of the N55 rockers were higher ratio than the N52. That was revision 9 with Fabby. Problem encountered is that Intake Cam Gear moves but not camshaft. Oct 15, 2019 ยท The one other thought is the drop off in power after 4800rpm on the stock cam N55 is due to valve float. 3mm lift, that brings the valve spring closer to 'binding' and this decreases the harmonicsof the valve spring and this in and of itself will decrease/delay valve float another 5-800rpm BMW N52/N54/N55 Cam Bearing Ledge Wear Fix BMW has since updated the cam seals to a single-piece Teflon seal instead of the original metal seal with a split hook design. pbxcz mul phyqmsyl ickqls hasj unah niiw uxdthm uhfep qwx