M50NV Camshaft Advance help.

[yazansoft]

hello,

i read this in http://forums.bimmerforums.com

On the m50nv you can replace the exhaust cam with another m50nv intake cam and time the intake side 4° advanced. This will get you some very nice mid-range torque, but an erratic/rough idle. If you do this then I would recommend that you stick with the stock weight flywheel. I did this with a 12.5lb FW and the idle was pretty bad. The plus side is the gobs of torque at 3,500rpm, the down side, the power band would drop off a lot sooner.

Don't worry about valves hitting pistons when you advance the cam. 4° is the max you can advance and for whatever reason the engineers slotted the cam gear for that amount.

Have fun.

i want to know how can i advance the intake camshaft? any picture "for example" and the direction? clockwise ,clock round? and how many teeth "if i talking about correct thing"

M50NV
M52B28 CRANK
M50B25 VANOS PISTON
Compression : 220 - 224 Psi

thanks

[yazansoft]

any help? :(

other question about compression, god or not? i rebuild engine before 3 month.

[10Toes]

Loosen cam sproket bolts, turn cam, tighten bolts.

http://www.r3vlimited.com/board/showthread.php?t=166368

[N2MYE30]

Let me know how this turns out. I put a thread about this (hot cam setup) a while back with little feedback.

[nando]

4 degrees is a huge amount to adjust a cam. try 2 degrees first. you can end up trading off way too much HP (or torque, depending on which way you go) by moving the cam so far away from it's optimum point. the overall area under the curve will shrink (even if a peak value goes up). the car can feel faster but be slower, and your idle and other driveability issues will suck.

actually, the whole thing is silly. yes, the OEM position has it's compromises, but BMW spent a lot of time figuring out where the cam is timed best. This isn't something you do without a dyno, either.