Some concerns after putting m3 cams in my m50

[dude8383]

You can also see the TDC mark on the block perfectly with the radiator and grilles removed.

Nice bit of info there, I didn't remove the radiator when I removed my vanos unit only because I didn't feel like bleeding the system again. Shit sucked though, there was literally like a waffleswaffleswaffleswaffles hair of work space! I just ended up using a mirror :)

[JGood]

Got the Beisan seals in, and installed the later style diaphragm spring and discs on the intake cam.

The engine is silent, the car has regained it's low end power, and it feels perfect overall. Lots of smooth top end power with the cams. Below 4500 it feels the same as stock. Really comes alive above 5500, the whole way to 7k.

For anyone looking to do this cam swap, be sure to install the newer style disks and spring if your car doesn't already have them, and spend the $30 for the seal kit. The vanos removal/install procedure is way to long and tedious to do it twice. It only took me about 8 hours from the time I took the hood off until the time I put it back on, but it's 8 hours that I shouldn't have had to spend on it if I would have done it right the first time.

You also need an inch/lb torque wrench for this job. Getting the intake cam sprocket nuts to the proper torque is critical, there is no way to do it by hand.

Thanks to Fredk for the tools, the seals, and the disks. :p

[Wh33lhop]

Nice man. Makes me wish I held out for a vanos motor. Take some tach/speedo video if you get some time, I want to see how quick it is. :)

[JGood]

It's a little difficult to see the difference in the video. ~20whp isn't THAT much, just a noticeable difference to the driver. I didn't launch it, just rolled into the throttle in first gear. I ran a 14.4 @ 95 without the cams, it feels like I should be able to do 13.9-14.0 @ 98-99 or so with the cams.

WITHOUT s50 cams

http://vimeo.com/6548488

WITH s50 cams and cam software:

http://vimeo.com/8649991

The bottom end still feels a little weak, I'm not sure if it's just the increase in power up top that makes it feel that way, or what. I know the seal kit takes 200 miles or so to break in, so I'll give it some time.

[Wh33lhop]

:D What flywheel are you running? That is damn quick. I'm excited to go get my NV swap car tomorrow assuming the muffler shop biscuit doesn't find a way to fuck my day over again.

[JJe30]

Good stuff, I have s50 cams waitin to be put in once I gather up all my other parts.

[Jean]

Glad you figured it all out!

[JGood]

:D What flywheel are you running? That is damn quick. I'm excited to go get my NV swap car tomorrow assuming the muffler shop biscuit doesn't find a way to fuck my day over again.

m20 single mass. g260 and 3.73 LSD. 2720 lb without driver, so she's a pig...

[Wh33lhop]

Nice, I'll be running the same setup. Did you have to shave down the flywheel at all or is it stock mass?

[JGood]

Nice, I'll be running the same setup. Did you have to shave down the flywheel at all or is it stock mass?

Yes, it needs shaved about 6mm on the block side to clear the oil pan (as opposed to grinding down the oil pan, which IMO isn't a great idea, especially in comparison to shredding extra weight from the flywheel). Only cost me a few bucks more then the normal resurface at the machine shop.

[87e30]

Yes, it needs shaved about 6mm on the block side to clear the oil pan (as opposed to grinding down the oil pan, which IMO isn't a great idea, especially in comparison to shredding extra weight from the flywheel). Only cost me a few bucks more then the normal resurface at the machine shop.

I couldn't find a machine shop that would do this for me. :(

So I did shave down the oil pan. But I swear it's nearly impossible to gain enough clearance...

[Wh33lhop]

I couldn't find a machine shop that would do this for me. :(

So I did shave down the oil pan. But I swear it's nearly impossible to gain enough clearance...

Whaaat? There were like 3 or 4 machine shops that I was recommended in town, and my town is TINY.

Shaving and balancing was $100 out the door for me, but I didn't resurface since I was reusing my clutch.

[JGood]

I couldn't find a machine shop that would do this for me. :(

So I did shave down the oil pan. But I swear it's nearly impossible to gain enough clearance...

Damn, that's weird. The first machine shop I went to did it as if it was a normal procedure. I think it was like $60, which included a resurface of the other side as well, and the whole thing came back looking like a new part.

So you still don't have enough clearance? If you want, I can take my spare flywheel and have it machined and send it to ya. PM me if you're interested.

[M-technik-3]

Looks good glad it's perky for you. You moved the hp to the upper end that is all and increased the lift of the cams. The lose of lower end comes from the profiles of the cams minus the displacement increase that the 3.0L has.

[Mako18]

Certainly looks allot quicker to me.

First video looks like 0-100 is about 14 sec +/- a second seems you launch around 5 sec mark and hit 100 around the 19 sec mark. 0-60 around 6 sec..

Second video looks like 0-100 is about 11.5 sec. Launch 4.5 sec reaching 100 by 16 sec mark. 0-60 around 4.5 sec!

I think those gains are worth it!! You can see the power gain for sure!!