S50 camshaft tray in M42

[eur04lif3]

Has anyone done this modification to their m42?

http://www.youtube.com/watch?v=ynVBlDMow3k

[TobyB]

No. Are you planning on spinning to 8500? Got E36 valves already?

Chit, he's now using a friction saw to cut aluminum... this should be good!

Oooh, and now he's belt- sanded the mating surface!

'we'll see ya soon!'

t

[eur04lif3]

I'm not suggesting to use his manufacturing processes. What i am interested is in the concept of reducing the diameter to install smaller lifters to achieve a higher reving engine.
After reading some online, you could also sleeve some bronze bushing.

[wazzu70]

You can also upgrade to the later E36 lifters that are the same diameter but lighter, or the VW lifters. Both of these are drop in replacements (not to be confused with the later E36 smaller diameter lifters).

When you have a cam lobe to lifter direct contact, having the biggest diameter lifter possible is advantageous. With a smaller surface the lifters tend to rock in the bores more.

Just my thoughts on the matter.

[eur04lif3]

Nick, when does one know that the lifters need replacing?

I'm getting loud ticking sounds, especially from 3 & 4th cylinder, and i'm thinking it could be my lifters.

http://www.youtube.com/watch?v=n6A6rMnafJw

PS. i'm liking your VEMS set up, i'm thinking of doing it this summer as well.
Do you have any information of it anywhere on the web?

[Dj Buttchug]

You can also upgrade to the later E36 lifters that are the same diameter but lighter, or the VW lifters. Both of these are drop in replacements (not to be confused with the later E36 smaller diameter lifters).

When you have a cam lobe to lifter direct contact, having the biggest diameter lifter possible is advantageous. With a smaller surface the lifters tend to rock in the bores more.

Just my thoughts on the matter.

this. as stated before the lighter same bore size lifter is the better option imo

[bmwman91]

Yeah, at the moment I am convinced that you want to stick with the stock 35mm diameter lifters. I know that some of the later M/S5x engines used lighter 35mm lifters with smaller fluid reservoirs. That's what MM put in my engine, so they could probably tell you what the lightest 35mm ones are.

As wazzu mentioned, smaller ones are more prone to rocking. Additionally, the cam lobe is more likely to run up/over the edge of the lifter, and you had darn well better be running a very high quality synthetic oil or you will eat the noses off of the lobes.

[wazzu70]

Nick, when does one know that the lifters need replacing?

I'm getting loud ticking sounds, especially from 3 & 4th cylinder, and i'm thinking it could be my lifters.

http://www.youtube.com/watch?v=n6A6rMnafJw

PS. i'm liking your VEMS set up, i'm thinking of doing it this summer as well.
Do you have any information of it anywhere on the web?

You know, I'm not sure when is really best to replace them. When they make noise, that definitely could be the issue as long as you are getting proper oiling.

If it was from the front of the engine I would think possibly the chain tensioner for the timing chain, but since its in the back lifters make the most sense.


Thanks on the VEMS setup. I don't really have anywhere all the information is complied, but I'm more than happy to answer any questions.

In short I used the factory engine harness and cut off the Motronic connector and put the correct pins to the correct place in the VEMS connectors. I think thats the easiest way to do the wiring.

I'm hesitating on showing my configuration until I know 100% its correct. Right now I'm about 98% :)