M50 NV head to M52 block issues!

[Uber E30]

Just for good measure:



Notice the same PN for the trays and head??!?! OMG amazing!

the S52, S50, M52, and M50TU all use the same head. The M50 NV uses the same head casting, but different valves.
The M50TU, M52, S50, and S52 all use the same valves, but different springs and cams.

[416stroker]

Not to mention the hundreds of posts that say you cant put m3 cams in a NV, you can only hotcam with another NV cam.

Would you happen to know why? I do.

Valves dont matter.

Scince the trays are different do people swap them when they put s50 cams in a m50tu?

[Uber E30]

Would you happen to know why? I do.

Please oh wise one who knows more than real OEM, show me a running NV with s5x cams.

[So Live]

OOH YAY!!! One of these threads.

Im running a 1996 M52 Cylinder head. Im running a "hot cam" NV set up (cams/trays/lifters) with no issues. Compression is spot on for the headgasket im using. I pull 21.5 inches mercury at idle. No extra valve train noise. Runs perfect. Probably about 1000 miles on the set up so far. Revving to 7100rpm every chance i get.

And your vanos unit will not bolt up to a NV head, the casting is a little different and you have to grind a 1/4 inch off in one spot to get it to fit.

And ill get you some dyno graphs this weekend or next weekend!! Do you need pictures of the head casting/pn and the cams inside it too?

[e30polak]

OOH YAY!!! One of these threads.

Im running a 1996 M52 Cylinder head. Im running a "hot cam" NV set up (cams/trays/lifters) with no issues. Compression is spot on for the headgasket im using. I pull 21.5 inches mercury at idle. No extra valve train noise. Runs perfect. Probably about 1000 miles on the set up so far. Revving to 7100rpm every chance i get.

And your vanos unit will not bolt up to a NV head, the casting is a little different and you have to grind a 1/4 inch off in one spot to get it to fit.

And ill get you some dyno graphs this weekend or next weekend!! Do you need pictures of the head casting/pn and the cams inside it too?

I'm following your build Chris, I can't wait to see the vids! :twisted:

[So Live]

Thanks dude! Cant wait to get it properly tuned :D

[Manuts]

OOH YAY!!! One of these threads.

Im running a 1996 M52 Cylinder head. Im running a "hot cam" NV set up (cams/trays/lifters) with no issues. Compression is spot on for the headgasket im using. I pull 21.5 inches mercury at idle. No extra valve train noise. Runs perfect. Probably about 1000 miles on the set up so far. Revving to 7100rpm every chance i get.

And your vanos unit will not bolt up to a NV head, the casting is a little different and you have to grind a 1/4 inch off in one spot to get it to fit.

And ill get you some dyno graphs this weekend or next weekend!! Do you need pictures of the head casting/pn and the cams inside it too?

Yeah i had to grind down the right side a few mm to get the vanos unit to bolt onto the NV head. So what are my options for this NV head? Can i put vanos cams onto the NV trays and lifters? What about M52 cams/trays /lifter into the NV head? Right now i have M52 cams on m50 NV trays and lifters and its losing compression through the valves. TIA

[Uber E30]

Do you need pictures of the head casting/pn and the cams inside it too?

Um no, you're backwards of what i said.

i have M52 cams on m50 NV trays and lifters and its losing compression through the valves. TIA

gee i wonder why?!?!?

the S52, S50, M52, and M50TU all use the same head. The M50 NV uses the same head casting, but different valves.
The M50TU, M52, S50, and S52 all use the same valves, but different springs and cams.

[Manuts]

So what cams trays and lifter are compatible with the NV valves to use in a M52 block? I already bolted the head to the block with a new head gasket so i dont want to take the head off to swap out valves. TIA

[SamE30e]

Actually this quite isnt true. s50, m52, and s52 all have the same trays. m50's are the only ones that have different trays.

Also m52 cams/trays can NOT go into a NV head, nor can m3 cams like suggested above. You also cant convert a NV head to work with vanos...

You can though put a S50 Exhaust cam into the NV intake side using the S50 trays, lifters and cams.

[Manuts]

You can though put a S50 Exhaust cam into the NV intake side using the S50 trays, lifters and cams.

Cant i just put it m50 vanos cams onto the non vanos trays and lifter? Realoem lists the trays for the m50 vanos and m50 non vanos to be the same.

[Uber E30]

You can though put a S50 Exhaust cam into the NV intake side using the S50 trays, lifters and cams.

I dont think you can, i was pretty sure you just hotcamed with a NV exhaust cam. Anyone verify either way?

[416stroker]

Cant i just put it m50 vanos cams onto the non vanos trays and lifter? Realoem lists the trays for the m50 vanos and m50 non vanos to be the same.

Should work

I dont think you can, i was pretty sure you just hotcamed with a NV exhaust cam. Anyone verify either way?

Its been done.

If you want to change to vanos you have to use all the timing gears from the vanos and lock the vanos if you dont want to convert all the way and tray I guess?

[Uber E30]

someone besides him

[416stroker]

someone besides him

All exaust cams are the same. The only difference is this
Vanos Intake cam


Vanos intake and exaust



Non vanos cams



Non vanos intakes have the same flange in the front as the exaust and vanos doesnt.

Some one on here ran a s50 exaust cam in a non vanos Ill have to look for it.


And Im not tring to argue with you.