M50NV Turbo Tune Options?

[5Toes]

Non vanos heads have 1mm thicker valve stems and less to go wrong.

[Rowleym]

Thanks for the info man. I'm excited for this. You have any good info on a super cheap manifold setup? Of course it has to work well. Why not just do a cast manifold? I can make custom motor mounts if that is an issue..

[Cyrix2k]

The nonvanos head is far better on paper for boost though?

huh? not as far as I know. Most people run them because they come stock with a more aggressive cam profile and are easier to run on a standalone. A well tuned vanos motor will spool earlier and produce more power, all else being equal.

[5Toes]

The nonvanos head is far better on paper for boost though?

[Cyrix2k]

Could I use my wasted spark setup on an m50? I'm pretty sure they use COP ignition and my megasquirt isn't able to do that.

Yes, just pull the M50 coils off and run spark plug wires. I run a wasted spark setup with GM coils on my turbo M50NV. You can modify the megasquirt to run the BMW coils too, whichever you prefer. The BMW coils look cleaner but I don't think there's much performance benefit.

[Rowleym]

Upconvert to a 413/Vanos setup. Youll be glad you did. Boost+Vanos=Better

But wouldn't I have to ditch my megasquirt then? I already have like 500$ invested into megasquirt.

[Rowleym]

Could I use my wasted spark setup on an m50? I'm pretty sure they use COP ignition and my megasquirt isn't able to do that.

[Cyrix2k]

Well I'm using ms2 with wasted spark. So I'm thinking, just cut the shit out of the old m20 harness and make it fit the m50 engine. Deal. This should be fun. Wait. For wasted spark, do I need cam or crank sensor?

you need the crank sensor only.

[328ijunkie]

Upconvert to a 413/Vanos setup. Youll be glad you did. Boost+Vanos=Better

[Rowleym]

It depends on what version of MS you run. If you're on an M20 now or MS2 or earlier, it's batch fire so you only need a crank, tps, coolant temp, and air temp signals + fuel injectors & spark to fire the motor. Also the main & fuel pump relays but that's more or less independent of the motor as is the wideband. If you use the e36 harness, there are a LOT of unused wires.

Well I'm using ms2 with wasted spark. So I'm thinking, just cut the shit out of the old m20 harness and make it fit the m50 engine. Deal. This should be fun. Wait. For wasted spark, do I need cam or crank sensor?

[Cyrix2k]

It depends on what version of MS you run. If you're on an M20 now or MS2 or earlier, it's batch fire so you only need a crank, tps, coolant temp, and air temp signals + fuel injectors & spark to fire the motor. Also the main & fuel pump relays but that's more or less independent of the motor as is the wideband. If you use the e36 harness, there are a LOT of unused wires.

[Rowleym]

Is that seriously all I would need? That would be fantastic. I'm trying to make my harness as simple as possible, and cut all the other shit out to make it clean. About as race car as it get, except for keeping heat and windshield wipers.

[Cyrix2k]

^ No

You're going to need some explanation there. The crank sensor plugs right in, fuel injectors need light modification, the TPS should plug in or have already been modified, and I think the temp sensors plug in.

[Cyrix2k]

Okay so I have an m20 currently, and I am going turbo. I have the DIYPNP, and it connects to a 55 pin Bosch harness. I might be swapping a m50nv in soon because I got a crazy deal on it. Can I use that harness on the m50? Thanks. Sorry for the thread jack man. Haha

I'm sure you can adapt it with a little effort. Shouldn't take too much work.

[sayed ali]

^ No