m50nv stroker/Schrick cam question

[FreedS4]

For those of you that have built an m50 stroker motor or who run nv Schrick cams (or both!), what tuning software do you run?

Chris

[AnimalE30]

My brother is building a Frankensteinmotor (M50 block, m54 rotating assembly) and he was able to get a tune with all the options he wanted from TRM. He is still building his motor so I cant say how well it works.

I will also be running a TRM tune for my S50 with schricks. Again, setup isn't done so I cant say how well it works, but with the success everyone else here and bimmerfourms has with TRM I dont have a doubt that the tune will work well. That being said, $495 for my NA tune will be a big chunk of change (Im ticking all the options: 24# injectors, 3.5 maf, Schricks).

Just send them an email with your set up and they should be able to hook it up for you!

http://www.racersmarket.net/

[FreedS4]

My brother is building a Frankensteinmotor (M50 block, m54 rotating assembly) and he was able to get a tune with all the options he wanted from TRM. He is still building his motor so I cant say how well it works.

I will also be running a TRM tune for my S50 with schricks. Again, setup isn't done so I cant say how well it works, but with the success everyone else here and bimmerfourms has with TRM I dont have a doubt that the tune will work well. That being said, $495 for my NA tune will be a big chunk of change (Im ticking all the options: 24# injectors, 3.5 maf, Schricks).

Just send them an email with your set up and they should be able to hook it up for you!

http://www.racersmarket.net/

I had planned on running a TRM tune, as well, but unfortunately they don't sell NV tunes. So that is why I'm curious to see what everyone with a m50nv stroker build is doing. I'd be fine if I had VaNoS, but I don't so I'm trying to get a feel for what options I have.

Chris

[FreedS4]

As far as I can tell, my only option is either running MegaSquirt or using the W.A.R. chip. Until I do a bit more research, I'm going to just run the stock DME. I know that it won't run perfectly on a stock tune, but it'll definitely get the job done.

[AnimalE30]

As far as I can tell, my only option is either running MegaSquirt or using the W.A.R. chip. Until I do a bit more research, I'm going to just run the stock DME. I know that it won't run perfectly on a stock tune, but it'll definitely get the job done.

My bad Freed, had no idea they didn't have NV tunes. Any reason you have to go with NV?

[Paradox]

interesting...I'm building the same thing. I've read the turner will do custom chips, except I don't know if that includes the non vanos DME's They do carry a chip for the non vanos DME so maybe its worth an email.

http://www.turnermotorsport.com/BMW-E34/c-70-bmw-performance-chips-1985-1995-cars.aspx

[FreedS4]

My bad Freed, had no idea they didn't have NV tunes. Any reason you have to go with NV?

Found a steal of a deal on a nv motor, so I bought it. And I like the simplicity of the nv and the beefier head.

interesting...I'm building the same thing. I've read the turner will do custom chips, except I don't know if that includes the non vanos DME's They do carry a chip for the non vanos DME so maybe its worth an email.

http://www.turnermotorsport.com/BMW-...1995-cars.aspx

I'll have to check it and give them a call. Thanks for the link!

Chris

[328ijunkie]

You can easily convert the NV head to run vanos... Tons of people do and it will open up your tuning options... as well as having the engine run on a little bit better electronics system.

[amcink]

You can easily convert the NV head to run vanos... Tons of people do and it will open up your tuning options... as well as having the engine run on a little bit better electronics system.

What parts do I need to do this I have a none vanos engine now

[FreedS4]

You can easily convert the NV head to run vanos... Tons of people do and it will open up your tuning options... as well as having the engine run on a little bit better electronics system.

That wouldn't allow me to run my Schrick cams...ergo, not a good option. I'll just find someone with a NV tuning option.

Chris

[Wanganstyle]

That wouldn't allow me to run my Schrick cams...ergo, not a good option. I'll just find someone with a NV tuning option.

Chris

Why not??

Upgrading brains is good; if you are a vanos hater you can still hate and not run vanos with vanos brains.

The OBD1 and OBD2 vanos DME and harness will fit right on; you don't have to connect the vanos solinoid for the car to run- as your engine is non vanos and you don't have one.

Tune the NV with cams of choice and smarter vanos brains. It will get smarter (ala wizard of oz scarecrow) and also gain knock sensors for durability. The NV engine has a more robust valvetrain (larger diameter lifters and dual valve springs and heavier 7mm valvestems) but does not have the ability to increase timing to knock threshold as the engine electronic system is designed with no knock sensor circuit. the M50 NV has very heavy rods and pistons as a band aid to the lack of knock feedback design; the S52/M52 engines are known to be even stronger internally when high pressure turbocharged and they do not have the overly heavy pistons or rods of the M50 NV.

BMW re-designed the rotating assembly to be much lighter when the knock sensor technology was released in the 413 bosch DME's

Knock will be an increased issue for one installing camshafts into a NV engine with original 402 DME - even more so for a pump gas street car.

Adding an aggressive tune and aggressive camshafts to a NV 402 DME no knock sensor situation is a disadvantage to the engine reliability and tuning end result; with a knock sensor system the ignition can automatically retard to protect the engine in case of knock.

My 1992 525i-5mt with the Original BMW M50NV 402 DME would occasionally knock on high load hills (San Francisco); This was with the OEM chip OEM engine and OEM camshafts as shipped from the BMW factory. If one is using an aftermarket cam set the torque range will be pushed higher in the RPM range and potential for knocking will increase as more cylinder pressure (tps %) will be required to flow air at lower speeds with high load (hills).


I've installed a built M50 NV cylinder head into a e36 M3 before and retained the vanos. I did try driving the OBD2 s52 original car with vanos disconnected and it was smoother running than my e34 525i-5 Non vanos original car.