M50 and M52 guys... HP#s

[nes85er]

You need to go OBD1. to start tweaking.

well i dont want to do major changes trent. i understand that for the best major tweaks, and therefore gains, OBDI is the way to go. yup. My goal though is to have the OBDII setup be tweaked as best as a OBDII can be set up. that is all.

[SchnellerVert]

Why, it is more constrictive and numbers robbing. It's not hard from all the info I have read concerning this. Most of the parts you could garner at a good yard.

[tonytony]

i have yet to dyno my car but i run neck and neck with a 330ci on the hwy. m50nv g260 3.73

[PiercedE30]

alright, with my NV M50 I am shooting for 250 rwhp.
I am going with either 11:1 pistons or s50 crank, tms shorty headers, ltw flywheel, schrick intake cam (with stock intake cam on exhaust side), 21 lbs injectors, and standalone, along with a whole bunch of blueprinting and lightening. Would it be possible for those numbers?

[Mot]

I like to know exactly what my motor is making in respect to the old one. Hence dyno'ing on the same machine at the same shop with the same dyno operator in relativly same conditions.


And how do you have a m52 running obd2 in our e30s?

[nes85er]

I like to know exactly what my motor is making in respect to the old one. Hence dyno'ing on the same machine at the same shop with the same dyno operator in relativly same conditions.


And how do you have a m52 running obd2 in our e30s?

yeah, now that i think about it, picking a good dyno is a task in itself huh? Ive been hearing some peeps getting some exaggerated/inaccurate readings on some dynos.


lol how? pretty much installing everything of the obdII system.:grin:

[1990m3]

yeah, now that i think about it, picking a good dyno is a task in itself huh? Ive been hearing some peeps getting some exaggerated/inaccurate readings on some dynos.


lol how? pretty much installing everything of the obdII system.:grin:

Doesn't really matter which dyno you choose as long as you continue to use the same one. You can eliminate a lot of variables that way.

[jrez]

I don't know what the numbers are for mine right now, but it still slowly pulls away from a friends bullydog reprogrammed powerstroke turbodiesel.
He'd been bugging me forever for a race, so we finally did. He was impressed, as he usually blows most away. Only other car(he said) that had given problems was a chrysler hemi.
Thats with the vanos inop, as I still have'nt fixed it . Even without, its still fun.
He wants a rematch, this time with his new AWD Infinity. Dont know the hp #'s, but I believe 300+.
I cant wait for when I install the schricks, OBD1 intake, and fix the vanos.:D

[trent]

hey john...good to see you are still around...haven't seen ya in a while :) What is wrong with your vanos?

What Shricks are you going ot be running? Schricks for an S50/S52? I always heard they don't fit, as the 2.8 doesn't have large valve pocket cutouts on the pistons. :( I was going to run these in mine but couldn't :(

[Mot]

I was just gonna reprogram my AA chip and run s52 cams. Seems like all the rage on Bf.C and a nice 20whp+ gain.


Why did you guys run obd2? It seems to make alot more sense to convert back to OBD1 if your gonna have the motor out.. Makes alot of things easier imo.

[jrez]

I've been real busy with work since summer and have'nt spent much time doing anything BMW.:(
The cams are Schrick's version of the factory S52 bumpsticks. I think they're 273's, but I have'nt looked at them since I bought(3 months ago)them.
The Vanos is "Mechanically stuck" according to the code it's giving. This also(dealer says)is also putting the engine into "default mode" due to the nature of the code.
Since I have to install the cams anyway, Im going to do it all at once. Just have to run some test's first..

As to why OBD2, speaking for myself(congrats', by the way, nes'er!!;) )I could'nt think of a good reason not to.
Nobody had actually done it, but everyone said it could'nt be done. The "higher hp" (obd1) statement was repeated again and again, but looking at what the e36 guys were getting for hp #'s it did'nt seem to hold water.
I also did'nt want to buy a complete second engine managment.

The big thing going for obd1 was/is that plenty had done it, so it would be "easier" on that point alone, as there was lotsa people who'd done it.
The tuning options have also now changed, with a decnet number of choices out there from when I began.

To each there own, but it's nice to see another one up and running.

[trent]

Jon, ah, yea, i didn't want to run those small little Schricks :) VANOS mechanically stuck can be a few different things. I don't think the OBD1/OBD2 power thing really starts working until you do some more mods, since the OBD1 is generally easier to tune.

[jrez]

I just want something that makes power all the way to redline. Torque is good up to the mid range, then goes flat. I'd like to have that for the highway.

Do you have any more to offer on what the code can mean?
I took it at face value, and reading on the net what the symptoms are, I thought for sure its inop.

Are you still looking for cams, or have you bought some? I'd be curious to see what you ended up with.

Cheers'

John

[Stu]

Mine started with an M50 block but with 86x86 bottomend pieces and M3 topend, it makes 235whp and 212wtq. 3.2 crankshafts make for 230+wtq

[MIKe30]

didnt want to start a new thread if there was this one that was similar. couple questions.

1, searched a bit, but didnt find a direct answer for this. do s50 cams work in an m52 motor? I heard the difference between the s50 and s52 cams are that the s50 cams are more agressive... true or not true?

2, may be looking to get into an obd1 aluminum m52 powered e30 with s50 cams installed, what kind of power numbers should i be expecting. my goal is to have/build a ~250whp e30... should i be looking elsewhere? I know s52's struggle to get up to there, but is this m52 gonna be far off? in all honesty i think i'd probably still be content with about 230 to the wheels - 250 is a goal.

what say you?