Swap 1/4 Mile Thread

[JGood]

Is there really that big of a difference between the M50NV and the M50 vanos? Is it safe to say M50 non vano's are capable of mid 14's?

They don't have variable valve timing to give them low end torque, but they have hotter cams that help them pull up top. It's a noticeable difference from what I've seen. A buddy of mine swapped his m50NV for an m50tu, and on the highway in the upper RPM's, it didn't have as much power. This was verified with some side by side runs with my car, before and after.

IMO, I'd think a non vanos could be faster in the 1/4. The only time you're out of the power band is when you launch, and e30 m50's have enough traction issues in 1st to not need more power at that point.

Does anyone have a non-vanos dyno plot? I don't think I've ever seen one.

[SamE30e]

I just rebuilt my M50 with arp studs and 19lbs injectors and am going to get a W.A.R chip and run the Miller 19lbs tune. I'm hoping for mid 14's at least.

[justin_l_]

Anybody run yet this spring/summer?

[JGood]

Anybody run yet this spring/summer?

I've been trying to get to the track now that I did m3 cams/software. Previous best was 14.4@94 with my chipped m50. Hoping for 14.2@97 or so now. Hopefully I can get to the track in the next few weeks.

[Jean]

Not a 24v but fun to compare anyway. First time out with the car.

m30b35/g260.6/s3.46/225 45 16 fk452 street tires.

14.748 @ 97.275
60ft was 2.130
reaction (not that it matters) 0.220

I'll go out again in a week or so and try again with different tires/suspension setup.

[IanS_in_Oz]

My M52B2.8 swap in '84 E30. Only mod is the M50 manifold.
Has a CR dogleg box, and 4.1 LSD. 14.42 at 98.7 mph

[skatebline]

Alright i hope to see some feed back on this..... Im not to sure on how good or not i ran.
The car - 86 325es

Mods-
m50 Swap
m20 325e trans
m20 clutch and flywheel
325e diff (2.93)
Precision turbo 5862 billet wheel
m50 100% stock no head studs or head gasket
666 fab manifold
small FMIC
custom charge pipes
3'' turbo back exhaust
TRM Draw thru chip tune
7-8psi around 290whp

ET 1/4 mile 13.6 @106
with street tires.
I had no boost built up for the launch just dump the clutch and go, had wheel hop like a bitch

I only did 2 laps down the track and im just learning how to launch the car....

[JGood]

Alright i hope to see some feed back on this..... Im not to sure on how good or not i ran.
The car - 86 325es

Mods-
m50 Swap
m20 325e trans
m20 clutch and flywheel
325e diff (2.93)
Precision turbo 5862 billet wheel
m50 100% stock no head studs or head gasket
666 fab manifold
small FMIC
custom charge pipes
3'' turbo back exhaust
TRM Draw thru chip tune
7-8psi around 290whp

ET 1/4 mile 13.6 @106
with street tires.

I only did 2 laps down the track and im just learning how to launch the car....

Seems about right, trap speed looks pretty good, but obviously you weren't hooking up the greatest.

7-8psi gets you 290whp? That's nice. I'd love to turbo mine. I wonder what s50 cams would do for you...

[skatebline]

Yeah i need to practice alot more on hookin that suker up.

Yeah i was wondering the same thing. i would like to put those in and see but if i take off the head im gunna do alot more work to the head like cams, springs, port polish, studs gasket and DR vanos.

but yeah 7psi got me 260whp on a base tune from TRM and then sent them the dyno number and got a chip back and they said they could see 280 or 290 to the wheels easily

[IanS_in_Oz]

Took the E30 2.8 out again, and went quicker:

[George77]

They don't have variable valve timing to give them low end torque, but they have hotter cams that help them pull up top. It's a noticeable difference from what I've seen. A buddy of mine swapped his m50NV for an m50tu, and on the highway in the upper RPM's, it didn't have as much power. This was verified with some side by side runs with my car, before and after.

IMO, I'd think a non vanos could be faster in the 1/4. The only time you're out of the power band is when you launch, and e30 m50's have enough traction issues in 1st to not need more power at that point.

Does anyone have a non-vanos dyno plot? I don't think I've ever seen one.

Here is my dyno graph.It's a m50 non vanos, 2851cc, 9.5 CR with ebay m50 turbo bottom mount manifold, crappy down pipe and stock m20 exhaust,this was used just to brake in the engine.The head has a little work done but nothing special.I had to advance the timing due to lower CR.The picture its not that clear,but the car made 187 Hp and 194 Torqe

[Wh33lhop]

Has a CR dogleg box, and 4.1 LSD.

Jesus, you like your gearing short.

[IanS_in_Oz]

Jesus, you like your gearing short.

Sorry, LSD has been changed to 3.46 now. Muchos betterer... :)

[justin_l_]

Alright i hope to see some feed back on this..... Im not to sure on how good or not i ran.
The car - 86 325es

Mods-
m50 Swap
m20 325e trans
m20 clutch and flywheel
325e diff (2.93)
Precision turbo 5862 billet wheel
m50 100% stock no head studs or head gasket
666 fab manifold
small FMIC
custom charge pipes
3'' turbo back exhaust
TRM Draw thru chip tune
7-8psi around 290whp

ET 1/4 mile 13.6 @106
with street tires.
I had no boost built up for the launch just dump the clutch and go, had wheel hop like a bitch

I only did 2 laps down the track and im just learning how to launch the car....

IMHO I think you should be able to get low 13's with some practice and break into the 12's with some sticky tires. What were you 60ft's?

[skatebline]

IMHO I think you should be able to get low 13's with some practice and break into the 12's with some sticky tires. What were you 60ft's?

Yeah thats what i was hoping to do was just break 12's but now im going to barrow a friends set of stickys and im putting in a 3.93 m5 dif right as we speak. but the 60's were around 2.4