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View Full Version : E46 M3 Baseline Dyno Run


KJ-M3
06-29-2003, 05:29 PM
I just dyno'ed my BONE STOCK E46 M3 on Friday and was very pleased with the results.

Most E46 M3's dyno to an average of 270whp with a range between 260whp and 290whp (290whp is very rare).

I was lucky enough to have one of the strong M3's and dyno'ed to 287.1whp.

http://members.roadfly.com/kj-typer/M3%20Baseline%20-%20KJ.jpg

After the dyno run, I installed the Jim Conforti Shark Injector (Thanks to Alex @ Teutonic.ca) and will run the car again after the long weekend. I'm hoping for 293+ whp.

- KJ

Bavaria
06-29-2003, 05:31 PM
HUH!!!! isnt is supposed to be 300+ HP???? like 333???? wtf?

Bavaria
06-29-2003, 05:33 PM
and here is a link..........
http://www.supercars.net/cars/2000@$BMW@$E46%20M3g.html

330DTM
06-29-2003, 05:35 PM
Originally posted by Bavaria
HUH!!!! isnt is supposed to be 300+ HP???? like 333???? wtf?

Dude, dyno figures are usually based on wheel horsepower.

What's advertised, i.e. 333hp is @ the crank *th-up*

Bavaria
06-29-2003, 05:38 PM
Oh ok, my bad...now i know i guess
thanks Bud

KJ-M3
06-29-2003, 06:16 PM
Originally posted by Bavaria
Oh ok, my bad...now i know i guess
thanks Bud

Hahaha!

FYI, using the "average" of 270whp (whp = HP at the wheels) that most M3 owners get equates to:

270whp/333 hp = 0.81081
This shows a 18.9189% drive train loss.

Since I got 287.1whp vs. the average of 270whp, the following calculations shows much much HP I have at the Crank (i.e. advertised HP).

Therefore:
287.1whp/0.81081 = 354.09 HP at the crank for my car. That's over 21HP more than advertised by BMW.

Cheers,
KJ

Rolled_Out
06-29-2003, 06:59 PM
Thats interesting, the dyno runs i saw from 3 bone stock E46M3's, the lowest one was 284whp and the highest being 292 whp..
hmmm..

Soldo
06-29-2003, 07:16 PM
see, thats what i love, i've noticed that all these car companies advertise such HIGH hp numbers but when BMW comes out with a MONSTER they always seem to underate the car!!

KJ-M3
06-29-2003, 09:56 PM
Originally posted by Rolled_Out
Thats interesting, the dyno runs i saw from 3 bone stock E46M3's, the lowest one was 284whp and the highest being 292 whp..
hmmm..

If you frequent all the E46 M3 boards, the results (from a much larger sample size) are quite different from what you've seen.

Cheers,
KJ

Gamite
06-29-2003, 09:59 PM
just outa curiosity, is your car SMG or 6 spd?

KJ-M3
06-30-2003, 12:12 AM
Originally posted by Gamite
just outa curiosity, is your car SMG or 6 spd?

Mine is a 6-speed, but both should pull the same on the dyno.

Bigbore
06-30-2003, 01:47 AM
those are wicked numbers!

but drivetrain loss is not measured in percentage, well you can get a number from it, but the percent of loss doesnt run parallel to hp gains... in other words, if you run 450hp outta your M3 your not going to lose 18percent, you may only lose about 12...

the numbers dont stay propotional, as it`s loss of power due to friction, and the base friction is the same (tranny gears, pistons, rods etc..) while things like heat are the only other variables, which will slow down the car.

So bascially the more power you put out the more influence it has to the whp figure.

330DTM
06-30-2003, 04:26 AM
Originally posted by Rolled_Out
Thats interesting, the dyno runs i saw from 3 bone stock E46M3's, the lowest one was 284whp and the highest being 292 whp..
hmmm..

There's somethings that you have to take into factor.

Was it dynoed using a Dynojet or Mustang dyno. Those will give you difference numbers. I believe Dynojets usually present higher numbers than mustang dynos or vice versa.

There's even chassis dyno's (or whatever you call it) where it mounts onto your wheel hub rather than the wheels placed onto a roller.

KJ-M3
07-02-2003, 02:37 PM
Originally posted by 328DTM
There's somethings that you have to take into factor.

Was it dynoed using a Dynojet or Mustang dyno. Those will give you difference numbers. I believe Dynojets usually present higher numbers than mustang dynos or vice versa.

There's even chassis dyno's (or whatever you call it) where it mounts onto your wheel hub rather than the wheels placed onto a roller.

Most runs on the net were from a Dynojet. My runs were also done on a Dynojet. I believe Mustang Dyno's usually present HIGHER numbers than Dynojet.

- KJ

NoSoup4U
07-03-2003, 04:53 PM
No, a mustang dyno presents a load and theoretically will give lower numbers. HP numbers mean jack crap IMHO ... there's to many damn ways to manipulate a dyno machine, dyno software, etc. Trust me, all of us force inducted bimmer owners argue over this fact day and night.

Some have even gone as far as stating that dynojets and mustang dyno's will yield similar numbers. For instance, a baseline my friend took was within 3 rwhp on a mustang vs. a dynojet. Other factors come into play such as humidity, temperature, etc... now you know SAE corrects for this; BUT, it STILL affects your run (e.g., the ambient weather that day).

Thus, HP numbers mean crap ... if you do upgrades, visit the same dyno machine to measure your increase or decrease, hehe..
I would only start worrying if geo metro's started pulling your ass ... hehe.

The only thing I find disappointing is the HP curve, it's relatively linear like a supercharger. To bad it is not flatter ... to maintain good power, you need to be at 6500+ rpms ...