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E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

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Old 12-18-2012, 02:39 PM   #1
daewon774
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Question Has anyone successfully dyno'd an XI???

Just checking to see if anyone has dynoed an xi. Apparently we can press the DSC once, but can't hold down to turn off ABS and ABD-X, and CBC. How can you dyno the XI without turning these functions off, or is a single DSC press enough?
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Old 12-18-2012, 04:25 PM   #2
SamDoe1
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You need an AWD dyno or a hub dyno. Either way it's not worth it.
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Old 12-18-2012, 04:49 PM   #3
daewon774
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Quote:
Originally Posted by SamDoe1 View Post
You need an AWD dyno or a hub dyno.
Stating the obvious

Quote:
Originally Posted by SamDoe1 View Post
You need an AWD dyno or a hub dyno. Either way it's not worth it.
Why?
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2002 E46 330xi
Active Autowerke Stage I Supercharger
Magnaflow 11378 exhaust
Bilstein shocks/struts + H&R springs
Style 71s
Soon to be installed Bimmerbrakes headers + LC1...


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Old 12-21-2012, 09:15 PM   #4
xcar360
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You need an AWD dyno or a hub dyno. Either way it's not worth it.
???
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Old 12-18-2012, 08:49 PM   #5
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nope :o)
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Old 12-18-2012, 08:55 PM   #6
daewon774
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nope :o)

lol, awesome pic.

How did you set the car up? Just a single press of the DSC? What gear did you run it in?

Btw, you have a dyno graph you can post? They're so damn hard to find. I'd love to take a peek at yours
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2002 E46 330xi
Active Autowerke Stage I Supercharger
Magnaflow 11378 exhaust
Bilstein shocks/struts + H&R springs
Style 71s
Soon to be installed Bimmerbrakes headers + LC1...



Last edited by daewon774; 12-18-2012 at 09:02 PM.
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Old 12-18-2012, 09:15 PM   #7
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IIRC 255 awhp (they figured ~20% drivetrain loss because it was an awd/auto), 9 psi spraying water/meth. Car is an auto and it skewed the power numbers as they tried doing it in 4th but it kicked down to third (netting 336 tq lol) car picked up considerable power when i put headers in though. IIRC there where no dsc issues, but I wasn't there.


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Old 12-18-2012, 10:24 PM   #8
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What kit did you have on that you have water/meth?
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Old 12-18-2012, 10:39 PM   #9
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Aye.
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Old 12-18-2012, 10:44 PM   #10
daewon774
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That graph looks crazy. Is that because of the shift down from 4th to 3rd? Custom tune?

Btw what SC kit you have and which meth kit?
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2002 E46 330xi
Active Autowerke Stage I Supercharger
Magnaflow 11378 exhaust
Bilstein shocks/struts + H&R springs
Style 71s
Soon to be installed Bimmerbrakes headers + LC1...



Last edited by daewon774; 12-18-2012 at 10:45 PM.
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Old 12-19-2012, 04:05 AM   #11
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Dynojet Linx AWD:







With 5.8 PSI, No Air-Cooler.

Now i'm driving with 8.5 PSI, but no Air-Cooler and i will install a Snow-Performance-Meth-Kit. Anyone here has expirince with that?
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Old 12-19-2012, 08:30 AM   #12
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Quote:
Originally Posted by cardsfan007 View Post
What kit did you have on that you have water/meth?
Snow Performance boost dependant

Quote:
Originally Posted by daewon774 View Post
That graph looks crazy. Is that because of the shift down from 4th to 3rd? Custom tune?
Btw what SC kit you have and which meth kit?
Yeah the downshift to third made things weird, and the custom tune was done by AA, It was a second hand RMS kit that used a VORTECH blower. I went water meth to keep things cool as I couldn't fit an intercooler without some serious pipe work
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Old 12-19-2012, 03:51 PM   #13
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does the water/meth kit REALLY adds more HP or is this no gain which is able to feel ... please answer unemotional, becouse i'll buy a snow performance kit, if your answer is: it adds more, and i feel it!

The Problem with a superchargerkit, without intercooling, is the hot air which is terrible for the engine and kills all boosts-gains becouse the engine is pinging and the ecu retards the ignition ...
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Old 12-19-2012, 04:01 PM   #14
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Originally Posted by Hageee View Post
does the water/meth kit REALLY adds more HP or is this no gain which is able to feel ... please answer unemotional, becouse i'll buy a snow performance kit, if your answer is: it adds more, and i feel it!

The Problem with a superchargerkit, without intercooling, is the hot air which is terrible for the engine and kills all boosts-gains becouse the engine is pinging and the ecu retards the ignition ...
Methanol pulls heat out of the charged air when it quickly evaporates from the atomization. That, in addition to the h20 saturation slows down the fuel burn, allowing for significant amounts of increased timing, which lowers EGT, allowing for a leaner AFR and more boost before detonation occurs and the EGT comfort zone is exceeded.

So yes, it REALLY allows for more HP. It doesn't produce it alone, but allows for significant alterations to a tune which will make more power.
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Old 12-19-2012, 07:39 PM   #15
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Quote:
Originally Posted by Hageee View Post
does the water/meth kit REALLY adds more HP or is this no gain which is able to feel ... please answer unemotional, becouse i'll buy a snow performance kit, if your answer is: it adds more, and i feel it!

The Problem with a superchargerkit, without intercooling, is the hot air which is terrible for the engine and kills all boosts-gains becouse the engine is pinging and the ecu retards the ignition ...
I didn't feel anything noticeably different, but I changed to the 9psi soon after I added it. My IAT did go down from 120-150 max to 70-80 deg fah when spraying, which was pretty awesome.

btw LOVED the snow performance kit, used my windshield fluid wiper bottle as a reservoir and monitored my intake air temps (IAT) with an ODB2 reader (scangauge II)


(7 psi pulley)
Quote:
Originally Posted by Scooby24 View Post
Methanol pulls heat out of the charged air when it quickly evaporates from the atomization. That, in addition to the h20 saturation slows down the fuel burn, allowing for significant amounts of increased timing, which lowers EGT, allowing for a leaner AFR and more boost before detonation occurs and the EGT comfort zone is exceeded.

So yes, it REALLY allows for more HP. It doesn't produce it alone, but allows for significant alterations to a tune which will make more power.
ding ding ding
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Old 12-20-2012, 03:56 PM   #16
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Alright, quick update. I was told that I need to be on rollers to get a good graph. The ADB-X keeps grabbing the brakes on the Dyno Dynamics dynos. Hopefully I'll get a dyno run on a Mustang Dyno this Sat or in two weeks. I'll post up what I get...

Thanks everyone for the posts. Good to see others have put the xi on the dyno!
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2002 E46 330xi
Active Autowerke Stage I Supercharger
Magnaflow 11378 exhaust
Bilstein shocks/struts + H&R springs
Style 71s
Soon to be installed Bimmerbrakes headers + LC1...


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Old 12-22-2012, 01:22 PM   #17
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Water/Methanol squirters? Fuel burn properties altered by voodoo chemistry? Pushing more timing advance by program hackery? You guys blow me away. My engine still scares me. Anything outside the stock operating parameters may be entering the danger zone they tell us. Reading these stupid forums scares me. Less than 10 percent of owners dare to step into the twilight zone of engine modification. You see purists up here demanding to only use BMW oil or anti-freeze. They claim any alterations to our highly engineered drive-train will result in fiery explosions. Should you require dealer service, when the tech looks at your modified car you'll be shunned and ex-communicated.

You 10 percenters offer hope to all. They're just a freakin' car after all. We should all should bolt on super-chargers and spray nitro-methane into these buggers. I'll bet some of your cars scoot like a banshee. Tuner madness should be received as leading edge information not just crazy talk. Keep on with your R&D gentleman, it's sure fun to read about and ponder tweaking our own a tad.
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Old 01-05-2013, 01:36 PM   #18
daewon774
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Thumbs down

Alright guys, well here's my dyno graph. I went to Enhanced Street Performance in MA that had a Mustang dyno to skirt the differential problems I was running into on the Dyna Packs.

First thing we noticed was the AFR, it is WAY lean. I have a Active Autowerke Stage I kit on the XI and it's making good boost, but just not getting enough fuel after 4k on the RPM. I ordered a new fuel filter and fuel pump to see if this solves the problem. I'll post back when I find out more.



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2002 E46 330xi
Active Autowerke Stage I Supercharger
Magnaflow 11378 exhaust
Bilstein shocks/struts + H&R springs
Style 71s
Soon to be installed Bimmerbrakes headers + LC1...


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