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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 05-07-2013, 05:42 PM   #1
ThatGuy_JZ
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Dyno'd the 325Ci the other day.

A local meet this past weekend was doing dyno pulls for only $20... so I figured why not. I've had the car dyno'd before about 4 years ago when I first got it bone stock with only a K&N filter on a Mustang Dyno and it put down 161hp.

Current performance mods are a custom after axle Y-pipe into a 3" Vibrant muffler, K&N Typhoon intake, UUC pulleys, Besian Systems Vanos Seals, 3.46 auto diff swap, and regular maintenance. The car currently has 112k miles. It managed to put down 165whp.

While it's not fast by any means, I'm pretty happy with those numbers and that it's still consistent with the power it put down years back. I've attached the printout below.



One thing I saw while I was there that really blew my mind was another guy with a 325Ci with I think he said 187k on the clock and 19" rims. In talking with him he said he only had an intake, exhaust, and 'Dinan Stage 3' ecu. I watched the car run on the dyno and it showed he put down 248whp. 248whp. I didn't hear any kind of forced induction, nor did I see any under the hood (looked stock minus intake), and I saw the run and printout myself and it was all legit. Had I not seen it with my own eyes I wouldn't believe it. After his run, a 330i ran and did around 186whp, then an E36 M3 ran and did 197whp, then I ran, and all those numbers were fairly consistent with the motor's rated power. How the hell would 248whp even be possible on an NA 325Ci when guys on here with 330's sporting headers, cams, and all the bolt-on's struggle to move near or past 225whp? The only thing I can think of is the dyno screwed up or was thrown off by the wheels or something, or he's got some kind of secret FI/NO2 setup going on that he's not talking about. He mentioned he was surprised it only put down 248 and he was really hoping for more than that.
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Old 05-07-2013, 08:11 PM   #2
330i4me
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If you watched the dyno run on that guys car and the motor revved out really quick, he definately hit it with a shot of nitrous
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Old 05-07-2013, 08:54 PM   #3
///Mvious
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I hate I missed it...that was at the EuroEnvy grand opening huh? The place look nice?

Nice looking Steel Blue btw!

248whp - no chance w/o FI or NO2
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Old 05-07-2013, 10:30 PM   #4
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Quote:
Originally Posted by RBbimmer View Post
248whp - no chance w/o FI or NO2
This^

Literally impossible on a 325 to make that power NA ever. You can hit 200whp NA (maybe squeeze a lil bit more pending on motor health) on a 325 with full bolt-ons/NA mods and a dyno tune. (cams, headers, exhaust, intake, tune)

He had to of had some kind of FI or a shot of nitrous.
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Old 05-07-2013, 10:47 PM   #5
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If it looked all stock........

He has a well hidden nitrous system, plain and simple.


Nitrous !
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Old 05-08-2013, 12:07 PM   #6
ThatGuy_JZ
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Thanks everyone.

Yeah RBbimmer, it was the EuroEnvy meet. I had a good time and everyone there was pretty cool.

In regards to the other guy's dyno, I'm not trying to flame him or anything, he's a cool guy and all, I just couldn't wrap my head around those numbers.
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Old 05-08-2013, 01:20 PM   #7
lamsv
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Nice curve you got there. No big dips in the power at all! Just another reason why I love the BMW I6... That smooth powerband.
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Old 05-08-2013, 09:19 PM   #8
///Mvious
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Quote:
Originally Posted by ThatGuy_JZ View Post
Thanks everyone.

Yeah RBbimmer, it was the EuroEnvy meet. I had a good time and everyone there was pretty cool.

In regards to the other guy's dyno, I'm not trying to flame him or anything, he's a cool guy and all, I just couldn't wrap my head around those numbers.
Good to hear...I do want to check them out sometime, but its a bit of a hike from Fort Mill! The owner comes to the NC BMWCCA meetings...seems like a good guy.

You ever at Cars & Coffee in CLT? I missed the last couple, but good time and there are a few E46s
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Old 05-08-2013, 10:15 PM   #9
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Yeah I've been to the last few C&C meets, always a good time. It was real cold at the last one and there was still a good turnout. Lots of nice cars out there.

lamsv - thanks man!
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Old 05-08-2013, 10:24 PM   #10
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Dyno'd the 325Ci the other day.

just curious...u said that he put stage 3 dinan computer right ? maybe thats the point...because if you get the right formula, you can get high output hp..let say he combine his part really good..intake+exhaust+dinan tune...


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Old 05-09-2013, 05:44 AM   #11
///Mvious
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just curious...u said that he put stage 3 dinan computer right ? maybe thats the point...because if you get the right formula, you can get high output hp..let say he combine his part really good..intake+exhaust+dinan tune...


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You can see here what the M54B25's are making...http://forum.e46fanatics.com/showthread.php?t=768715
A tune doesn't do much for our cars in N/A form...they come pretty well tuned from the factory... with those said mods, I'd be impressed with 175 whp!
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Old 05-10-2013, 09:53 PM   #12
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Is it a stroke up engine still considered as NA? Friend of mine just stroke up rom 325 to 330 by replacing stock crank , conrod and piston from 330i. Add dastek unichip , little bit tune and dyno'ed to get 240hp

I own a 325i 2001 with dastek + throttle response kit , last time dyno'ed got 200hp .. I'm looking forward to stroke up to 3000 , it gain quite a lot might be coz before I bought the car (2011) , with only 40k km on cluster, it had been used only to drive home and school since 2001. The ecu might "learn" the behaviour for that long.

The feel after dastek installation is like driving another car, really....it more responsive...
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File Type: pdf Rev Engineering 002.pdf (255.3 KB, 19 views)
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Old 05-10-2013, 11:03 PM   #13
indoafro
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Dyno'd the 325Ci the other day.

Quote:
Originally Posted by Prihadi View Post
Is it a stroke up engine still considered as NA? Friend of mine just stroke up rom 325 to 330 by replacing stock crank , conrod and piston from 330i. Add dastek unichip , little bit tune and dyno'ed to get 240hp

I own a 325i 2001 with dastek + throttle response kit , last time dyno'ed got 200hp .. I'm looking forward to stroke up to 3000 , it gain quite a lot might be coz before I bought the car (2011) , with only 40k km on cluster, it had been used only to drive home and school since 2001. The ecu might "learn" the behaviour for that long.

The feel after dastek installation is like driving another car, really....it more responsive...
yess sir, its still NA...what is throttle set up kit ? have you ever try a 6throttle ? (its like 6 barrel carb but its for injection engine)


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Old 05-10-2013, 11:07 PM   #14
indoafro
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Dyno'd the 325Ci the other day.

Quote:
Originally Posted by RBbimmer View Post
You can see here what the M54B25's are making...http://forum.e46fanatics.com/showthread.php?t=768715
A tune doesn't do much for our cars in N/A form...they come pretty well tuned from the factory... with those said mods, I'd be impressed with 175 whp!
man, i believe it can be more than that...because i used to "playing" with 4 (straight) NA...and i can make arround 150hp (on wheel)...i believe bmw engine can make arround 250 hp on wheel...let say if you put dastek+software+do some research on exhaust piping+either slap the head/change the pistons into highcomp...


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Old 05-11-2013, 09:09 AM   #15
///Mvious
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man, i believe it can be more than that...because i used to "playing" with 4 (straight) NA...and i can make arround 150hp (on wheel)...i believe bmw engine can make arround 250 hp on wheel...let say if you put dastek+software+do some research on exhaust piping+either slap the head/change the pistons into highcomp...


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Believe more than what? What the guys are putting down on that dyno thread or more than 175 whp w/intake+tune+exhaust (the guys said mods)? I wasn't implying that thread holds the limit of what the B25 is capable of, but was just referencing a good source for what has been attained with listed mods....250 whp out of a N/A M54B25?...Sure, with a high $$/labor motor build...but not with just bolt-ons and a tune
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Old 05-11-2013, 10:12 AM   #16
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Dyno'd the 325Ci the other day.

ah sorry dude, i was miss understanding.....


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Old 05-11-2013, 12:44 PM   #17
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What am I missing here? Awesome numbers.
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Old 05-11-2013, 02:20 PM   #18
alex230ro
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Quote:
Originally Posted by Prihadi View Post
Is it a stroke up engine still considered as NA? Friend of mine just stroke up rom 325 to 330 by replacing stock crank , conrod and piston from 330i. Add dastek unichip , little bit tune and dyno'ed to get 240hp

I own a 325i 2001 with dastek + throttle response kit , last time dyno'ed got 200hp .. I'm looking forward to stroke up to 3000 , it gain quite a lot might be coz before I bought the car (2011) , with only 40k km on cluster, it had been used only to drive home and school since 2001. The ecu might "learn" the behaviour for that long.

The feel after dastek installation is like driving another car, really....it more responsive...
i belive in this topic it all about the power at wheel,and you are refering about engine power at flywheel.
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Old 05-13-2013, 04:43 AM   #19
Prihadi
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@Indoafro: the throttle kit i mean is a module installed on the pedal to get rid the delay when you step on the gas pedal untilnthe engine respon. I'm interested for 6 barrel carb for injection machine, where can I find it?

@alex230rp: when I did the dyno I think its on wheel (the car is running on a running barrels)...cmiiw, as for at flywheel dyno you will need put the dyno directly to the engine, isn't it? please advice...
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Old 05-13-2013, 05:01 AM   #20
indoafro
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Quote:
Originally Posted by Prihadi View Post
@Indoafro: the throttle kit i mean is a module installed on the pedal to get rid the delay when you step on the gas pedal untilnthe engine respon. I'm interested for 6 barrel carb for injection machine, where can I find it?

@alex230rp: when I did the dyno I think its on wheel (the car is running on a running barrels)...cmiiw, as for at flywheel dyno you will need put the dyno directly to the engine, isn't it? please advice...
you can search "multi throttle" or "individual throttle kit"...


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