S54 Dyno Database

[samthejam]

Untitled by Sam DaJam, on Flickr

Untitled by Sam DaJam, on Flickr

Untitled by Sam DaJam, on Flickr

Untitled by Sam DaJam, on Flickr


Untitled by Sam DaJam, on Flickr


143k S54

Mods are:
- Epic Alpha N Tune
-Evolve Airbox
-Megan Headers
-Stock Section 1
- Bimmerworld Street Track 3.5"

Stock pulleys, tropical E36 M3 Clutch Fan

The car is wanting to pull timing after 7k rpm, Randy was saying the IATs were pretty high. I did see the logs, and they were about 105-110 degrees on a 85 day. We pulled the headlight out and put a blower pointed at the airbox and were able to get some better numbers. So my next project will be ducting to that airbox.

He also suspects my exhaust is another restriction right now specifically the headers, but it's making enough power for me as of now.

[Nardo S54]

My Z4 M coupe has been running Epic software from day 1 but I only recently managed to find time for a custom tune. I never did a stock baseline but I know a healthy Z4 M generally dynos around ~275whp (SAE) on a Dynojet. But for purposes of this exercise, I’ll use my header tune as my baseline, which means total pickup of +40whp from airbox, x-pipe, pulleys, and flywheel. Note dyno runs were performed at same facility with ambient temps being quite similar (spring 2024 vs fall 2025).

Lastly, I recognize a more controlled framework would've entailed starting with a baseline header + custom tune but frankly, I wasn't going to pay up for an academic exercise. Ultimately, this answered the most burning questions for me while still having good relative comparison points.


Header Tune (OTS)

• Euro headers
• 100 cell hfc
• Peak 298whp / 237lb-ft

Alpha N (OTS)

Same as above plus following additions:

• TMS CSL v2
• TMS pulley
• Supersprint X-pipe
• TTV Racing flywheel
• Peak 318whp / 241lb-ft

Alpha N (Custom)

• No change to above other than tuning
• Note there were quite few runs and iterations of the tune but this was the "final" version
• Peak 337whp / 256lb-ft

[Dbutler]

Did you lift at 6500?

[x Spades x]

2006 M3 ZCP
Manual
95,800
Bone stock (for baseline pulls)
Dynapack (Hub dyno)
279HP
272TQ
(we took the 2nd highest as the highest looked wonky/glitchy)

[3staxontheradio]

EPIC Alpha N tune
SuperSprint Stepped headers
3.5" custom exhaust
4" custom intake with ITG filter
Tilton clutch/flywheel
Underdrive pullies


327WHP, 260WTRQ(#'s are SAE corrected), however this motor will end up detuned for classing purposes.

Whats the muffler setup and what diameter choke did you go with on the merge to 3.5"?

[GregS86]

NIce! Swaintech coated headers?

Yup.

[fourmula1]

Impressive power - are those stock camshafts?

Yes, stock, nearly 100k miles on engine and only been open for rod bearings, vanos, and valve adjustments.

[paulclaude]

I run detuned to 295HP for GTS3 but this is my max power tune.
2003, 97k miles, A LOT of track hours/miles.
Karbonius Race CSL Intake
Status gruppe headers cut band clamped to BW race section 1
BW race section 2 and 3
Tilton clutch
Underdrive pullies

Suggested he cant get enough fuel to it to push further....at this point it is lines or fuel pump I assume, everything else has been changed or cleaned. Not that I need more for my class.

Impressive power - are those stock camshafts?

[bigjae46]

EPIC Alpha N tune
SuperSprint Stepped headers
3.5" custom exhaust
4" custom intake with ITG filter
Tilton clutch/flywheel
Underdrive pullies


327WHP, 260WTRQ(#'s are SAE corrected), however this motor will end up detuned for classing purposes.

NIce! Swaintech coated headers?

[fourmula1]

Do you have AFR installed? Have you measured it on max tune map?

Just exhaust sniffer while tuning. I think I can view the data in winpep. Epic tune, not concerned.

[BMWfanz]

I run detuned to 295HP for GTS3 but this is my max power tune.
2003, 97k miles, A LOT of track hours/miles.
Karbonius Race CSL Intake
Status gruppe headers cut band clamped to BW race section 1
BW race section 2 and 3
Tilton clutch
Underdrive pullies

Suggested he cant get enough fuel to it to push further....at this point it is lines or fuel pump I assume, everything else has been changed or cleaned. Not that I need more for my class.

Do you have AFR installed? Have you measured it on max tune map?

[fourmula1]

I run detuned to 295HP for GTS3 but this is my max power tune.
2003, 97k miles, A LOT of track hours/miles.
Karbonius Race CSL Intake
Status gruppe headers cut band clamped to BW race section 1
BW race section 2 and 3
Tilton clutch
Underdrive pullies

Suggested he cant get enough fuel to it to push further....at this point it is lines or fuel pump I assume, everything else has been changed or cleaned. Not that I need more for my class.

[GregS86]

EPIC Alpha N tune
SuperSprint Stepped headers
3.5" custom exhaust
4" custom intake with ITG filter
Tilton clutch/flywheel
Underdrive pullies


327WHP, 260WTRQ(#'s are SAE corrected), however this motor will end up detuned for classing purposes.

[samthejam]

Meant to attach this to other post.

[samthejam]

Untitled by Sam DaJam, on Flickr

Nothing crazy
125k mile S54, no valve adjustment done to my knowledge.

HTE "canned" Tune
for these mods:
Megan Headers
BW Street/Track Exhaust 3.5"
BW Silicon Elbow

It has the stock airbox.
Original MAF, probably original 02s. Happy with how it's doin.