S54 Dyno Database

[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.

[digger]

Yeah but 2-3lbs makes a difference in the big picture. A lb here, a lb there…it all ads up.

1 part in a 1000 lol

[bigjae46]

it will replace 2-3 feet of single 3.5" with 2-3 feet of dual 2.375" (or whatever it is) which will be maybe 2-3lb so doesnt sifnificantly affect the core weight saving benefit (claimed 62) as the saving is not from piping sizes but lack of cats and lack of big resonator / big muffler but i do know people would be avoiding because of the torque dip

Yeah but 2-3lbs makes a difference in the big picture. A lb here, a lb there…it all ads up.

[digger]

I am not worried about that region - track only. I might touch upper 3k a few times but usually it will be on purpose where I stay in a higher gear to deaden the torque because of a bump or tricky corner.

The BW race is all about weight savings and top end power. I think if you move the merge back it will add unnecessary weight for those who would buy this. You certainly wouldn't put a BW race on for the sound.

it will replace 2-3 feet of single 3.5" with 2-3 feet of dual 2.375" (or whatever it is) which will be maybe 2-3lb so doesnt sifnificantly affect the core weight saving benefit (claimed 62) as the saving is not from piping sizes but lack of cats and lack of big resonator / big muffler but i do know people would be avoiding because of the torque dip

[bigjae46]

to boost 2.5-4k you could experiment with exactly doubling (or close to it) the current merge distance (which would still be slightly shorter/less than the stock merge distance by looks of it) but it will likely soften 4-5k a bit as a compromise but shouldnt hurt anyting above 5k. its expensive doing custom exhausts and hard to undo , so it depends how much it bothers you for the type of use

i am suprised nobody as brought something similar to market as a bit less of a compromise and the 6-2-1 is the superior power setup over 6-2-H/X-2 with other advantages to boot

I am not worried about that region - track only. I might touch upper 3k a few times but usually it will be on purpose where I stay in a higher gear to deaden the torque because of a bump or tricky corner.

The BW race is all about weight savings and top end power. I think if you move the merge back it will add unnecessary weight for those who would buy this. You certainly wouldn't put a BW race on for the sound.

[digger]

.

The dip between 2.5k to 4k...because of the BW race?

to boost 2.5-4k you could experiment with exactly doubling (or close to it) the current merge distance (which would still be slightly shorter/less than the stock merge distance by looks of it) but it will likely soften 4-5k a bit as a compromise but shouldnt hurt anyting above 5k. its expensive doing custom exhausts and hard to undo , so it depends how much it bothers you for the type of use

i am suprised nobody as brought something similar to market as a bit less of a compromise and the 6-2-1 is the superior power setup over 6-2-H/X-2 with other advantages to boot