S54 Dyno Database

[EthanolTurbo]

Overrev?

Not as far as I can tell. I was in high RPMs but wasn't shifting, was going down the freeway. Rev limit was set to 8400 RPM.

[heinzboehmer]

Just wanted to update: last time I posted I was heading to the dyno. The night before, after street tuning with Hassan, I bent my exhaust valves. About to put new hardware in and then it's dyno time.

Overrev?

[EthanolTurbo]

Just wanted to update: last time I posted I was heading to the dyno. The night before, after street tuning with Hassan, I bent my exhaust valves. About to put new hardware in and then it's dyno time.

[digger]

2001 M3 w/ 107k miles
Supersprint V1 headers
Supersprint V1 catted section 1
Supersprint 63.5mm dual resonated section 2
Supersprint Sport muffler
Karbonius CSL Race airbox
OE CSL air filter
TMS IAT relocation w/ US IAT installed on stock lower intake duct
HTE Performance AlphaN tune
SPAL fan (both OE fans deleted)
Bosch 62431 386cc injectors
265/35R18 tires (idk if that matters much)

If anyone has suggestions on how to address the dips, esp the one at 5250ish, please lmk.

the dip at 3250 seems like it is too lean based on the AFR. im not sure the 5250 is something to worry about

[EthanolTurbo]

2001 M3 w/ 107k miles
Supersprint V1 headers
Supersprint V1 catted section 1
Supersprint 63.5mm dual resonated section 2
Supersprint Sport muffler
Karbonius CSL Race airbox
OE CSL air filter
TMS IAT relocation w/ US IAT installed on stock lower intake duct
HTE Performance AlphaN tune
SPAL fan (both OE fans deleted)
Bosch 62431 386cc injectors
265/35R18 tires (idk if that matters much)

If anyone has suggestions on how to address the dips, esp the one at 5250ish, please lmk.

I think that dip may be due to your cat. Torque should naturally dip at 5252 because it's the crossover point between horsepower and torque. Overall though your torque band is almost flat and horsepower doesn't seem to flatline up top so I would say overall it's making great power. Do you have the SAE corrected dyno charts by chance?

[SQ13]

2001 M3 w/ 107k miles
Supersprint V1 headers
Supersprint V1 catted section 1
Supersprint 63.5mm dual resonated section 2
Supersprint Sport muffler
Karbonius CSL Race airbox
OE CSL air filter
TMS IAT relocation w/ US IAT installed on stock lower intake duct
HTE Performance AlphaN tune
SPAL fan (both OE fans deleted)
Bosch 62431 386cc injectors
265/35R18 tires (idk if that matters much)

If anyone has suggestions on how to address the dips, esp the one at 5250ish, please lmk.

[Rre]

Hello from europe,
s54 built - je 12.5:1 pistons, actual cr 12.2:1
Chinesium H beam rods Athena fire ring gasket,
Stock ports and chambers,
Cat cams upgraded valve springs
Cat cams 304 296 cams with 13.75/13mm lift,
limited vanos travel because of ptw clearance
Stock headers
Self made csl airbox copy from glass fiber.
dual 2.5" exaust with x pipe and dual silencers in back.
porsche 911 640cc injectors
Modified flow through fuel rail
Aftermarket motec ecu running alpha-n tune
Fuel is european e98 standart which i suppose corresponds to usa 93 octane
Arp head and main studs
Acl race bearings

Figures shown are flywheel, as per whp i dont remember the exact number, but it was around 370hp.

As on the problem side, it has oil overheating issue and setrab oilncooler and hard set oil termostat isnt helping that issue at all, yes ofcourse we may have airflow issues on the radiator, but analag car with s50 engine and 380 hp has not even a scent of the mentioned problem.

Right now i am suspecting that maybe inadequate combustion chamber evacuation may be at faul - it leaves much residual heat which is heating the piston which then gives off heat to the oil throgh squirters cooling it with the said oil.
Im now thinking of that assumption because the engine breathing sound is a bit weird also the exhaust is quieter than the intake, which per my opinion shouldnt be the case given the only two small silencers it has.
im now thinking of reducing exhaust pipe diameter as well as increase the middle section of the x pipe, which is only slightly larger than the pipe as it is built like 2 pipes crossing each other at 30° angle, with no extra widening at the middle.

Also i would be wery thankful for some advice and open to opinions.

[Wernd]

Stock baseline


HTE tune, karb csl, SS stepped non catted headers, SS sec 1 res, SS sec 2 res, SS sport muffler on 91 octane

[cornerbalanced]

Ah nice! Well, that's what they had told me at the time haha. What's done to your S65 and what fuel? Solid numbers!

Shitty 91 octane, MS pulleys, MS intake, BimmerWorld headers & x-pipe, stock muffler, epic tune. Many overlook headers on S65s.

[lcrain]

Two recent graphs for my two ECUs for different racing classes. A prior peak run was 329 whp for reference but we did not run it to peak this time around. The first run was tuned for NASA ST/TT3 class and the second is for Gridlife GLTC. Something a little different! Stock s54 with SSv1 stepped headers and a custom exhaust as the only power adders. Tuned by Randy at EPIC.

[CrisSilberGrau]

Thanks for all the work you put into this BBRTuning (and the do re mi you spent dang). Pretty much what we've seen is most setups for the last 1k rpm seem to be flat on power for the most part and just stop climbing. Really interesting to see the Turner do so well, unless you just stuck with it over the Haimus. Wondering if results would differ slightly with the Karb V3 by now I think.

Still a really nice point of reference and really shows you how the compression bump brings the numbers up with cams. Then you have to ask yourself what part of that is the increase in compression and what part is it the lighter internals... S54 math is fun.

[BBRTuning]

BBRTuning - Did you work with Nick on the Emtron solution? I would say that the American Racing headers and 93oct (or E85) would get you over the 400whp mark.

T

Nick was definitely instrumental on helping me get up to speed quickly with the Emtron platform when I first started using it, but I developed this kit initially for the Motec ECU back in 2020 since no one else offered a true plug-in solution that supported the OEM CAN and didn't require any wiring. I then repeated the concept with the Emtron as that's now the new ECU to have. There's still a few things missing with the Emtron CAN integration but have been working with them on tidying up the last bits of that. They've been great to work with.

I don't think I could ever bring myself to run the ARH headers - I think it's a fantastic concept, just poorly executed. If someone properly designed a true equal length 6-1 header I'd love to try it! I think even the best 6-2-1 headers leave a lot to be desired as the secondary lengths are still very unequal. I know it's mostly a packaging issue but it would be really interesting to see what a true equal length header would do.

Not true My E90 M3 made 405whp & 300wtq on EAS' dyno (NA).

Very impressive results nonetheless. Happy to see S54s making FBO S65 numbers.

Ah nice! Well, that's what they had told me at the time haha. What's done to your S65 and what fuel? Solid numbers!

[cornerbalanced]

This is the highest HP NA S65 EAS has had on their dyno (they've had a lot).

Not true My E90 M3 made 405whp & 300wtq on EAS' dyno (NA).

Very impressive results nonetheless. Happy to see S54s making FBO S65 numbers.

[///Mangler]

BBRTuning - Did you work with Nick on the Emtron solution? I would say that the American Racing headers and 93oct (or E85) would get you over the 400whp mark.

T

[BBRTuning]

Bonus graphs!

BBR M3 vs Steve EAS E36 - EAS's S54 E36 race car, running BW 3" single, 288/280 Shrick, HTE tune, Turner airbox on an otherwise stock engine.





BBR M3 vs Sub2Speedhouse E92 M3 - my good friend Alex Bernstein's E92 M3 track car, with his own designed exhaust, intake, pulleys, custom tune by Epic, and CF airbox. This is the highest HP NA S65 EAS has has on their dyno (they've had a lot). Stock ones make about 355whp SAE here. So close to bolt-on/tuned S65 power! Not sure I can quite call my S54 an "S65 Killer" but we're close guys... haha