S54 Dyno Database

[paulclaude]

Epic Alpha-N dyno tune
Megan headers
3.5" BW race
Crappy Injen Intake
JB Racing Flywheel

337whp/267yq

That is about 12 more hp! Randy fixed the dip between 4.5k to 5.5k and it feels a lot better from 3.5k to 5.5k.

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

Nice power for the spec! The dip low down is due to the merge after the headers on the BW race. You won't be able to tune that out without moving the merge point in the exhaust to further back in the system (i.e. running dual pipes, then merging into single).

[bigjae46]

Epic Alpha-N dyno tune
Megan headers
3.5" BW race
Crappy Injen Intake
JB Racing Flywheel

337whp/267yq

That is about 12 more hp! Randy fixed the dip between 4.5k to 5.5k and it feels a lot better from 3.5k to 5.5k.

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

[CrisSilberGrau]

What was your buddies set up like, headers, Sec 1, 2, cams, intake…..anything else.

Oem euro headers, CPI rasp sec 1, oem sec 2, DIXIS. With and AFE intake car made around 315whp on a dynojet, Hassan mentioned the sec3/muffler was slightly holding back. It matters if you are after every little bit.

[Cronenberged]

Anything with that sharp 180deg bend will rob some power (DIXIS, Gruppe M, etc.), dyno looks a bit wavy. This happened to a friend with DIXIS exhaust.

If you dont care, Dinan has the best flow, 2.5in dual. After that I think it’s the SCZA or Scorza, then maybe SS Race. Id love an SS race with 2.5in piping just dont think theyd make one anymore.

What was your buddies set up like, headers, Sec 1, 2, cams, intake…..anything else.

[IND-Distribution]

Will be very interested in a race muffler with 63.5mm piping, this will make the muffler quieter even by a bit. The weight is more key for me vs the SCZA, as well as the flow which might be marginally better on the SS. DM'ed.

PM replied. Honestly I'm not sure the 60 to 63.5mm change will really be discernable in tone or volume, but maybe it will a tiny bit deeper? The weight will also go up ever-so-slightly. SS quotes the original race at 28 lbs, so figure such a small change in diameter shouldn't add more than a couple pounds and will still be a bit lighter than the SCZA.

[CrisSilberGrau]

As you guys have identified, Supersprint will essentially do any (reasonable) pipe diameter with any jig they've created and it usually just requires a special request. Over time (and based on demand), they have been adding new part numbers to the catalog to cover these "special requests". As they already had the 63.5mm segment for the E46, it only made sense to add the 63.5mm rear SKU. They just added the new SKU last week so you're not crazy.

Will be very interested in a race muffler with 63.5mm piping, this will make the muffler quieter even by a bit. The weight is more key for me vs the SCZA, as well as the flow which might be marginally better on the SS. DM'ed.

[IND-Distribution]

As you guys have identified, Supersprint will essentially do any (reasonable) pipe diameter with any jig they've created and it usually just requires a special request. Over time (and based on demand), they have been adding new part numbers to the catalog to cover these "special requests". As they already had the 63.5mm segment for the E46, it only made sense to add the 63.5mm rear SKU. They just added the new SKU last week so you're not crazy.

[Cronenberged]

Hmmm maybe try the acquisition through IND-Distribution

[CrisSilberGrau]

Cronenberged I think its a special request, I've tried messaging them to request pricing either on IG or email but got generic responses that lead nowhere ie. "look at the 63.5mm system". However, its commonly known that the part #for the race muffler is the same regardless if you select 60mm or 63.5mm on their site. I think there may be a language barrier not sure. I would like a 63.5mm race muffler as well.

EDIT: Something changed on their site, just checked

63.5mm system select part nr#045006 - this has a blue dot on their website signifying "on demand" production.
60.0mm system select part nr#044006

This is new, it was all the same part numbers on their site a few months ago. I checked and posted in another thread.

[Cronenberged]

CrisSilberGrau you can still get the 2.5” SS Race it’s just a special request.

[CrisSilberGrau]

Anyone know of Sec 3 exhausts that rob power and which ones don’t.

Anything with that sharp 180deg bend will rob some power (DIXIS, Gruppe M, etc.), dyno looks a bit wavy. This happened to a friend with DIXIS exhaust.

If you dont care, Dinan has the best flow, 2.5in dual. After that I think its the SCZA or Scorza, then maybe SS Race. Id love an SS race with 2.5in piping just dont think theyd make one anymore.

[Cronenberged]

Anyone know of Sec 3 exhausts that rob power and which ones don’t.

[nextelbuddy]

Went to the dyno few weeks ago to get a baseline before catless euro headers setup gets installed.

This is in my s54 M3 wagon.

Engine was completely torn apart on the engine stand for a fresh rebuild. Piston tops were cleaned, I even soaked and cleaned both camshafts rockers. Everything to get them that can brand new which was nice.

- ACL rod bearings
- new genuine BMW head gasket
- all new intake and exhaust valve stem seals
- all new gaskets and seals top to bottom
- complete Vanos refresh with beisan parts and all new lower timing chain guides, oil chain guides, o rings etc.
- valve adjustment


Mods are just
- Geoff steel V1 CSL air box with genuine snorkel and flap
- CSL stock tune
- SMG CSL tune
- stock US catted manifolds, stock section 1, 2 and CSL section 3


Final numbers were
301 whp
234 tq


Hoping for more with catless headers and an HTE tune

[BMWfanz]

I’ll contact Hassan tomorrow and see what he thinks. Dyno is booked for a bit so it may be a while before I can get it back on. Definitely something I’d like to get sorted

Tuner will don't care about actual numbers, cause all dyno will measure different power torque due to settings. All about they care is delta- before/after tune. If you have some doubts- check it on the road, maybe 100-200 (10-130MPH) dragy will sort it out.

[x Spades x]

282 whp/215 tq on a mustang dyno

149k miles on the motor

-turner CSL box
-SG catless headers
-SG catted section 1
-SG unresonated section 2
-SG SCZA muffler
-JB racing clutch and lightweight flywheel
-HTE tune

What does everyone think? Had to dump a lot of fuel into it as we were running super lean at first. Hassan was able to restore drivability, thing is a riot around the streets now.

I would expect 325 with those mods. My old motor put me at 300whp with just the airbox and Alpa N tune... everything else stock.

I'm guessing it's the dyno