S54 Dyno Database

[heinzboehmer]

Where are you guys strapping the car to on the dyno? I need to schedule a remote tune soon and the shop I'm planning on using doesn't typically work on E46s. I've got some beefy SPL Parts rear lower control arms, but ideally I'd have it secured elsewhere.

The dyno operator at the one I went to used t hooks. Take off the rear jack pads, put the t hooks in and strap it down.

https://www.bimmerworld.com/Tools/BM...-Set-of-4.html

This is how BMW straps the cars down for shipping too.

[Jickel180]

Where are you guys strapping the car to on the dyno? I need to schedule a remote tune soon and the shop I'm planning on using doesn't typically work on E46s. I've got some beefy SPL Parts rear lower control arms, but ideally I'd have it secured elsewhere.

[stash1]

No Dyno Curves posted for any 296/288 cams it seems. Has anyone built NA race motors and published their Dyno sheets?

I feel like most folks building race motors (and it's probably a very, very small number) aren't concerned w/posting graphs on forums or FB...or social media in general. The only person that I know for sure that is running big boy cams is Mike Cotter, but his cams are custom, and he's running a stroker motor as well. Unfortunately, I've never seen one of his more recent dyno's, but rumor has it that he's making around 400WHP now.

[M3EuroLTW]

No Dyno Curves posted for any 296/288 cams it seems. Has anyone built NA race motors and published their Dyno sheets?

[jet_dogg]

Three fifty for full track car on 91 and no cams is pretty good.

[CrisSilberGrau]

Ethanol, track specific timing targets... supporting mods. Still very high number for that car. Well done imo.

[DropTopKingM3]

Has anyone seen what HassanEido posted today on Instagram? This must be a Wednesday car for sure aka factory freak!

[SQ13]

Guessing 340ish.

340ish with Karb intake? Boooooo 😭

[jet_dogg]

I’ll try to get a baseline for my track car. Currently it has CPI headers, BW race exhaust, and SPAL fan only. We’ll see what it puts down after it gets a Karb intake, IAT relocation, and HTE tune. 350-360 WHP would be cool.

Guessing 340ish.

[stash1]

^^^Sounds about right, and yep, the factory headers are def holding the engine back now a bit. Looking forward to updates, and thanx for contributing/posting!

[SQ13]

In Austin, TX on a dynojet. Weather: 77°F and 68% humidity.

2005 M3 with 73k miles
Karbonius CSL intake
Stock catted headers
RE resonated sec 1
RE X-pipe sec 2 w/ closed cutout
Stock muffler
HTE remote dyno tune
93 octane fuel (Shell FWIW)

Max HP: 297
Max TQ: 241

I did not get a baseline reading with stock intake and the old Epic tune unfortunately. Karb snorkel is still on its way to me, so I wasn’t able to run it with that and an IAT relocation. I want more power, but my exhaust setup is def not ideal. So the plan is to get Euro or AA headers, catted sec 1, dual pipe sec 2, and Supersprint street muffler. And I’ll prob do a SPAL fan conversion as well. I’m hoping all of those changes will put me at 330-340 WHP.

I’ll try to get a baseline for my track car. Currently it has CPI headers, BW race exhaust, and SPAL fan only. We’ll see what it puts down after it gets a Karb intake, IAT relocation, and HTE tune. 350-360 WHP would be cool.

Also, the intake is fucking loud from the outside. The shop’s dB meter read 116 dB… Insane.

[jet_dogg]

You'll probably dyno 2-3 more on theirs since they have the fans but then it's warmer here so might cost you a couple as well.

[heinzboehmer]

Yeah maybe. Maintenance is up to date, so I'm fine with it. If there's anything wrong with it, then it's probably something internal to the engine. I'll do a rebuild when it's necessary, but I'm happy with it for now.

Maybe next time I drive down to LA, I'll throw it on EAS's dyno, just to see what it makes on that lol

[jet_dogg]

Heinz, I still believe your car is about 10hp down on power for what it's worth though you don't care.

[heinzboehmer]

Gain of 42whp/25tq, that must be nice

This is a good comparison and the car made 62whp more than stock - https://nam3forum.com/forums/forum/m...-numbers/page2

His engine has 30k miles less and the SS-dual section 2 with muffler, so that's probably worth ~15-20whp. As you said, your current power level is solid.

Looks like that car's power increased by 19.8%. My gain was 17.2%, so not super far off. If I manage to find 7 whp (better fuel, colder temps, rest of the SS exhaust, etc.), I should be able to bump my percentage gain up to 19.8%. The screen won't show 348 whp, but I can at least same the gain was the same

No, but in reality this is plenty of power. Certainly more than what I need. From now on, I'll be putting money towards track days to try and work on that driver mod instead of trying to chase power.