S54 Dyno Database

[S54B32]

Something fishy going on at 7250, could be o2 related due to high mileage.

o2´s in M3 e46 are narrowband and therefore only used in idle and part load to correct fuel. The DME only determines 3 conditions with o2s: lean, stoichiometric and rich. And on full load its always rich to control heat in the combustion chamber. So beside full trims(but these should be resettet before the run/tune) there should be no affect on full load dyno runs.

btw. fuel trims/corrections from o2s should be switched off for afr tuning. And while/after the tune in over 5000km of driving without o2s (because there is my WBO) i did not get a single downside from this (not in power, driveability or fuel consumption)

[heinzboehmer]

If your tuner has AFRs, they can make adjustments for that particular spot and fix it up. Dyno (sniffer I guess?) or wideband into an o2 bung.

Yeah dyno has a sniffer, so hoping the tuner can fix that spot up with that info.

O2s are a gradually deteriorating item and a good idea to be changed at 100k so yours is quite a bit overdue. I suspect a few hps will be credited towards the headers from that.

Agreed on the overdue bit. I've just been lazy and haven't done them

Got new ones ready to go in with my V1s though.

[jet_dogg]

O2s are a gradually deteriorating item and a good idea to be changed at 100k so yours is quite a bit overdue. I suspect a few hps will be credited towards the headers from that.

[Tbonem3]

If your tuner has AFRs, they can make adjustments for that particular spot and fix it up. Dyno (sniffer I guess?) or wideband into an o2 bung.

[heinzboehmer]

Something fishy going on at 7250, could be o2 related due to high mileage.

Yeah that dip does look weird, but it seems like other cars in this thread have similar looking curves. Hoping that new O2s and a dyno tune take care of that.

[jet_dogg]

Something fishy going on at 7250, could be o2 related due to high mileage.

[heinzboehmer]

From last time:

269 max WHP, 230 max WTQ

Put the car on the dyno again with the CSL airbox on. This time I tried out two different tunes, the stock CSL one (that I modified to work with stock cams) and an off the shelf PCS tune for my specific setup. Did this mostly just out of curiosity, but I'll be going back to get a dyno tune from Paul when I get my V1s on the car.

Updated setup:

• 128210 mi
• US spec pre-facelift M3
• Karbonius full carbon intake with carbon snorkel
• Kassel MAP
• Stock CSL IAT location and sensor
• HP converted MSS54
• Fully stock US exhaust
• All engine maintenance done
  • Rod bearings replaced ~15k mi ago
  • VANOS done ~15k mi ago, passes VANOS test with no issues
  • Engine retimed ~4k mi ago
  • Valve adjustment done ~4k mi ago
  • New front and rear TPSs <500 mi ago
• No mechanical fan, just aux
• Dynoed at Sonoma racetrack so altitude is ~sea level
• 75ºF ambient temp
• 50% humidity
• All O2s are original, got new ones in a box ready to go in when my V1s arrive, but potentially left some power on the table because of this
• Running Shell V-Power 91 octane

Stock CSL tune:


285 max WHP, 234 max WTQ

As expected, the car was running rich, but made more power than I was expecting.




PCS tune:


294 max WHP, 245 max WTQ (different runs)


All runs were done back to back, so you can see the car progressively get heat soaked. I flashed the car while it was on the dyno so it had a good ten minutes to cool down then for the PCS tune, but looking at the last PCS run, I think it could have made a little bit more power if we had let it cool down some more. Torque was up significantly from the first PCS run and then it just fell off.

Not the most insane numbers, but happy to have satisfied my curiosity. I'm excited to see what the car will do with the Supersprint stuff and Paul's dyno tune. Also attached the individual runs in case anyone is curious.

[stash1]

S54 E36 M3 with stock US headers, bimmerworld y-pipe, Stromung muffler and Karbonius intake on an HTE Alpha N tune.

Pretty strong numbers for stock US headers...thanx for adding to the database!

[stephen]

S54 E36 M3 with stock US headers, bimmerworld y-pipe, Stromung muffler and Karbonius intake on an HTE Alpha N tune.

[scotty737]

Here is the dyno at TTFS. Baseline was 305 ish whp, but the line is not on this chart.
Power mods: Supersprint V1, Hi flow cats, oem sec 2, race muffler, Rogue power pullies.

[ZiMMie]

You will more power with shell 91.

Don't want you money on any 94 BS in Ontario.

Shell 91 is higher quality fuel with better ingredients than all the others.

That including Sunoco 94.

[CrisSilberGrau]

Heres an update on my car/tune. Last time it was Turner box V1, oem euro header, and scza as power mods. In the mean time I've redone the rod bearings a second time due to a shops incompetence here in Toronto, went to RMP finally and will do so for the foreseeable future. Other maintenance, rebuilt injectors @132k miles (no notice of last time they were done or replaced), cleaned everything I could during that like the air rail/valves etc. Fit Tuner V2 body. I wanted to do the sparkplugs but that was one of the first maintenance items I tackled upon taking ownership at 113.5k miles, NGKs oem and new Coil packs as well.

The big change was SSv1, SS straight sec 1 and SS sec 2 resonated. SCZA is kept as is. Car is on EC7R 18x9.5s around 20lbs or a little under based on Apex's site.

Tuned with Hassan again, however I could not get time on the same Dynojet as last time, used another that had time available.

Baseline:
IMG_20210722_164734

This was the first run. When I first fit the headers on and started driving without a tune I felt a slight dyno butt increase, if anything just more oomph in the midrange. Quickly got accustomed to it.

Best run, I think this was the 4th run:
IMG_20210722_170420

For reference CAE is 321whp/243wtq I have the print outs in my car will update with pic later. We did more runs about 3 or 4 after and at that point the car was heat soaked despite the shops nice setup, power output was creeping down. Overall ~10whp from the baseline is great, whats better is the improved driveability, noticed that right away. As always Hassan is amazing to deal with, cant recommend him enough.

I thought this setup would see a bit more of an increase if I'm honest, maybe closer to ~15whp and comparable wtq gain. However like last time, Hassan mentioned that the fuel we have here Petro 94 doesnt come close to hitting the same timings as cars in Cali running 91. It was the same story last tune we did in Aug 2020. I have started looking into the quality of the octane rating for the various fuel providers here in Canada, and wonder if maybe Esso 93 is comparably better. The shop owners that are mostly a Mopar outfit, say that Esso 93 performs better on the cars they tune. Octane boosters are an option but thats also an unknown field to me, if some of you have experiences in this area fuel/octane would love to learn.

For reference this is the setup fan wise, which was adequate I guess:

IMG_20210722_170041

Video of a run, maybe its the best run. Ambient temps were at 30C almost or 80F:

VID_20210722_155407

Very fun experience as always. Authentic Performance in Toronto hosted me and my brother with his E36 M3 build, great group of guys and great pricing, highly recommended as well.

Overall 10/10 would do again, love how this thing drives after it gets tuned, much cleaner power delivery. My advice would be tune asap after a header/exhaust job like this, dont drive for 2 months like I did.

[CrisSilberGrau]

Lol, I worded that a bit poorly. No they don't make you remove your heat shields.

I meant to say that I'll put all the heat shields back on when I do headers, instead of leaving them off like I see a lot of people do.

I've done headers twice, not fun, and yah def keep heat shields on. Negligible weight penalty and pretty decent heat deflection.

[heinzboehmer]

WTF they go that deep into checking, you have to remove your heat shields? Thats bonkers man.

Lol, I worded that a bit poorly. No they don't make you remove your heat shields.

I meant to say that I'll put all the heat shields back on when I do headers, instead of leaving them off like I see a lot of people do.

[CrisSilberGrau]

Yeah. No big deal though. Can get everything swapped from CSL to stock (or vice versa) in about two hours.

I'm doing headers soon though, and I'm definitely not looking forward to swapping those out every two years. Hopefully I can get away with leaving all the heat shields on to cover them up, but we'll see.

WTF they go that deep into checking, you have to remove your heat shields? Thats bonkers man.