S54 Dyno Database

[heinzboehmer]

My car is completely stock right now, so took it in for a baseline dyno run.

Here's the setup:

• 126270 mi
• 100% stock US spec pre-facelift M3
• Converted MSS54 running stock 2501 HP software
• All engine maintenance done
  • Rod bearings replaced ~13k mi ago
  • VANOS done ~13k mi ago, passes VANOS test with no issues
  • Engine retimed ~2k mi ago
  • Valve adjustment done ~2k mi ago
• No mechanical fan, just aux
• Dynoed at Sonoma racetrack so altitude is ~sea level
• 70ºF ambient temp
• Dyno said 50% humidity, weather app said 90%, so unfortunately no clear answer for that
• 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

269 max WHP, 230 max WTQ

First three runs were done back to back with one fan flowing air into the radiator. Fourth run was done after letting the car cool down for ~5 min and pointing another fan at the driver's side fog light area. I've attached all the individual runs to this post in case anyone wants to take a look at them.

Results were pretty much exactly what I was expecting. I think I told the dyno operator I was expecting to see 270 WHP. I'll be back when I get my CSL airbox back on and then back again when the V1s go on to get a full dyno tune.

[jet_dogg]

What fuel?

[bigjae46]

Dyno said 50% humidity, weather app said 90%, so unfortunately no clear answer for that

If it was near any sort of climate control, I would suspect that 50% is closer to being accurate.


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[heinzboehmer]

What fuel?

91, forgot to mention that. I'll update the post.

If it was near any sort of climate control, I would suspect that 50% is closer to being accurate.


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Shop door was wide open before the dyno runs, but yeah I'm inclined to believe it was closer to 50%.

[stash1]

Nice, about what I would expect on a DJ from a stock M3...seen them anywhere from 260-280-ish stock. Should see some nice improvements from the V1's and a tune! Thanx for contributing to the database!

[eXpensiveGears]

Are you going to swap the CSL airbox out every 2 years for smog?

[heinzboehmer]

Are you going to swap the CSL airbox out every 2 years for smog?

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.

[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.

[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]

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.

[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.

[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.

[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.

[stephen]

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

[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!