E36 M3 Dyno Sheet Library

[e46tknv]

Year:1998
M3 coupe 180k miles
Mods: m50 manifold,uuc catback, eBay headers,
Some crap intake and tuned by Jordan@rk tunes.
Dyno type: superflow Autodyn 30
Condition: 90F
Gear dynoed: 3rd gear
Peak Hp: 230.6
Peak torque: 213.6

I'm very happy with the numbers. After the dyno, I removed ASC and put in a silicone hose there instead.

According to the shop owner, he claims his dyno consists of more load then a dyno jet would. But in my opinion, better to have lower numbers and be optimistic on what peak power you actually have.

[hide1]

Have you fixed your vanos yet?

[e46tknv]

Have you fixed your vanos yet?

Never touched Vanos yet. I've always wanted to though.

[hide1]

Never touched Vanos yet. I've always wanted to though.

Based on your mileage, there's a good chance you could get 15+ ft-lbs back..

[e46tknv]

Based on your mileage, there's a good chance you could get 15+ ft-lbs back..

I will definently look into it.

[MarkSanGi]

1997 e36 M3 sedan
Completely stock engine, except for a low budget chip the previous owner put in Above 4K it runs too rich and actually hurts HP, so getting a new chip soon.
Peak Horsepower 206 @ 5435rpm
Peak torque 212 @ 4650rpm
On a Mustang Dynamometer
Also a warm florida summer afternoon

Stock Dyno chart.jpg

[kovrol]

Which is the "better" dyno? The MAHA LPS 3000 or the DynoDynamics AWD 450 DS QUAD retarder chassis?

[Damokun]

Year:1997
Build Date: 8/97
Mods:M50 manifold, fan delete, TRM off the shelf tune
Dyno Type: DynoJet
Dyno Conditions: 94 degrees, 33% humidity
Gear Dynoed: 4th
Peak HP:218.7
Peak Torque:212.67

I'll be doing a bit more maintenance as well as doing exhaust work, then getting some dyno tuning in, hopefully soon.
IMG_1031.jpg

[328iJunkie]

looks decent

[Damokun]

It's not bad. But it'll be good to smooth it out a little towards the top end.

[e46tknv]

It's not bad. But it'll be good to smooth it out a little towards the top end.

I need to get on a dynojet.

What's this 12% higher read out that I heard about that Dynojet produces vs a Mustang dyno?

[pbonsalb]

Depends on the Mustang and how the operator sets it up. But the Mustang will typically read lower than the Dynojet. Same for a Superflo. Again, dyno operators can change their settings. They are probably better dynos for tuning due to the adjustable load, but that also makes them less easy to compare to a Dynojet. I would not make any assumptions without knowing more details about the Mustang set up.

[Damokun]

I'm placing a decent amount of trust in this guy that I went to. Markert Motor Works in Lawrenceville uses them for all of their tuning and baseline purposes, and I'm extremely impressed by their knowledge and customer service. I'll be using them when I'm finally able to start my turbo build. As soon as my wife's VW stops needing replacement parts, that will happen sooner rather than later....

[Midnightfreak12]

Year:1995
M3 coupe 205k miles
Mods: s52 engine,s50 manifold, 264/256 Shrick Cams, 24# Injectors, 3.5" Euro HFM / AFE intake Conforti chip.
Dyno type: Mustang dyno
Condition: 65 degrees,25% humidity. 5280 Elevation.
Gear dynoed: 3rd gear
Peak Hp: 205.0
Peak torque: 199.2

[e46tknv]

Wow^^^^

Those numbers are pretty much stock...
and parts alone that you purchased ran you about $1000.

That's insane.

[usedunderwear]

^ maybe its the elevation??

[e46tknv]

^ maybe its the elevation??

Doubt it makes a difference. I think it's all ratio.

[usedunderwear]

Doubt it makes a difference. I think it's all ratio.

1:1 ratio is supposedly 5th gear but lots of these dyno #'s arent done in 5th...

[Midnightfreak12]

Doubt it makes a difference. I think it's all ratio.

Why are you doubting Elevation doesn't make a difference?

[hide1]

Air is about 20% less dense in the mile high city. Which equates almost directly to 20% less horsepower.

[Brown9348]

Air is about 20% less dense in the mile high city. Which equates almost directly to 20% less horsepower.

True, The elevation--less dense air--does make a difference, im not sure what the numbers are exactly. On the Dyno it makes a difference, on the road it does make a difference too, but its not as dramatic as it sounds. The less dense air seems to reduce drag/wind resistance as well. I used to drive around a 1.6L miata at sea-level and up here and up at 7k feet, it honestly doesn't feel much less powerful than sea level. Forced induction= almost no difference at all (at least observable in the real world)

I'm no expert on this sort of thing... but even if the air is 20% less dense up here, I dont think that'd translate to 20% reduction in power. The engine still takes the given atmospheric pressure and compresses it before combustion, and yes, you are starting with less pressure and less oxygen but 20% seems too high.
The formula i found was (elevation) x (.03) x (HP at sea level) / 1000. not sure where the formula came from but at 1 mile that equals a %15.84 loss in power. 240-38=202HP(at the crank) @5280ft. and The guy from denver would have ~180hp to the wheels.
So 15% sounds more reasonable. And then considering the reduced drag, I think 10-15% reduction in acceleration might be closer.
For sure cars lose plenty of power at altitude though, no argument about that.

[pbonsalb]

3% per 1000 feet is the rough estimate of power loss. Many dynos, such as Dynojet, have a weather station that factors in altitude, humidity, etc. These factors go into the STD or SAE correction to yield standardized numbers. Show the runfiles in uncorrected format and there is obviously no correction and they will be less at altitude.

There may be other issues that will not be corrected by the dyno correction. Let's say you have a sea level tune and go to high altitude. It may not be able to compensate and you could be down on power compared to what a tune for your altitude would be. The HFM measures density so it will take care of a lot, but there can still be issues. Super hot days, for example, will be standardized and power will go up over the uncorrected. But if you car is pinging due to heat and timing is being pulled, that loss will not be accounted for.

[Midnightfreak12]

12596223_10153897745184419_669884494_n.jpg
If it makes any difference here's the chart from the Dyno.

[e46tknv]

Apex arc 8 group buy. 17inch



I forgot where I saw it but I saw it yesterday

[fsmtnbiker]

Year:1995
M3 coupe 205k miles
Mods: s52 engine,s50 manifold, 264/256 Shrick Cams, 24# Injectors, 3.5" Euro HFM / AFE intake Conforti chip.
Dyno type: Mustang dyno
Condition: 65 degrees,25% humidity. 5280 Elevation.
Gear dynoed: 3rd gear
Peak Hp: 205.0
Peak torque: 199.2

Stock exhaust?

Mustang dyno's are incredibly inconsistent dyno-to-dyno. If you want numbers to compare with anyone else, a Dynojet is by far the most common and consistent. Dyno Pro up in Arvada has really reasonable rates for baseline dyno's and the owner Bear is a great guy.