Dyno results... Normal?

[europower]

What do you guys think about these results on a dynojet? My car has a vf620 kit and test pipes. My friends car is bone stock. Looks like both of us are loosing a lot of power due to the altitude...

[Longboarder]

What is the altitude?

[pbonsalb]

SLC is 4300. That would explain about 13% loss. But dynojet can be run with altitude correction. Question is whether the shop was using it.

[Rat3d ///M]

Originally Posted by pbonsalb

SLC is 4300. That would explain about 13% loss. But dynojet can be run with altitude correction. Question is whether the shop was using it.

Unless I am an idiot and can't do math, the top chart (which I am assuming is his buddies stock S65) is showing a 27% loss in power (based on the stock 414). The average of the 3 runs is 305whp, and 305 is 73% (roughly) of 414.

I think the numbers seem very low. It should be closer to 351 whp based on the 15% rule. Of course, this is just my opinion. What do I know? At least the 620 SC setup is showing better numbers on the same dyno (78% drivetrain loss opposed to the OEM S65's 73% loss.)

[m3_love]

The dyno numbers on your buddy's car seem pretty low, I remember the numbers on my first e90 M3, all stock was around 335 hp and 230 torque to the wheels...

[utah_ee]

I am the owner of the kind of stock e90 that dyno'd with (OP) Europower. The car does have 20" Vossen Wheels which I have heard could contribute to power losses at the wheels.

My thoughts on the Dyno results were also that it seemed low. Curious why?

Wheels? Altitude? Mechanical? Software?

[S65M]

Seems very low but then again many things can be factored in. My car only made 352whp & 259 wtq (dyno jet) with Grupple m intake, tuner test pipes, Gintani race exhaust & Bpm stage 2 tune.

[Longboarder]

4,200 feet? Well then these results seem normal. You are both losing maybe 10 hp per thousand feet so add that back and the stock one is making 340 and the blown one 530. There you go.

[sublime1996525]

What shop was this? I also live in SLC. I always took my cars to Premier and they always had correction for altitude.

[elusive303]

Those appear to be corrected numbers as indicated by the SAE 1.13 (13% correction factor). Real rwhp should be much lower than that especially for the NA car.

[Kong Sheng Han]

Originally Posted by utah_ee

I am the owner of the kind of stock e90 that dyno'd with (OP) Europower. The car does have 20" Vossen Wheels which I have heard could contribute to power losses at the wheels.

My thoughts on the Dyno results were also that it seemed low. Curious why?

Wheels? Altitude? Mechanical? Software?

There's your problem. Get rid of those Vossen wheels.

[bimmerfrk]

This has less horses than my e90 328xi. Then again I did not have Vossen wheels

[MikeeM3]

Originally Posted by S65M

Seems very low but then again many things can be factored in. My car only made 352whp & 259 wtq (dyno jet) with Grupple m intake, tuner test pipes, Gintani race exhaust & Bpm stage 2 tune.

350whp seem low since most people have seen around 330-340whp when stock !! i have a similar set-up as yours with the addition of MS Pulleys and my tuner told me that i should expect around 480-490hp to the crank which mean's around 400whp ...

[sublime1996525]

Originally Posted by elusive303

Those appear to be corrected numbers as indicated by the SAE 1.13 (13% correction factor). Real rwhp should be much lower than that especially for the NA car.

Good catch! I didn't even notice the correction factor on the sheet.

[pbonsalb]

Originally Posted by MikeeM3

350whp seem low since most people have seen around 330-340whp when stock !! i have a similar set-up as yours with the addition of MS Pulleys and my tuner told me that i should expect around 480-490hp to the crank which mean's around 400whp ...

That is what your tuner told you. Go get on a Dynojet.

[Cbozz]

Originally Posted by ||||||||||

Unless I am an idiot and can't do math, the top chart (which I am assuming is his buddies stock S65) is showing a 27% loss in power (based on the stock 414). The average of the 3 runs is 305whp, and 305 is 73% (roughly) of 414.

I think the numbers seem very low. It should be closer to 351 whp based on the 15% rule. Of course, this is just my opinion. What do I know? At least the 620 SC setup is showing better numbers on the same dyno (78% drivetrain loss opposed to the OEM S65's 73% loss.)

well 414hp is stock but at the crank, to the wheels you loose about 10% already! so m3 will run about 350-370 max!

[Rajmun340]

wow significantly bad result. It seems the e92 m3 is an underperformer does not meet the manufacturer specs. Each time i see a dyno post people complain it's worse than expected.

What gas did you pump ?

[DSilk]

There are a number of factors at play here, and fuel is but one of them. The M3 generates a maximum of 414 bhp (420 using European measurements) at the crank. There is a loss of power between the crank and the rear wheels in every car, and this has to be factored in. Secondly, maximum power is generated at 8,300 rpm. The first set of graphs shows road speed, but not engine speed. Below 8,300 rpm you aren't generating full power. Third is the condition of the engine. Up to around 40,000 miles you should anticipate no power loss, but beyond that the wear to components like cylinders, piston rings, valves, and seals can and does have an impact on power production. This isn't unique to the M3. Finally, aftermarket "enhancements" often promise improved performance but can deliver the opposite (and some really do, but that's another subject).

[pbonsalb]

That is one reason to go to the dyno or dragstrip -- to see how your car is performing relative to other cars, whether your car is stock or modified. I plan to take my 08M3, out of curiosity. I take my turbo 99M3 every year or two -- did 677/580 on a Dynojet in SAE recently. My 08M3 has all the bolt ons and I figure it will do 375-400 rwhp with about 275 lbs rwtq, but the proof is in the plot and I don't have one yet.

[Installsplus]

I got 363 whp with tune and test pipes. 2nd run.

[ilikebmxbikes]

Originally Posted by S65M

Seems very low but then again many things can be factored in. My car only made 352whp & 259 wtq (dyno jet) with Grupple m intake, tuner test pipes, Gintani race exhaust & Bpm stage 2 tune.

Originally Posted by Installsplus

I got 363 whp with tune and test pipes. 2nd run.

we dynod a handful of e9x on dynojet and stock cars were 325-330whp and FBO were 350-365. Both your numbers seem right to me.

[ilikebmxbikes]

Originally Posted by JoeM3SSII

wow significantly bad result. It seems the e92 m3 is an underperformer does not meet the manufacturer specs. Each time i see a dyno post people complain it's worse than expected.

What gas did you pump ?

I think a lot of time people just simply put too much faith in dyno numbers. Its really impressive to drive in canyons or track, even in stock form but its not a dragstrip / dyno car.