New Mods from EAS / Unsurprising Results from Scoops/Axle Back

[Limey]

Visited EAS today for a Macht Schnell intake, pulley and spacer install. Thank you David for cutting me a good deal and getting me out the door within 2 hrs. Looking forward to my Challenge Xpipe and tune!

Picked up my 2nd E90 in December and immediately installed an AE Performance axle back, BMC air filter, RPI scoops and a few other non-performance mods at another shop.

1. Dynojet run on the stock car produced 363 WHP. V. healthy.

2. Today's Dynojet at EAS also produced 363 WHP. AE "guarantee" on their website up to 18 peak HP at the flywheel. RPI claims several WHP gains with their scoops (obviously these would seemingly be effective, if at all, at high speeds). Would the BMC filter add a few horses? Long shot.

3. Conclusion: Was the 363 WHP before and after a coincidence, or was the second Dynojet run result more conservative and the original mods did add some power?

4. Advice: Don't necessarily expect gains from any scoop, axle back or air filter. By all means add the scoops and filter for the sake of a few hundred $$ just in case. Get the pipes if you want to make a lot of noise. They sound awesome! Not bashing any of these products, and not disputing that many have witnessed power gains from them, and I don't regret spending the money either, but would have love to have seen maybe 364 on the dyno

Once my Challenge Xpipe is installed in a few weeks EAS will Dyno and see where this and the Macht Schnell mods get me.

Vid and pics:

[M3Monster]

The first dyno, was it at EAS also? Or a different shop?

Side note: is that the BMW performance spoiler?

[Limey]

Originally Posted by M3Monster

The first dyno, was it at EAS also? Or a different shop?

Side note: is that the BMW performance spoiler?

Different shop. Same dyno jet.

Yes.

[taico]

Nice clean car OP...may I ask what type of tint are those and where installed? Any issues with dot matrix around the windows?

Also, would you recommend the place you get got the power coated wheels?

Thanks!

[OerdingE93]

nice video, cant wait to hear it with the mid pipe

[pbonsalb]

I'll guess the first dyno was optimistic. At least in the US, the best stock 93 octane dyno is around 350 rwhp. There is a dyno database you can explore. Maybe UK gas is a little better and allows another degree of timing or maybe not.

Your second dyno seems possible but even that seems on the high side by US results in the dyno database for just an axle back and filter. The track pipe or at least a high flow cat midpipe should do more than an axle back and filter put together. Another good mod is an underdrive pulley.

[THE TECH]

Originally Posted by LondonGentleman

4. Advice: Don't necessarily expect gains from any scoop, axle back or air filter. By all means add the scoops and filter for the sake of a few hundred $$ just in case. Get the pipes if you want to make a lot of noise. They sound awesome! Not bashing any of these products, and not disputing that many have witnessed power gains from them, and I don't regret spending the money either, but would have love to have seen maybe 364 on the dyno

This is common knowledge here. Scoops are for looks really, axle back is just for sound and possible weight loss and air filters won't do any better than stock.

That being said, I have done all the above on mine as well. I am still a happy camper.

Nicely done.

[GOLFFRR]

looking good.

[Vancouver_M440]

Oh man. That's exactly how I want my AW to look. Nice. Now I have a good idea what all the mods will look like together.

[tom @ eas]

It's rare any axleback will offer increases within ~5hp, even the Akrapovic SlipOn systems are minimal at best. Most will swap axlebacks for the following reasons:

1. Exhaust Note
2. Aesthetics (tip diameter, exterior appearance)
3. Weight savings

However, swapping X-pipe in combination with intake/pulley will show considerable gains.

[GIdriver]

I don't want to tell you we told you so but: we told you so.

http://www.m3post.com/forums/showthread.php?t=629650

Nice clean car.

[Limey]

Originally Posted by GIdriver

I don't want to tell you we told you so but: we told you so.

http://www.m3post.com/forums/showthread.php?t=629650

Nice clean car.

Ha!

[Trevor .:R]

i did 356whp highest with Rpi scoops Bmc filter and RPI axleback 6mt! =D

[Singletrack]

Nice car. Hard to compare diff physical dynos, days, operators...especially for such minor modifications.

[M3DCTBT]

Originally Posted by Singletrack

Nice car. Hard to compare diff physical dynos, days, operators...especially for such minor modifications.

Correct, this test is invalid, same 'type' dyno means NOTHING. Strap down, correction, and even the dynojet machine itself can read different. Mythbusted.

Most other shops, actually no other shop uses STD correction like EAS does.

[Mr. 5]

Originally Posted by M3DCTBT

Correct, this test is invalid, same 'type' dyno means NOTHING. Strap down, correction, and even the dynojet machine itself can read different. Mythbusted.

Most other shops, actually no other shop uses STD correction like EAS does.

I agree with you in comparing dynos from other shops but disagree with you about the std correction factor.
The bottom line is that people started to use STD on the froums because it read more power.
A while back I posted a dyno that was SAE and everybnody was commenting about why I had such little power compared to others. lol

I would bet that EAS uses STD because that is the norm these days.
Let's face it, most people get dynos done for bragging rights so if STD reads higher, then they would want that graph printed for them isntead of SAE.

Actually, I can see it now...a guy goes into the dyno shop and gets a dyno. They get a print out in SAE. The guy looks at the numbers and then reaslizes that it's SAE so he asks if the print out can be displayed in STD because he is going to post this on the forums.

[M3DCTBT]

Originally Posted by Mr. 5

I agree with you in comparing dynos from other shops but disagree with you about the std correction factor.
The bottom line is that people started to use STD on the froums because it read more power.
A while back I posted a dyno that was SAE and everybnody was commenting about why I had such little power compared to others. lol

I would bet that EAS uses STD because that is the norm these days.
Let's face it, most people get dynos done for bragging rights so if STD reads higher, then they would want that graph printed for them isntead of SAE.

Actually, I can see it now...a guy goes into the dyno shop and gets a dyno. They get a print out in SAE. The guy looks at the numbers and then reaslizes that it's SAE so he asks if the print out can be displayed in STD because he is going to post this on the forums.

As a multiple dyno operator myself I totally disagree with your statements.

There is nothing NORMAL about using a different feature then SAE on a N/A car just so the car shows HIGHER numbers. The whole point of SAE was to normalize the differences in weather / humidity in dyno results from dyno station to dyno station. If that is now an "acceptable" BMW thing, it's a sad sad day in the tuner world. What's next? Loosening the straps?

[DLSJ5]

Originally Posted by Mr. 5

I agree with you in comparing dynos from other shops but disagree with you about the std correction factor.
The bottom line is that people started to use STD on the froums because it read more power.
A while back I posted a dyno that was SAE and everybnody was commenting about why I had such little power compared to others. lol

I would bet that EAS uses STD because that is the norm these days.
Let's face it, most people get dynos done for bragging rights so if STD reads higher, then they would want that graph printed for them isntead of SAE.

Actually, I can see it now...a guy goes into the dyno shop and gets a dyno. They get a print out in SAE. The guy looks at the numbers and then reaslizes that it's SAE so he asks if the print out can be displayed in STD because he is going to post this on the forums.

Craig,

Some great points, but STD has never been the norm here, for the most part it's been SAE, and at times the 3 most widely used are posted at the same time so you can compare. I think it should also be the norm or the standard to post AFR and Boost graphs as well, something everyone should do if they're FI, and AFR if they are NA.

[Mr. 5]

Originally Posted by M3DCTBT

As a multiple dyno operator myself I totally disagree with your statements.

There is nothing NORMAL about using a different feature then SAE on a N/A car just so the car shows HIGHER numbers. The whole point of SAE was to normalize the differences in weather / humidity in dyno results from dyno station to dyno station. If that is now an "acceptable" BMW thing, it's a sad sad day in the tuner world. What's next? Loosening the straps?

I'm actually quite serious.
I personally use dynos for tuning and to see what each modification has done to the car, but I've seen it over and over again.
I used to go to MD Automotive for all of my dyno runs.
Mark (the owner) was asking me about the BMW crowd and why they wanted the print outs in STD, and I said plain and simple that it's because it shows more hp.
STD also factors into account the weather,humidity, etc so I don't understand why you are only stating that SAE does. It's just that SAE has a different calculation and the numbers always read lower than STD.

Originally Posted by DLSJ5

Craig,

Some great points, but STD has never been the norm here, for the most part it's been SAE, and at times the 3 most widely used are posted at the same time so you can compare. I think it should also be the norm or the standard to post AFR and Boost graphs as well, something everyone should do if they're FI, and AFR if they are NA.

I'm not arguing what is best to use. I just see it over and over.
Someone posts a dyno online and then they compare it to another dyno.
First of all, they are comparing STD to SAE, and they are wondering why the numbers are so high or low.
Once someone posts the STD numbers then now everybody wonders what their graph would look like if they used STD. Now it starts with posting in STD.

I don't care if a dyno in Jew Jersey is the same exact model as the one in CA. 2 different dynos could and most likely WILL read differently.
Dynos should only be used for changes done on the same car on the same dyno.

[Mr. 5]

After searching, I was able to find these threads. They are all posted with STD:

http://www.m3post.com/forums/showthr...highlight=dyno

http://www.m3post.com/forums/showthr...highlight=dyno

http://www.m3post.com/forums/showthr...highlight=dyno

http://www.m3post.com/forums/showthr...highlight=dyno

And that was only looking at the first 2 pages out of 12.