BMW N52 Engine HP and Torque AFTER the 3-Stage Intake Manifold and AA Headers Mod -- Dyno Test 

Lol. I am starting to hear that more often these days.

Thank you, brother! I wanted to do it right and do it justice through raw data. Enjoy your 328i!

Thanks, buddy. I definitely wanted to record this video series the right way using objective data. When I was thinking about doing this mod, I checked out different videos on RU-vid and just was not able to find an objective before and after to show the impact of the gains. Now we know. A lot of people told me not to do the mod because it was expensive and would not have resulted in huge gains, but I am so glad I did.

Awesome! Let me know how it turns out for you. I am really glad I did the mod.

Nice! Get a NA BMW while you still can. They aren't making any more of them. Keep me posted on what you decide to do with it.

The 328i sounds INSANE with a supercharger and headers. I just bought a 128i and a ESS supercharger.

@@JupiterLXIX how has that gone? Looking to do the same thing

Nice! Hundred percent agree on the change in the driving characteristics. Thank you for your comment, and stay tuned for more videos!

But have you noticed more wear and tear and earlier maintenance

Thank you, brother.

Absolutely. Very glad to be able to share objective data with you guys so that you all can make an informed decision.

Thank you, brother. I will definitely make more N52 content. Appreciate your support. Thank you for watching, and stay tuned for more content.

Awesome! You are going to love it. I am very happy with this mod. It really wakes the car up. Keep me posted on how it turns out.

Tell me more.

It makes your acceleration way faster

Thanks for your comment, bro. I love the silver color. So easy to take care of, and the car looks so classy. You probably won't have the same output in the N52b25 due to smaller displacement, but I am not 100% sure. In the U.S., we only got the 3.0 liter in the E9# series. Keep me posted on what you decide to do.

Thanks, buddy. This is with the tune from Active Autowerks.

I bought mine from Active Autowerks, and I have been pleased with the results. Best of luck!

Me too, I heard we can flash it to 330i or should I just tune it with the 3 stage intake manifold

I have all of those three mods. According to a conservative dyno machine, the car is producing 269 hp. Thanks for your comment!

@@GogoMotoring Not too shabby I’ll say

330i N52, AA headers, Tune, Charcoal Delete, Staight Piped, 300hp got it dynoe’d last week, u dead wrong homeboy , 255 to the wheels

@@Medal6 there is a n51 which is fbo and dyno showed 289hp crank and 400nm so n52 could get 300

I did. I purchased the AA tune. I have some other videos on all the work that went into the mod if you would like to see them. Thanks!

Same bro

Here are the official numbers: HP - 269 horsepower on a conservative dyno; applying an additional 20% increase as stated by the dyno shop brings you to 323 horsepower. The midpoint of the range is 296 horsepower. Torque - 237.5 pound foot of torque on a conservative dyno; applying an additional 20% increase as stated by the dyno shop brings you to 285 pound foot of torque. The midpoint of the range is 261 pound foot of torque. My car is RWD with a manual transmission. I hope this helps! You can tell a difference behind the wheel, especially at above 4,000 RPM. Keep me posted on what you decide to do.

@@gabrieldasilva4198 Just posted the numbers above. Thanks!

@@GogoMotoring nice numbers, also I was told you don't have to get a tune after you install active autowerks headers cause you still feel the power gains in the top end.

I'm a little confused by the math here. How did you come to 323 hp? I thought the dyno measured the car at 229 whp? Accounting for drive train loss, you're adding how much?

Do you have the three stage intake manifold installed already?

@@GogoMotoring I do not. I just have a tune on it

@@GogoMotoring I do not. Just a tune on the engine

@@NovieBigSad You probably would need at a minimum the 3-stage intake manifold, which I believe results in a bigger power increase than the AA headers. The N51 engine that was in the 2006 BMW 330i, which produced 255 horsepower stock, had the 3-stage intake manifold. When the 328i was released with the N52 engine, the 3 stage intake manifold was replaced with the single stage intake manifold, which in turn resulted in the stock horsepower decreasing to 230 horsepower. Conservatively, my car is now producing between 265 and 275 horsepower. Assuming the 3-stage intake manifold brought the horsepower up to the stock 330i numbers, i.e., a 25 horsepower increase, you could assume that the headers produced between an additional 10 - 20 horsepower. Does this answer your question? To do the mod properly, you should install a 3 stage intake manifold and the AA headers and get a tune optimized to maximize the power with these mods. If you had to just pick one, I would go with the 3 stage intake manifold with a tune because the AA headers can cause some issues when the car is at idle as shown in my latest video.

How much power did you make and what wear is your 328xi

Active Autowerks. Thanks for your comment!

The mods resulted in a gain of 30 wheel horsepower. BMW is known for officially underestimating the horsepower of its vehicles. When the E9# 328i first came out, even though it was rated at 230 hp, there were articles written about the car actually producing closer to 260 hp stock. Same case for the 2007 BMW 335i which was officially rated at 300 hp but was producing closer to 330 hp. So the discussion really centers more about what the true horsepower could be assuming BMW official figures were conservative, which they almost always are. But if you want to know what the impact of the mod was for my car in particular, it was slightly less than 30 hp at the wheels. Thank you.

@@GogoMotoring but its not producing 260 stock,...they make 201whp stock which is about 230 flywheel .. it makes zero sense that this is making 260 hp stock if it makes 200whp stock...30whp is a wonderful gain however, hope all is well

@@RingerRacing According to the dyno shop owner, their dyno machine shows more conservative dyno numbers than a dynojet (sp?) machine, which is apparently the most commonly used one. The dyno shop owner said to apply an additional 15% increase to the displayed numbers to arrive at what the numbers would be on a dynojet machine. Just sharing what I was told. Have a good one.

@@GogoMotoring cool story , the n52 doesnt make 260 flywheel stock.

If you think your tuned n52 produces 300hp, try to do a drag race against a stock 135i (300hp) and let us know the results. I have an n51 128i with AA headers and Stage FP nice. The gain is nice. But it’s no where near 300hp or even 290hp. I know n51 has slightly lower compression which runs about 8-10 hp less than an n52 with the same mods. My butt dyno estimates 30hp gain which puts it right around 260. With your mods, I think yours is around 270hp top. Get a dyno done to and let us know your whp.

Stay tuned. Haven't had any issues so far other than the rev counter hunting for RPMs at idle sometimes. I made a video about it. It's really just annoying more than anything else.

@@GogoMotoring any updates on this?

I got the AA tune.

@@GogoMotoring thanks, any issues so far?

@@hungrymynd5673 A minor one so far. I posted a video on it on my channel and will keep you all updated on how it gets resolved.

30 wheel horsepower gain. The disa valves were in good condition. That's probably a 45 horsepower gain at the crank.

@@GogoMotoring 30 hp gain at wheels=30 hp gain at crank...

Yes, sir. Great group of guys.

@@GogoMotoring Yeah they are. You local?

@@samuelfowler2157 I am. Do you live here as well? Be on the lookout for a couple of silver BMWs. ;)

@@GogoMotoring will do. I have a white evo x. I work at the opposite end of topside so I drive by fastech everyday. I'm sure I'll see you around. My girl just got a 09 328i. She loves bmw so I'm trying to learn a bit about them bec I have a problems with having to mod everything lol

That’s 200 hp at the wheels, which means that it was producing at least 230 hp at the engine when it was stock. You lose power as it travels from the engine to the wheels.

Resetting the adaptions fixed some of the idling issues I had.

Did you get a tune?

Remove that weird baby voice intro super cringe, absolutely loved the music part rifht after tho

I have the headers, tune, and intake, but not the MILVs. Nice upgrade to the car!

What does the mod do? Will definitely look into it. Thanks for your comment, and stay tuned for more videos!

I actually have not heard about that mod. What is it?

What model is the 3.91 diff from? 328xi auto?

@@joachimwaagaard7814 Yes! from all the modifications thats probably the one that has given the more sporty feeling to the car.

Tell me more. What is the mod and what does it do?