+ 15 hp and 16 ft/lbs for $80

[tetsuo111]

I usually post in the E9x forums, but there's a lot of performance-centric people here, so....

The title sounds too good to be true. But for those willing to risk the modest sum of $80 plus dyno fees, you could easily prove or refute the claim yourself.

Dyno'd my car this morning. The purpose was to establish a new baseline to assess results for an upcoming exhaust project. The run was performed at the same shop and Mustang dyno as I used last summer. The ambient conditions were similar (50 deg F last summer and 54 deg today).

1) The chart shows results from this morning compared with those from last June

2) Power mods since last June include:

A. DIY Dinan-style CAI (parts - $20 for shp-vac hose from Lowes)
B. Charcoal filter delete
C. Rev Motoring silicon hose replacing stock intake muffler (~$60 on eBay)
D. Other mods listed in my signature

3) Bottom Line:

• Today: 238HP / 212TQ
• June: 222HP / 194TQ
• Delta: +16HP / +18TQ

Observations / Thoughts:

1) The new HP & TQ curves are much "smoother" than last summer. It was explained to me that this is consistent with improved breathing

2) AFR is significantly different than stock -

A. it's richer (in 12s vs stoichiometric ideal of 14.7:1)
B. the shape of the curve differs
C. it's choppier / more erratic

3) I estimate ~ 50hp drivetrain loss due to xDrive and Steptronic, based on curves from Axiom's official dyno thread.

4) this implies ~ 290hp at the crank.

Had I read this posted by someone else I would be very skeptical. Heck, the numbers are still hard for me to accept. I told this to the service tech, because I was an engineer and we tend to be overly cautious types. We triple checked all. The tech indicated that the results are not out of the ordinary given his experience with similar mods. I've also shared with The Axiom. I think I am lucky and received a very spunky N52 from BMW.

In any case, $20 for a shop vac hose plus another $60 to replace the stock intake muffler with a smooth silicon hose seems to result in real, usable, and measurable gains. Wanted to share because I've benefitted here, and thought a few people might be interested.

[ShocknAwe]

N52 engine?

[tetsuo111]

Originally Posted by ShocknAwe

N52 engine?

Yes, it's the only motor on the US-spec E91.

Just wanted to share this info, but seems to have no interest here. I thought that this was a screaming value, considering products > $1k generate similar or less gains (aftermarket exhausts, intakes, tunes, etc.). Plenty of forum engineering / undocumented claims to go around. These are documented performance gains for NA motors that are usable and so easy anyone can do.

With my other power upgrades, output is almost @ 300 HP. Measured on a Mustang.

Maybe wrong forum?

[ShocknAwe]

No, this is super cool, but there is a N52 specific subforum here on 1addicts where this might generate more interest.

[Dackelone]

Originally Posted by ShocknAwe

No, this is super cool, but there is a N52 specific subforum here on 1addicts where this might generate more interest.

This thread has been moved.

Dackel

[Bimmer-Bob]

Any more info on the "Dinan-style" CAI? I've heard that Dinan made a ram-air intake for the N52, but I've never seen it. I've also heard that the silicone intake hose was dyno-proven to make gains, but I am of course skeptical. But now you're the second one to show dyno-proven gains...

So you're pushing 300 HP at the crank - I assume you've also got the 3-stage intake manifold as well as headers and a tune? AA or other?

[Bimmer-Bob]

Never mind; just saw your mods in your sig.

[kobeballer96]

Pictures of the mod done. Is it like Mr. 5 intake mod?

[tetsuo111]

I can't take credit for any of these ideas. I just reworked projects that were done by others before me. Mr. 5, among others, quickly comes to mind.

- The corrugated plastic hose is from a Shop-Vac extension kit from Lowes. The ID is 2". The corrugation is abysmal for laminar flow. This V1 was just an experiment to see if there was anything to it. I have some 3" hose with much smoother lining, that I planned to upgrade, but not yet confident that it will fit. TBD.

- Stock paper filter sans charcoal thingy. Was using the Euro box with oiled PiperCross filter prior to this. I chose to experiment on the NA airbox, and cut holes for the hose with a dremel.

- As you can see, installation is very much prototype quality and not fit for public consumption. But the car hasn't fallen apart yet.

[tetsuo111]

DIY for the Dinan-style snorkel:

http://www.e90post.com/forums/showthread.php?t=1149331

[andrey_gta]

Rev Motoring elbow is a great mod.

Dinan Style (n52)/ Mr. 5 (n54) / DJ Apex (n52) or a cut away like Evice 130i will all lead to some gain

[kobeballer96]

Doing this this weekend then lol. Time to hunt for some parts this Saturday!

[Bimmer-Bob]

Originally Posted by andrey_gta

Rev Motoring elbow is a great mod.

Dinan Style (n52)/ Mr. 5 (n54) / DJ Apex (n52) or a cut away like Evice 130i will all lead to some gain

What makes you say this? I mean, I see the dyno above, but it's hard to say what contribution either the intake hose or the ram-air intake are having individually. Do you have the Rev Motoring part?

Also, what's the "Evice 130i?"

[andrey_gta]

Originally Posted by Bimmer-Bob

What makes you say this? I mean, I see the dyno above, but it's hard to say what contribution either the intake hose or the ram-air intake are having individually. Do you have the Rev Motoring part?

Also, what's the "Evice 130i?"

Yes I have the revo elbow. In the release months it was dyno'd to alone add 2 whp by Justpete.

Eice - was suppose to be EvoGlynn mod to euro air box - http://www.babybmw.net/forum/viewtopic.php?t=29860

Combined effect should be measurable, but I dont know if it is really 15 whp like this thread

[Swimjim]

website address for rev motoring please!

[tetsuo111]

Originally Posted by Swimjim

website address for rev motoring please!

Sold through eBay. Just eBay search Rev Motoring hose BMW. And you shall receive....

[Taskmaster]

You can buy the horn directly from Dinan for 30 bucks.

[tetsuo111]

Originally Posted by TheAxiom

You can buy the horn directly from Dinan for 30 bucks.

Did not know that part was available. Dinan? $30? Thanks for the heads-up!

[Taskmaster]

Originally Posted by tetsuo111

Did not know that part was available. Dinan? $30? Thanks for the heads-up!

Yessir! I bought the whole kitx cut it up and messed up the horn. I called Dinan and bought a new one for around $30. Thought that it would help.

[kafou]

Originally Posted by TheAxiom

You can buy the horn directly from Dinan for 30 bucks.

Do you have a link of the horn?

Thanks

[Taskmaster]

Originally Posted by kafou

Do you have a link of the horn?

Thanks

It's part of the Dinan intake for the E90 sedan (on their page Dinancars) but you can call and order just the horn.