M4 ARMA cold air intake under developing

[CanAutM3]

A little shop somewhere in Taiwan is able to develop a 25hp better intake in a few weeks than the ///M engineers were able to develop over several years?

Sorry, but I need to call BS on this one.

And I have to agree with KennyPowers, the shape of the power curve is not very trust worthy either...

[karbonphiber]

How is this system considered a "cold air" Intake? To me, the location of the air box and filter is the same as stock, and It looks like all that was done was replacing the stock air box cover and intake tube with carbon fiber, and using a cone filter....

How does this set up improve intake air temperature over stock?

[///M ARMY]

Originally Posted by Richy Rich

JB4 Map 7, ER downpipes, BMC filters.

You should try map 6.

[SHLin]

this product is going to announce and start to sale soon, let's just wait for other users reviews and feedbacks.

i don't want to argue about this, at least I am happy with their intake

[MasterC17]

I have to admit, it does look good!

[HustlerX5]

Any videos? Really interested in what induction noise this car will make. Maybe it's what it needs instead of a better exhaust...

[m3less]

Yea it looks good!

[SHLin]

Originally Posted by HustlerX5

Any videos? Really interested in what induction noise this car will make. Maybe it's what it needs instead of a better exhaust...

[u2b]https://www.youtube.com/watch?v=mYu7IH1Bb70&list=UUhXUNjBd9MHxjK79DMvbTxw[/u2b]

I don't know how to link video... can someone help?

[Accel Junky]

Originally Posted by SHLin

I don't know how to link video... can someone help?

[bruce.augenstein@comcast.]

Originally Posted by CanAutM3

A little shop somewhere in Taiwan is able to develop a 25hp better intake in a few weeks than the ///M engineers were able to develop over several years?

Sorry, but I need to call BS on this one.

And I have to agree with KennyPowers, the shape of the power curve is not very trust worthy either...

You could easily be correct.

But BMW has to pass drive-by noise standards (at least here in the U.S.), while the aftermarket manufacturer doesn't. That's actually a pretty big deal.

The power curve looks pretty good to me. It's indicative of a flat torque curve, and the early peak is because the turbos are small and can't hold the boost gains up into the 7K region.

[Black Gold]

Originally Posted by bruce.augenstein@comcast.

You could easily be correct.

But BMW has to pass drive-by noise standards (at least here in the U.S.), while the aftermarket manufacturer doesn't. That's actually a pretty big deal.

The power curve looks pretty good to me. It's indicative of a flat torque curve, and the early peak is because the turbos are small and can't hold the boost gains up into the 7K region.

problem is that we have countless dynos that show the turbos holding power to peak RPM. various different types of dynos done by different companies and individuals at local shops

here is an example

[CanAutM3]

Originally Posted by bruce.augenstein@comcast.

You could easily be correct.

But BMW has to pass drive-by noise standards (at least here in the U.S.), while the aftermarket manufacturer doesn't. That's actually a pretty big deal.

The power curve looks pretty good to me. It's indicative of a flat torque curve, and the early peak is because the turbos are small and can't hold the boost gains up into the 7K region.

With those turbos muffling most of the intake sound and considering how loud the exhaust is, I am not convinced there is much restriction caused by noise attenuation on the intake.

As far as the power curve, there is no power plateau. Just a peak around 5200rpm. The curve is not what I expect from an S55.

[HustlerX5]

Originally Posted by Accel Junky

Thanks for posting! Can't really tell what it sounds like with the camera being in the back. Have you driven it with the intake installed? If so what are your thoughts on it so far?

[marc321]

Originally Posted by CanAutM3

With those turbos muffling most of the intake sound and considering how loud the exhaust is, I am not convinced there is much restriction caused by noise attenuation on the intake.

As far as the power curve, there is no power plateau. Just a peak around 5200rpm. The curve is not what I expect from an S55.

Not really the noise, but also the fuel efficiency, and engine stabilization. that's all OE manufacturers need to watch.

I am more curious about the feeling when driving this modified car. Is there any different?

DYNO is just a number, and I think we should more focus on driver's feeling.

[bruce.augenstein@comcast.]

Originally Posted by KennyPowers

problem is that we have countless dynos that show the turbos holding power to peak RPM. various different types of dynos done by different companies and individuals at local shops

here is an example

You have never seen a chipped M4 hold power to peak rpm. Just stockers - for the reason I stated.

[bruce.augenstein@comcast.]

Originally Posted by CanAutM3

With those turbos muffling most of the intake sound and considering how loud the exhaust is, I am not convinced there is much restriction caused by noise attenuation on the intake.

As far as the power curve, there is no power plateau. Just a peak around 5200rpm. The curve is not what I expect from an S55.

Turbos don't do much to reduce intake sound, because there's no transfer of energy at that point. They mostly "homogenize" the sound somewhat by attenuating harmonics.

I've had quite a bit of experience installing aftermarket intakes on turbo cars, starting with a couple of turbo Dodges I bought for my sons back in the eighties. The last personal example was an '04 SRT4 track car. In each case, the aftermarket parts greatly increased intake honk.

Turbos do in fact reduce exhaust decibels, primarily because they effectively turn exhaust energy in the form of heat and velocity into kinetic energy.

You haven't seen a power plateau out to 7K+ rpm on a chipped car. Just a stocker. Chipped M3/M4 cars tend to be all done around 6K or so, for reasons I've mentioned.

[Black Gold]

Originally Posted by bruce.augenstein@comcast.

You have never seen a chipped M4 hold power to peak rpm. Just stockers - for the reason I stated.

1) yes we have. Jb4 stage 1 and ESS tune and Dinan tune

2) this car in this thread is on stock software

I'm not seeing your point...?

[SHLin]

hey guys, no more arguing...
I told ARMA everything here, they told me they are hosting a BMW event, the top 3 winner can win ARMA intake for free (include M4 intake)

If you are really the car owner, why don't you just join the event and win the intake, then test by your own.

Here is the event link: https://www.facebook.com/events/1459022547687221/

[BEMR]

Originally Posted by SHLin

Just check it, everything looking still good.
when fitting, they were pretty careful. M4 is very expensive here, almost double price than in US. I think that is the reason they are very careful.

Why M4 is so expensive? because the import tax......it's a government rob

M4 starting price in China no options, 167,484.00 us dollars. Loaded about 210g.

My wife's 07 335 60g miles used here at auction in California, sold for 38,000 u.s. last year to Chinese exporter. Many used 335's wind up in China. They love White with tan leather.

[bruce.augenstein@comcast.]

Originally Posted by KennyPowers

1) yes we have. Jb4 stage 1 and ESS tune and Dinan tune

2) this car in this thread is on stock software

I'm not seeing your point...?

1) None of those tunes hold peak power out to 7300 rpm.

2) Good point in that the OP never mentioned any reprogramming. However, I would bet moderately important money that the before and after dyno chart is of a chipped car.

[PNF]

Originally Posted by bruce.augenstein@comcast.

1) None of those tunes hold peak power out to 7300 rpm.

2) Good point in that the OP never mentioned any reprogramming. However, I would bet moderately important money that the before and after dyno chart is of a chipped car.

LoL

The car isn't chipped not showing 2 different cars.

There are only few F8x owners here in Taiwan, let alone chipped cars here.

f8x cost more than equivalent of 170K USD here.

The mods part are also taxed and probably pay 30-50% more expensive.

In any case, I think Arma did a nice job. Not saying BMW
Engineers didn't, but they have regulatory issues to follow and to mass produce a car that would suit most countries needs.

It's different mind set if I may add.

Props to OP

[YMB_F80]

Well hopefully I win and can compare it to the Injen system that will come out.