[nespharym]

Just received some input on the prototype airscoops Race Precision is working on for the 335i. When the unit was installed on my car, it gained 7hp on the dyno, before some wheel hop due to a bent rim. I am sending them my stock wheels to see the true gain. Looks like these babies have a huge following in the M5 community…see the following threads

Full Production is scheduled for APRIL/MAY ‘08

http://www.m5board.com/vbulletin/sho...d.php?t=105380


http://www.m5board.com/vbulletin/sho...d.php?t=105380

[ironic]

how exactly do they work?

[OpenFlash]

I suspect they work on the dyno because you don't have 50+mph wind blowing in front of the car. So the scoop helps to channel whatever little airflow there is into the airbox. On the road, I'd be alarmed if they did anything.

BTW M-cars are notorious for detuning the engine as intake temp rise. So dropping them a bit through airflow management does make power on the dyno. But, on the road, it should already make this power (if not more).

Shiv

[schneid4323]

On a turbo car? with an airbox? but why



For once I agree with shiv....

[DrDomer]

So what do you get for $250? Seems like an ugly piece of red plastic.

[lawdude]

Tacky

[nespharym]

Originally Posted by shiv@vishnu

I suspect they work on the dyno because you don't have 50+mph wind blowing in front of the car. So the scoop helps to channel whatever little airflow there is into the airbox. On the road, I'd be alarmed if they did anything.

BTW M-cars are notorious for detuning the engine as intake temp rise. So dropping them a bit through airflow management does make power on the dyno. But, on the road, it should already make this power (if not more).

Shiv

Go to the second page of the link I posted...as far as working on the road and not dyno...guys with M5s and GPS tracking have detected quicker times with the scoops...so, you may yet have to be "alarmed"

[OpenFlash]

Originally Posted by nespharym

Go to the second page of the link I posted...as far as working on the road and not dyno...guys with M5s and GPS tracking have detected quicker times with the scoops...so, you may yet have to be "alarmed"

It's absolutely possible. Won't know until someone tests it.

Shiv

[Driver72]

Originally Posted by ironic

how exactly do they work?

Think they use these "cow catcher" scoops with a tube tunnel that feeds into the stock airbox intake tube.
In theory, this new fresh air that is being "caught" from the scoop is then forced into their tubes and then into the stock airbox tubes for more air.

Personally, I'd think it might work, and possibly better than the "cold air" intakes released so far that is simply a cone air filter sitting open under your hood that is doing nothing more than sucking in the hot air trapped under your hood.

But if you only get 7 whp for $350 installed, I'd rather just spend $50 and use a high flow drop in air filter (K&N, ITG, etc) and get the 3 whp or so that alone supposedly gets you.

[nespharym]

Originally Posted by DrDomer

So what do you get for $250? Seems like an ugly piece of red plastic.

I don't think the pricing for the 335i has been determined yet since he is still in the R&D process...but even still on the following cars

- 2007 M6 (+12whp)
- 2006 M5 (+10whp)
- 2008 M5 (+16whp)

would you turn away up to 16whp gain for about $250....and I think that is for the whole kit

RPi Ram Air Kit includes.
- BMC air filters
- RPi Ram Air Scoops
- Mounting Screws + instructions

again, that was for M5/M6 vehicles...my 335i gained 7hp so far with the first prototype

[RPIpower]

Hi guys. We are the ones that developed the scoops for the 335i. I don't believe many of the hot air...I mean cold air intake systems out there now a days. Switching to a cone or induction type filters rids you of the ability to pressurize air into the system. Anyhow, the systems have worked well for the M5 and M6s, both on the street and track so I made these as a favor for Carlos. The purpose of the scoops are to channel dedicated air into the stock intake ducting. Without the scoops, the engine is just sucking its share of air that is flowing directly at the radiator, etc.

Here is an example of how it works on the M5 and M6. The 335i is no different. All you have to do is look at where the stock intake is getting air from. The only concern right now is if these scoops are going to cause for higher coolant and oil temps. We saw no issues on the M cars but will continue to monitor this one. Like everything else we did on the M cars, we will test them on a few other cars before we make any claims. So...some of you local guys may want to jump in and get some free dyno time.

[Rugs]

Very Interesting, if it helps with lowering intake temps it would be awesome, keep us posted. When do you think these will be available?

[nespharym]

[Terry335]

Sounds interesting, be happy to do some track testing for you.

[revah2]

what a bunch of junk

[CanadianTSi]

More cold air is always a good thing.

[zenmaster]

Ever notice that none of these CAI manufacturers bother to publish differences in intake-manifold air flow or temp between their units and stock setup?

[schneid4323]

its really not gonna do much

[ohsnap]

looks interesting if it works. i can tell ya the ram-air system on my zx-7r works like a champ..

[nespharym]

Originally Posted by schneid4323

its really not gonna do much

Even after reading the gains from the M5/M6s, and the gains from the first runs (we would have had better hp gains without the bent rim)...you still make such a sophmoric statement.

I really hope those who were bold enough to dispute the potential gains "Man-up" when the evidence resembles the M5/M6 gains.

[JoeT]

ram-air rock/pebble/detritus collector

[O-cha]

I'm going to guess that if these really helped BMW and every other car company would already have them on their car. Sure a lot of cars use ram air intakes, but they are much bigger than these little things, and even then its the consensus that they don't do much till around 80 and then not even all that much. Also, those cars intakes are about 35 times bigger than these little things.