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      02-08-2009, 09:38 PM   #1
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Dyno'ed my M3 with and without RPI Air Scoops... results:

Don't have the graphs yet, should have them on Monday but yesterday I dyno'ed my M3 with my new RPI Air Scoops, high powered fans were used and 90mph wind was directed straight into the scoops and front grills. We did a total of 5 pulls just to get consistency and I had 374hp at the wheels BEFORE the scoops and 376hp at the wheels WITH the scoops. So with 90mph of wind the scoops are good for an extra 2hp at the wheels. I don't know where the hell people are getting 14 or 15whp from with the scoops but it's a cheap mod, nice little gain, and the red scoops look awesome behind matte black grills (i'll get pics soon).

FYI, I also have an Evosport pulley, Remus Race exhaust, and BMC air filter so that explains the 376hp as opposed to baseline.
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      02-08-2009, 09:42 PM   #2
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Not bad with a fan and auxiliary mods.
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      02-08-2009, 09:45 PM   #3
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Oh, also we got a video of my car being dyno'ed, i'll have my shop put it up on youtube on Monday.
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      02-08-2009, 10:18 PM   #4
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I got 7whp above 7k rpm, and like 15wtq from 2200rpm-3700rpm.
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      02-08-2009, 10:44 PM   #5
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Quote:
Originally Posted by MrHarris View Post
I got 7whp above 7k rpm, and like 15wtq from 2200rpm-3700rpm.

dude it is not possible ... post some dyno graphs... i call it BS
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      02-08-2009, 10:45 PM   #6
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Quote:
Originally Posted by Accord View Post
Don't have the graphs yet, should have them on Monday but yesterday I dyno'ed my M3 with my new RPI Air Scoops, high powered fans were used and 90mph wind was directed straight into the scoops and front grills. We did a total of 5 pulls just to get consistency and I had 374hp at the wheels BEFORE the scoops and 376hp at the wheels WITH the scoops. So with 90mph of wind the scoops are good for an extra 2hp at the wheels. I don't know where the hell people are getting 14 or 15whp from with the scoops but it's a cheap mod, nice little gain, and the red scoops look awesome behind matte black grills (i'll get pics soon).

FYI, I also have an Evosport pulley, Remus Race exhaust, and BMC air filter so that explains the 376hp as opposed to baseline.
yeah, one or 2hp is all what you'll get ...
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      02-08-2009, 10:58 PM   #7
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Wonder if the gains are actually from the filter?
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      02-08-2009, 10:59 PM   #8
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Quote:
Originally Posted by Cab5er View Post
Wonder if the gains are actually from the filter?
The filter was installed for both dynos, the only difference was the scoop, so it wasn't from the filter.
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      02-08-2009, 11:01 PM   #9
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Originally Posted by doba_s View Post
yeah, one or 2hp is all what you'll get ...
It depends at what speed, you aren't going to see gains at 10 mph, but these fans are not going to simulate air flow when a car is at highway+ speeds. I don't think any of us dyno in a wind tunnel.
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      02-08-2009, 11:03 PM   #10
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If you can't test in real world flow conditions you simply CAN NOT judge real world power improvements. That being said the difference between scoops and no scoops being in the noise here is absolutely not a surprise.

Let the great scoop debate begin again in full force....
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      02-08-2009, 11:08 PM   #11
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Quote:
Originally Posted by swamp2 View Post
If you can't test in real world flow conditions you simply CAN NOT judge real world power improvements. That being said the difference between scoops and no scoops being in the noise here is absolutely not a surprise.

Let the great scoop debate begin again in full force....

+1 here we go. I got the scoops, figure it can't hurt.

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      02-08-2009, 11:11 PM   #12
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Quote:
Originally Posted by swamp2 View Post
If you can't test in real world flow conditions you simply CAN NOT judge real world power improvements. That being said the difference between scoops and no scoops being in the noise here is absolutely not a surprise.

Let the great scoop debate begin again in full force....
You can get an idea, dyno's aren't 100% accurate anyway.

If a fan that does not produce real world air flow shows gains, the principle is sound.
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      02-09-2009, 01:09 AM   #13
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Let's see gains at all RPM not just peak gains. graphs plz
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      02-09-2009, 01:19 AM   #14
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Originally Posted by FStop7 View Post
Let's see gains at all RPM not just peak gains. graphs plz
It isn't the kind of mod that adds power at all points in the rev range at all times.
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      02-09-2009, 02:04 AM   #15
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Quote:
Originally Posted by Sticky View Post
You can get an idea, dyno's aren't 100% accurate anyway.

If a fan that does not produce real world air flow shows gains, the principle is sound.
Sure you can get an idea of how much hp you will gain IN THAT TEST with no real world air flow around the vehicle, which then can be positively correlated with real world hp gains or not, mostly depending on how much the mod in question relies on aerodynamic effects. Of course the intake in most modern/sporty cars relies heavily on aerodynamics as will intake related mods.
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      02-09-2009, 02:15 AM   #16
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The only way I can see gains of 10WHP+ is if the intake air temperature is reduced by a reasonable amount (say 10F).

Has anybody measured IATs with and without this mod?
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      02-09-2009, 02:29 AM   #17
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Quote:
Originally Posted by MrHarris View Post
I got 7whp above 7k rpm, and like 15wtq from 2200rpm-3700rpm.


o.O
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      02-09-2009, 05:51 AM   #18
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Quote:
Originally Posted by MrHarris View Post


o.O
The results are within the normal variances you can see from one run to another run on the dyno...

If you did five runs before and five after and that was the average run, OK there are some gains (and losses around 6500RPM) to be had, but I'm guessing that wasn't the case...
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      02-09-2009, 08:10 AM   #19
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This was after like 5 runs.
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      02-09-2009, 09:07 AM   #20
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haha only 2hp if you're going at least 90mph? waste of money.
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      02-09-2009, 10:57 AM   #21
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Quote:
Originally Posted by Sticky View Post
It depends at what speed, you aren't going to see gains at 10 mph, but these fans are not going to simulate air flow when a car is at highway+ speeds. I don't think any of us dyno in a wind tunnel.
I agree. I don't think you can duplicate the real-world effects of scoops on a dyno.
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      02-09-2009, 11:03 AM   #22
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Quote:
Originally Posted by PencilGeek View Post
What kind of dyno?
+1
My question as well!
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