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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Another Procede v1.47 dyno..but this one compare K&N to stock airfilter!



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      12-10-2007, 03:21 PM   #1
Driver72
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Another Procede v1.47 dyno..but this one compare K&N to stock airfilter!

A test to see if the K&N drop in filter REALLY works.

So Terry and I met up today to dyno are cars.
I wanted a "baseline" dyno on v1.47 before I install my v2 PROcede and redyno a day or so later.

I decided to dyno on 92 Octane. Why? Why not, nobody has before. So I figure on 91 Octane I'd of made a bit less (-5 rwhp and rwtq),
and on 93 Octane I'd of made a bit more (+5 rwhp/rwtq).

My car is a 335i Coupe with 6AT transmission. I have 19" CSL reps and General tires. I had basically a full tank of 92 Octane (filled up 30 miles earlier).
My car has 3705 miles on the odometer.

The dyno operator did the first run and accidently went past the kickdown point.
He then he asked me if I wanted to do it since i was more familiar with the car.
I said sure, but on my first run, I pressed the pedal down kind of slow in fear of kicking it down so I don't think I got it fully down until I was like 3500 rpms,
so the torque reading was a bit low, but still managed a 331 rwhp and like 358 rwtq.
I let the car cool for 2-3 minutes and did it again, this time pressing the pedal down faster so it got on boost quicker...this time got:
331.77 rwhp
366.75 rwtq

Now, the big test, install the K&N Drop in Air Filter and redyno.
To be fair, since the car just ran two full dyno runs and a busted first run, I decided I'd let the car cool for about 10 minutes so it was not heatsoaked
and back to similiar temps the car was on the 2nd dyno run.

Well with the K&N Drop in Filter I got:
336.06 rwhp ( +4.3 rwhp)
368.47 rwtq ( +1.7 rwtq)

So I gotta say, for $60 the K&N Drop in Filter is WORTH it.
This may be the first independant test of a drop in filter on these cars that is NOT by someone who sells them.

Also, quick note. It would probably do more on the road.
The dyno had a 4 foot diameter fan place 6 feet in front of the car, but it blows wind at probably 20-25 mph....that's it.
If you are going freeway speeds and higher, there would be A LOT more wind blowing into the air box, probably making more hp.

Here's the dynos.
Blue run again is v1.47 6AT car on 92 Octane (all else stock)
Red run again is v1.47 6AT car on 92 Octane (with K&N Drop in filter).

Will post comparable v2.02 dynos soon too.
Terry will also post these up in comparison to his JB2H on 91 Octane with Catless DP's, with K&N Drop in filter on stock exhaust.
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Last edited by Driver72; 12-10-2007 at 05:13 PM.
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      12-10-2007, 03:28 PM   #2
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      12-10-2007, 03:32 PM   #3
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Oh, btw all.
On my 335i sedan with v1.4 on 91 Octane, on stock air filter with 2200 miles on the odo it dynoed:
313.8 rwhp
358.7 rwtq

Then I dropped in some race gas to make 93 Octane mix, rolled the car on the rollers for only about 2 minutes and dynoed and got:
325.34 rwhp
366.11 rwtq

With my sedan I think it would of been a couple higher with a bit more adaptation time (so say 328 rwhp and 368 rwtq).
But with my sedan it was 75 degrees out during the test.
With my coupe it was like 58 degrees out.

They were also on two different dynojets.

But you can see, these two dynojets are pretty consistent.

I think my Coupe makes a bit more hp, but again my sedan was on v1.4 (not v1.47 like the coupe) and it was also cooler when I dynoed the coupe.

But what really got me again was the fact that the K&N drop in filters REALLY do give you a bit more power and for $60 bucks are worth it.
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      12-10-2007, 03:36 PM   #4
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Good info as always.....
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      12-10-2007, 03:39 PM   #5
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Thanks!
As a cross reference, I noticed Terry just posted up his runs on his car which has JB2H on 91 Octane, K&N drop in, and UR Catless DP's here:

http://www.e90post.com/forums/showthread.php?t=100656
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      12-10-2007, 03:40 PM   #6
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Between these two dynos, and the info released by Dinan, this is a good forum day....
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      12-10-2007, 03:48 PM   #7
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Hey Terry, if you are around on Thursday, you should meet back up with me at the dyno again.
This time, dyno with JB2R on 95+ Octane with Catless DP's and stock exhaust.

What's another $50?
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      12-10-2007, 03:52 PM   #8
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Quote:
Originally Posted by Driver72 View Post
Hey Terry, if you are around on Thursday, you should meet back up with me at the dyno again.
This time, dyno with JB2R on 95+ Octane with Catless DP's and stock exhaust.

What's another $50?
Haha sounds fun, same time again? I need to burn off that 91 now!!!
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      12-10-2007, 04:01 PM   #9
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Quote:
Originally Posted by Terry335 View Post
Haha sounds fun, same time again? I need to burn off that 91 now!!!

Yeah, same time again.
Yeah, do you think you'll be able to burn off enough gas by Wednesday morning to make a 96 Octane mix?
If not, we'll do it on Thursday?
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      12-10-2007, 04:04 PM   #10
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Quote:
Originally Posted by Driver72 View Post
Yeah, same time again.
Yeah, do you think you'll be able to burn off enough gas by Wednesday morning to make a 96 Octane mix?
If not, we'll do it on Thursday?
I think Thursday is a better bet for me. More adaption time for you too!
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      12-10-2007, 04:09 PM   #11
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Quote:
Originally Posted by Terry335 View Post
I think Thursday is a better bet for me. More adaption time for you too!
Sounds good, see you Thursday.
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      12-10-2007, 05:15 PM   #12
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New title to the thread.

Also wanted to point out the point of the K&N Air Filter is to get a bit more air in the intake.
Ironically, or not so, if you look at the AFR of the car on stock air filter and K&N, the K&N is a bit leaner (more air) in certain areas that seem to match the areas where it shows the power gains (almost throught the whole rpm range). Seems like it does what it was suppose to do in letting more air in.
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      12-10-2007, 05:20 PM   #13
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Also notice that between 4600-6100 rpms there is a gain of roughly
15-18 rwhp
12-15 rwtq

and up at 6700 rpms (near redline) there is a gain of rougly

10 rwhp
5 rwtq

when using the K&N Drop in Air Filter.

I'd say it's worth spending $60 on a drop in air filter like the K&N.
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      12-10-2007, 05:21 PM   #14
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nice! thanks for the comparison
 
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      12-10-2007, 05:26 PM   #15
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That is awesome driver72, I have the same identical setup as you(minus the 19" wheels), I have the v1.47 plus the drop in K&n. If I have the chance I will also do my own dyno testing.

I will mostlikely run the car at the 1/4 mile with the k&N and post any improvement(if any)
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      12-10-2007, 05:31 PM   #16
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Nice. I have been waiting for someone to do this comparo
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      12-10-2007, 05:37 PM   #17
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can't wait to see your V2 dyno, nice numbers
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      12-10-2007, 05:38 PM   #18
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Quote:
Originally Posted by Driver72 View Post
Also notice that between 4600-6100 rpms there is a gain of roughly
15-18 rwhp
12-15 rwtq

and up at 6700 rpms (near redline) there is a gain of rougly

10 rwhp
5 rwtq

when using the K&N Drop in Air Filter.

I'd say it's worth spending $60 on a drop in air filter like the K&N.
great news re a cheap $60 mod... that gotta be the cheapest 5hp anyone will find for a 335.

1/ a question: alot of people were saying that the BMC filter was much better than the k&N. do u know if that was just some sort of hype, or was it backed up by dynos or something.
2/ do u have any thoughts on the soon to be released VIP intake/ or any of the other intakes out there? VIP is claiming something like 10whp i believe.

thanks
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      12-10-2007, 05:44 PM   #19
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you are right JB2 per hp is cheaper than the k&n....sorry terry!
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      12-10-2007, 05:53 PM   #20
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Quote:
Originally Posted by midlife View Post
great news re a cheap $60 mod... that gotta be the cheapest 5hp anyone will find for a 335.

1/ a question: alot of people were saying that the BMC filter was much better than the k&N. do u know if that was just some sort of hype, or was it backed up by dynos or something.
2/ do u have any thoughts on the soon to be released VIP intake/ or any of the other intakes out there? VIP is claiming something like 10whp i believe.

thanks

It's hard to say the difference between the drop in air filters.
HP Autoworks did the testing on the ITG filter and they showed/claimed a 3-4 rwhp gain.
So it seems the K&N and ITG are similiar in gains.
I'm not familiar with the BMC, but if it flows the same as the K&N I'd suspect similiar rwhp gains as well.

Any filter that flows MORE air than the K&N might give another 1-2 rwhp, but possibly at the cost of not filtering the air as well.

Also, keep one thing in mind. The K&N air filter on it's own showed a 4+ rwhp PEAK gain. But in certain rpm ranges showed 15+ rwhp gain.
AND, this was with just 20-25 mph wind being blown in front of the car.

Had there been 70 mph winds like you'd find at freeway speeds, I'm sure that peak gain could of possibly been several more rwhp greater.


As for the VIP Intake. Well I don't really know anything about it.
But I'd say, if it's an open element cone type filter that just sits atop the intake box, it will show good gains on a dyno for sure.
BUT, with the hood closed and a hot engine driving down the road, it's GOING TO suck in HOT, HOT engine air, and will probably do ZERO for power, and maybe actually do WORSE.

If it's a true Cold Air Intake system that sucks up cold air from the front of the car, and brings it into a closed intake housing (like the stock box) I'd say it would be worth double what the simple K&N drop in filter is worth.

In conclusion, if you want a decent performance gain for $60-90 pick up a high flow drop in AirFilter. If you twice that, and don't mind spending 4x the amount, I'm sure a TRUE Cold Air Intake system will give you 10+ rwhp on a dyno and even more on the open road.
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      12-10-2007, 05:55 PM   #21
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Quote:
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you are right JB2 per hp is cheaper than the k&n....sorry terry!
Hey, I deleted my post where I did the calculations....this thread is about K&N and PROcede....I felt it was off-topic.....
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      12-10-2007, 05:58 PM   #22
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Quote:
Originally Posted by SGP335i View Post
can't wait to see your V2 dyno, nice numbers

Thanks.

I'll actually be double testing it too.
Tomorrow I will be installing the v2.02 6AT map.

Before I do, we are going to dyno my car again while still on v1.47 (but at a different shop on a different dyno).
Then install the v2.02 run it on the rollers for just a minute or two, then let it cool for 10+ minutes and redyno with little adaptation time.

This way I have immediate before and after dynos from v1.47 to v2.02

Then on Thursday I will go back to the shop I was at today that I just got my v1.47 dyno and dyno again with v2.02 when it's had 2 days to adapt fully.

This way we can ALL see the difference between v1.47 and v2.02 on TWO different dynos, one immediately after the install and one after some adaptation time.

I think it will be a pretty conclusive test and what many have been waiting for....too see the difference between v1.47 and v2.02 on a car that has NO other power modifications (yes I will put the stock air filter back on with v2.02 too and then for the heck of it do the last run with the K&N again to see if I again get the same 4+ rwhp from it on v2.02 as well) .

Stay tuned!
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