|
|
03-16-2010, 03:39 PM | #23 |
Colonel
253
Rep 2,091
Posts |
This comes as no surprise to me. Good info!
__________________
2012 Audi R8 V10TT| 6MT| Suzuka Grey
2015 Ferrari 458 Speciale| Rosso Scuderia 2020 BMW X7| Mineral White 2024 718 GT4 RS | Arctic Grey |
Appreciate
0
|
03-16-2010, 03:42 PM | #24 |
80 Deep, We All Eat!!!
66
Rep 643
Posts |
All I can say is, wow. That's pretty crazy... Oh well. Win some, lose some. Where's the technocraft rep??? Eric from PYSpeed?? I'd love to hear what you all have to say about these independent test results....
Last edited by pumper206; 03-16-2010 at 04:00 PM.. Reason: In addition... |
Appreciate
0
|
03-16-2010, 07:20 PM | #25 |
Captain
50
Rep 780
Posts |
I think overall it would be safe to say that the charge pipe provides no measurable performance gains ON THE ROAD based upon the results. The results may be different on a dyno - perhaps on a dyno with insufficient air flow, the larger volume of the Envy charge pipe might help? Who really knows...
In terms of performance, I wouldn't hand on heart say the stock charge pipe performs better as there are other factors that can affect acceleration results from road testing (e.g. is the road perfectly level, are small bumps in the road amplifying peaks/troughs in the acceleration data). My impression is that the car FEELS faster with the stock charge pipe, but my perception likely will be heavily influenced by the results I obtained. So two things that are clear from this:
|
Appreciate
0
|
03-16-2010, 09:39 PM | #26 |
80 Deep, We All Eat!!!
66
Rep 643
Posts |
Makes me feel a bit taken advantage of....The charge pipe seemed practical at the time of purchase but now doesn't seem to be after your testing. By the way, thanks for posting your results and going through all the trouble.
|
Appreciate
0
|
03-16-2010, 10:15 PM | #27 |
Scared money don't make money.
67
Rep 1,448
Posts
Drives: 2009 E92 M3 DCT
Join Date: Apr 2009
Location: Irvine, CA
|
Sorry pal , these results are a surprise to me as well.
__________________
2009 E92 M3/DCT/Alpine White/Fox Red/Carbon Leather OE Tuned 402 whp & 303 wtq/Gintani X-pipe/MXP Axle Back/Rogue Pulley/AFE Stage 2/Cosmetics By IND & EAS HUGE THANKS: Gintani, OE Tuning, and EAS |
Appreciate
0
|
03-16-2010, 11:42 PM | #29 |
Captain
50
Rep 780
Posts |
|
Appreciate
0
|
03-17-2010, 01:51 AM | #30 |
Moderating
418
Rep 2,047
Posts |
so does a noisy exhaust make you think you are going faster when you you gain like 3 hp. Go figure, we are all suckers, we want to believe as otherwise we vomit at the thought of throwing money away
|
Appreciate
0
|
03-17-2010, 01:53 AM | #31 | |
Moderating
418
Rep 2,047
Posts |
Quote:
|
|
Appreciate
0
|
03-17-2010, 02:33 AM | #32 |
Major
55
Rep 1,113
Posts |
not a surprise to me either. thanks for taking the time.
without trying to sound like a hater, i can't believe so many people bought into this from a performance perspective. as a cosmetic mod, it's nice though. |
Appreciate
0
|
03-17-2010, 03:05 AM | #33 |
Smashed!
84
Rep 1,309
Posts
Drives: 2009 E92 M3
Join Date: Oct 2008
Location: Socal
|
Now I want to see some testing like this on a Dinan charge pipe!
Thanks for sharing!
__________________
est. 2008
BBS | BREMBO | RECARO | ig: @euro_rad |
Appreciate
0
|
03-17-2010, 03:08 AM | #34 | |
Colonel
309
Rep 2,189
Posts |
Quote:
A) Simulates real world performance better than actually driving the car ON THE ROAD? B) Would benefit the stock pipe moreso than the Envy pipe? If so, why? Is it because the fan might cool off the heat soak-prone Envy when the hood is up? (again not representative of real-world conditions) |
|
Appreciate
0
|
03-17-2010, 03:43 AM | #35 | |
Moderating
418
Rep 2,047
Posts |
Quote:
Give the guys a chance to answer this, no point in crucifying them until all angles are covered and debated. I liked my Envy when I had it for a whole 6 days, went FI so had no need to keep it |
|
Appreciate
0
|
03-17-2010, 04:44 AM | #36 |
Private
8
Rep 95
Posts |
This testing is really appreciated. At least we agree it looks quite good.
I am dubious that the scoops will do any better, and they really are difficult to accurately/scientifically test. The stock air comes straight in and up from the driver side bumper intake, and it's large. The scoops attach to a less direct airpath where they must make some 90-degree turns through smaller diameter tubing. I just can't see scoops helping at all. You have to make sure the main bumper intake is fanned just as much as the scoops when you test or the results will be BS. Before initiating, you should hold a hand-held anemometer in front of the scoops and the main driver side bumper intake to make sure you're distributing that air fairly.
__________________
e90M3, sold: Akrapovic // Brembo // VRS // Eisenmann // Advan RS // ESS // Challenge |
Appreciate
0
|
03-17-2010, 04:48 AM | #37 |
Private
8
Rep 95
Posts |
Have you decided which software you're going to use with the catless pipes??
__________________
e90M3, sold: Akrapovic // Brembo // VRS // Eisenmann // Advan RS // ESS // Challenge |
Appreciate
0
|
03-17-2010, 06:45 AM | #38 | |
Colonel
309
Rep 2,189
Posts |
Quote:
Forced air effects make very little difference once you go past the stock airbox. The greater factor would be intake air temperatures which are logged to be higher with the uninsulated pipe compared to the superior stock one. |
|
Appreciate
0
|
03-17-2010, 07:02 AM | #39 |
Brigadier General
125
Rep 4,971
Posts |
I am a little skeptical of a Virtual Dyno based on PG's findings. Having said that if you could share how you made your calculations I would love to give this a shot. I have the BT and a iphone, so this could be fun. I think I will reserve real dyno numbers for judgment though. Nice work.
|
Appreciate
0
|
03-17-2010, 09:30 AM | #40 |
Colonel
93
Rep 2,528
Posts |
It's probably because you were pressing the gas pedal with your "fast" sneakers on.
|
Appreciate
0
|
03-17-2010, 09:32 AM | #41 |
Colonel
93
Rep 2,528
Posts |
|
Appreciate
0
|
03-17-2010, 03:33 PM | #43 | |
Captain
50
Rep 780
Posts |
Quote:
The issue with Virtual Dyno is that the configured torque limits in the ECU for whatever reason affect the "Actual Torque" values that are output. I've seen this in person whereby my original Powerchip tune did not have high enough torque limits configured. In this state the ECU was reporting the engine was making close to 500HP uncorrected. Since I have had the torque limits fixed, the ECU is now reporting making around 450HP which is far more believable - but this shows how the torque limits affect the "Actual Torque" values. So this most definitely throws into question the accuracy of the values in absolute terms, however in relative terms, I think it is reasonable to assume that as long as the ECU tune remains constant, the "Actual Torque" values can be safely considered accurate as a relative measure. In absolute terms, I would certainly take notice of the other values that are actual measurement-based values - e.g. intake air temperatures, air fuel ratios...without these being fairly accurate in absolute terms, the engine would not actually be able to perform correctly. On the iPhone side, have a look for Dynolicious Log Box in the App Store - it is basically a logging application that logs accelerometer and GPS data and can log up to 100 samples per second. You can export the data and then use the raw data for whatever purpose you need. Note that the acceleration values presented are not corrected whatsoever - the correction factor for the stock pipe was actually slightly lower than for the envy pipe so applying them would have worked in the stock pipe's favour. |
|
Appreciate
0
|
03-17-2010, 03:55 PM | #44 | |
Brigadier General
125
Rep 4,971
Posts |
Quote:
Great - thanks for the info - I will play around with it. I have Dynolicious and the Log Box app already. I am not sure though is is calibrating for me properly though. I played around with Dynolicious last fall and all my numbers were very inconsistent. I tried it with a stock filter, then an AA filter, then a MS filter - all pretty much the same results (418-425). Then I added an AA exhaust and still in the same range. I have not played around with the Log box yet though so I will see how that goes. Cheers |
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|