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03-16-2010, 06:03 AM | #1 |
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Stock Charge Pipe vs Envy Charge Pipe
This thread outlines the results of testing performed comparing the stock OEM charge pipe with the Tecnocraft Envy Charge Pipe.
Base Configuration of the Car
Measurement Tools
Testing Methodology
Results Stock vs Envy Power and Torque The results below are based upon ECU "Actual Torque" Actual Value. Note that SAE J1349 correction was applied to the results. Stock vs Envy ECU Acceleration The results below are based upon the ECU "Vehicle acceleration - sensor" Actual Value. Note that I am unsure of the scaling of the raw value, hence I have just presented the raw values obtained from the scan tool. Stock vs Envy Accelerometer Data The results below are based upon the acceleration data captured from iPhone 3GS Dynolicious LogBox tool. Stock vs Envy Air Fuel Ratio (Bank 1 and Bank 2) The results below are based upon the ECU "Lambda pre-catalytic converter" Actual Values. Bank 1 Bank 2 Stock vs Envy Intake Air Temperature The results below are based upon the ECU "Intake Air Temperature" Actual Value. To avoid heat soak skewing the results, all runs were performed immediately after a free run of a couple of minutes. Stock vs Envy Mass Air Flow The results below are based upon the ECU "Air mass flow rate bank 1 and bank 2" Actual Value. Conclusions
OVERALL A WIN TO THE STOCK CHARGE PIPE. The car does feel a bit stronger up top at the moment with the stock charge pipe and I won't be going back to the Envy Charge Pipe. One thing that is clearly apparent is that intake air temps with the stock charge pipe are better - cooler IATs = more torque and less likelihood of knock. I may consider the Dinan charge pipe at some stage but I think the BMW intake system as is, is pretty near perfect (except for the filter). Last edited by mixja; 03-16-2010 at 03:02 PM.. |
03-16-2010, 06:23 AM | #2 |
yodog
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Earthquake just woke me up. And wow interesting results.
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03-16-2010, 07:53 AM | #5 |
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So basically everyone who's bought this pipe has spent $650+ for an engine cosmetic mod? Doesn't that suck!
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03-16-2010, 08:38 AM | #6 |
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This my fellow forum member, Nursultan Tuleiakbay. He is pain in my assholes. I get a window from a glass, he must get a window from a glass. I get a step, he must get a step. I get a Envy Charge Pipe with no HP gain, he cannot afford. Great success!
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03-16-2010, 09:36 AM | #7 |
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Very useful info. Well, I guess I won't have to worry about the plaque anymore.
Just have a neutral/methodological question for everyone. How accurate are the measurement tools OP used as opposed to actual dyno numbers? |
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03-16-2010, 12:59 PM | #8 |
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03-16-2010, 02:28 PM | #10 |
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interesting results...
it might just be in my head..but I really felt power gain and especially response from my charge pipe... wonder what the deal is... i also have a hi flow drop in and scoops. |
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03-16-2010, 02:47 PM | #12 |
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03-16-2010, 02:49 PM | #13 |
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03-16-2010, 02:51 PM | #14 |
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Robert??
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03-16-2010, 02:52 PM | #15 |
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03-16-2010, 02:52 PM | #16 |
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Haha, this is what I have been saying all along. Fitment issues, no power gain. At least VTEC stickers don't the rub the paint off under the hood or cause potential intake leaks.
According to that IAT chart, the "Charge Pipe" takes in hotter air than the stock pipe (most likely due to its thinner CF construction and proximity to the hot engine). Last edited by smmmurf; 03-16-2010 at 02:58 PM.. |
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03-16-2010, 02:54 PM | #17 |
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Most stuff sold on this site is like that...crap! I mean, $650+ and not a single member ever asked for a dyno sheet!!?? That kills me.
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03-16-2010, 03:07 PM | #18 | |
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Quote:
A key point for me is the intake air temps - suggests the Envy charge pipe is more prone to heat soak or has lesser insulatory properties than the factory charge pipe. |
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03-16-2010, 03:07 PM | #19 |
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If I bought anything like this, I would be on the phone with Technocraft right now for a refund for false advertising and fitment issues (leaks, rubbing). The dyno video has never been replicated by any independent test. There was even one where Ed Lin lost power with the full system.
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03-16-2010, 03:09 PM | #20 | |
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Quote:
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03-16-2010, 03:29 PM | #22 |
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