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Old February 22nd, 2004, 04:28 PM   #1
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Thumbs down How dynos can be faked

I was searching on Google for something and found a very good article.

http://www.turbomagazine.com/tech/0402tur_punkdyno/

Basically the article shows how dynos can pretty much be rigged by dyno operators to show whatever outcome they're trying to get. This is why I tend to take vendor dynos like a grain of salt. Their motivation is to sell their product and make the gains look as good as possible. To do that, they'd want to make the baseline dyno as pessimistic as possible, and the "after" dyno as optimistic as possible. Some companies may do that, while others may not.

But because dynos are so easy to rig, the only way you really know what you're gaining (or not) from mods is by doing your own independent dynoing. Too many people just see some vendor dyno and then accept that baseline and the gains as the "gold standard" when the dyno might not even be accurate in the first place, especially if there are any question marks raised. Again, this just reinforces the importance of independent dyno testing.


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Old February 22nd, 2004, 04:33 PM   #2
 
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Yep, this happened with my car and AEM's priliminary testing of the V2 for the 6th Gen.

My base dyno, and their base dyno were alot different. I didn't have the money or time at that time to do my own independent testing, ubt didn't really care too much, because I got the product for F-R-E-E
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Old February 22nd, 2004, 04:49 PM   #3
 
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I remember that article in the Turbo magazine (friend has subscription) about the 350Z that they took to different dyno's to see what would happen. After reading it I had the impression that it was just human error at the shops for the inconsistent readings. I had no clue some places did it intentionally, sad .



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Old February 22nd, 2004, 07:39 PM   #4
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Quote:
Originally posted by Ei-ccord on February 22nd, 2004 at 06:33 PM

Yep, this happened with my car and AEM's priliminary testing of the V2 for the 6th Gen.

My base dyno, and their base dyno were alot different. I didn't have the money or time at that time to do my own independent testing, ubt didn't really care too much, because I got the product for F-R-E-E
So does that mean the AEM V2's gains aren't as great as their dynos show? (If you're afraid AEM won't like your reply you can PM me )

I swear that I felt decent gains after I installed the V2 but maybe it was all in my head since I read the dyno beforehand.
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Old February 22nd, 2004, 08:58 PM   #5
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That's why I don't believe the dynoes for the UR pullies and other companies.
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Old February 23rd, 2004, 12:55 AM   #6
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There's no way pullies can give you 20WTQ in the low-end and mid-range like UR's dyno shows.
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Old February 23rd, 2004, 01:20 AM   #7
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Originally posted by TH23 on February 22nd, 2004 at 11:55 PM



There's no way pullies can give you 20WTQ in the low-end and mid-range like UR's dyno shows.
Also, all those gains are peak gains that are at one set point in the RPM band. That is how most people think that their headers, intake, and exhaust gets them 50 extra hp.
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Old February 23rd, 2004, 01:21 AM   #8
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good thread, stevtec
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Old April 26th, 2004, 09:56 PM   #9
 
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I think one thing that everyone should get out of this is that dynos are great tools for TUNING your car if you use the same dyno and keep the conditions similar. It's not about bragging rights or anything like that. One dyno can show 210hp and another can show 220hp for the same car in the same conditions. Hopefully everyone on here realizes that and uses dynos for their intended purpose: tuning.
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Old April 27th, 2004, 09:32 AM   #10
 
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Here is another article on the same topic. Its based off a PT Cruiser so that is why it is mentioned so frequently. This is a company that did individual tests on various aspects of "bolt-ons".

Dyno tests
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Old May 12th, 2004, 11:57 AM   #11
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I love this thread! I always knew aem was fulla **** ... its a pipe with a filter on it ... no better than an ebay generic!
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Old May 12th, 2004, 12:02 PM   #12
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i read that article. good article
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Old May 28th, 2004, 01:15 PM   #13
 
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Great Post. Thats the beauty of Forum based web-sites like V6P so only a few of us have to suck up a bad aftermarket part.
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Old July 16th, 2004, 08:21 AM   #14
 
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This is awesome.
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