output (readings) on different dynos
Yeah, You've Probably Never Heard Of Me.
iTrader: (21)
Joined: Sep 2003
Posts: 17,962
From: in a glass case of emotion.
Car Info: 345/30/19s
yes it can be quite dramatic, I put down 354 on a dynojet within an hour of putting down 305 on a mustang, so nearly 50whp there!
mustang dynos, like Dyno Dynamics dynos are load based which simulate driving much better than the dynojet, this is why most tuners prefer them
mustang dynos, like Dyno Dynamics dynos are load based which simulate driving much better than the dynojet, this is why most tuners prefer them
Registered User
Joined: Oct 2003
Posts: 388
From: AZ
I have a question then. If the dynojet reads 15% higher, then why did my car dyno almost the exact numbers everyone else gets for a stock set up? The average stock WRX puts down around 163-170whp. I put down around 164whp on a dynojet. So that doesn't seem true to me. If that is true about what you said, either my car is really jacked(hopefully not) or its just the dyno.
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iTrader: (7)
Joined: Dec 2002
Posts: 10,029
From: Sacramento CA
Car Info: 02 Impreza WRX sedan
Sport Compact Car magazine featured an AWD dyno comparo several months ago. It's difficult to convert the numbers from one dyno to another. Even identical models can be calibrated differently. Then factor in the ambient weather conditions such as Sacramento on a 100 degree day vs the SF Bay Area on a 70 degree day vs the high altitude of Denver CO.
For the WRX, you might have to take into account that stock cars may have a wider variance in output than normally aspirated cars. While most WRXs will put out within a few horsepower of each other, there will be some that will do far worse and others that are considered freaks because they do so well with no mods. Shiv Pathak, of Vishnu Performance, has found this to be true after testing dozens of stock WRXs at his facility using a Dyno Dynamics over the past several years.
--
0==WW==0
"…axles of evil…" - george w. bush
For the WRX, you might have to take into account that stock cars may have a wider variance in output than normally aspirated cars. While most WRXs will put out within a few horsepower of each other, there will be some that will do far worse and others that are considered freaks because they do so well with no mods. Shiv Pathak, of Vishnu Performance, has found this to be true after testing dozens of stock WRXs at his facility using a Dyno Dynamics over the past several years.
--
0==WW==0
"…axles of evil…" - george w. bush
Originally Posted by taerron
I have a question then. If the dynojet reads 15% higher, then why did my car dyno almost the exact numbers everyone else gets for a stock set up? The average stock WRX puts down around 163-170whp. I put down around 164whp on a dynojet. So that doesn't seem true to me. If that is true about what you said, either my car is really jacked(hopefully not) or its just the dyno.
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what people don't realize about dyno-ing a car is that there are many variables to consider. and when you take in mind that vehicle electronics is more advanced than ever, the computers controlling the engine just becomes more sensitive to all the sensors inputs. it is very hard to explain but it is also very easy to get false dyno readings by just not having the vehicles fluids at the correct operating temperatures. i am not good with words, here is a document that explains this in full detail;
http://dinancars.com/whitepapersFile.asp?ID=9
(sorry i'm computer illiterate and i don't know how to create a link)
http://dinancars.com/whitepapersFile.asp?ID=9
(sorry i'm computer illiterate and i don't know how to create a link)
Registered User
Joined: Oct 2004
Posts: 11
From: Austin, TX
http://www.germanmotorcars.com/Dyno_...0inertia_1.htm
The above is a link to a pretty good explaination of DJ numbers versus every other dyno manufacturer. Read closely and discuss.
BK
The above is a link to a pretty good explaination of DJ numbers versus every other dyno manufacturer. Read closely and discuss.
BK
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