AFR questions & Works P2
Originally Posted by jansolo
I am confused. Did anyone say that the Dynojet was load based?
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From: SF Bay Area
Marksae, What is the date of that dyno run? The peak torque is way too late. I think the load on the dyno has been adjusted differently since your dyno run was done.
Last edited by EM@WORKS; Jun 23, 2005 at 11:21 AM.
Originally Posted by EM@WORKS
Marksae, What is the date of that dyno run? The peak torque is way too late. I think the load on the dyno has been adjusted differently since your dyno run was done.
Originally Posted by EM@WORKS
Marksae, What is the date of that dyno run? The peak torque is way too late. I think the load on the dyno has been adjusted differently since your dyno run was done.
here is one taken the same day. Ooh look the peak tq location is different than Marks, couldn't be because its a different evo with different mods?
And another one taken a week later, same car, more mods and different tuning. Look, the peak TRQ moved again!
Last edited by razorlab; Jun 23, 2005 at 11:33 AM.
Originally Posted by razorlab
AHHAH, what the ?
here is one taken the same day. Ooh look the peak tq location is different than Marks, couldn't be because its a different evo with different mods?
here is one taken the same day. Ooh look the peak tq location is different than Marks, couldn't be because its a different evo with different mods?
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Joined: Feb 2005
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How are AFRs measured on the Dyno?
I know for wide-band meters such as Zeitronix, PLX etc. they recommend placing the sensor about 24 to 36 inches downstream of the engine block or turbo, basically screwed into the the DP just before the cat.
Has anyone here checked the AFR on their own wide-band during the dyno run (if that's possible?).
I know for wide-band meters such as Zeitronix, PLX etc. they recommend placing the sensor about 24 to 36 inches downstream of the engine block or turbo, basically screwed into the the DP just before the cat.
Has anyone here checked the AFR on their own wide-band during the dyno run (if that's possible?).
Originally Posted by razorlab
Exactly my point. Why did you post that showing AFRs if you know that isn't a load based dyno?
2. No one specified they wanted a chart from a load based dyno (until your comment).
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From: SF Bay Area
Dynojets are inertia based dynos. When doing sweep runs, there isn't much fudging/tweaking that can be done to change the results. Therefore they are usually very "honest."
Load based dynos require lots of time to calibrate properly and need to be constantly adjusted for different types of vehicles. The idea is to simulate your vehicle driving down the road (load) where most of your EVOs spend their time. Lots of datalogging needs to be done on the road to determine how to properly set-up the parameters for the dyno. And again, each vehicle is different.
Therefore there is a lot of variability with load based dynos depending on the amount of time invested in their set-up for each vehicle.
Load based dynos require lots of time to calibrate properly and need to be constantly adjusted for different types of vehicles. The idea is to simulate your vehicle driving down the road (load) where most of your EVOs spend their time. Lots of datalogging needs to be done on the road to determine how to properly set-up the parameters for the dyno. And again, each vehicle is different.
Therefore there is a lot of variability with load based dynos depending on the amount of time invested in their set-up for each vehicle.
Last edited by EM@WORKS; Jun 23, 2005 at 01:47 PM.
road data logging results
I spent several hours at Works this afternoon. They put my car on a lift, swapped in a test pipe, and hooked up all of their data logging equipment.
During a 3rd gear pull on a downhill on-ramp the AFR peaked around 11.79. During a 3rd gear pull on a slight hill with a shallow rise and fall the AFR peaked at about 11.3. During another run it was about 11.5 to 11.6 (I believe this was more of a flat road).
Therefore, when there was less load (downhill) the reading was a bit leaner. On the slight hill (more load) the reading was a bit richer. The readings were a bit richer than the dyno at all points. One of the biggest differences between the dyno and road logging was the shape of the AFR curve in the 5-7k rpm range. On the road data it is fairly flat, but on the dyno it climbs quickly.
Overall, Pete and the rest of the works gang believes my car is completely safe and I shouldn't worry about it. Now I can rest easy.
Pete, Tyler, and Jamie...thanks for your time and effort! You have reconfirmed why I chose Works in the first place
During a 3rd gear pull on a downhill on-ramp the AFR peaked around 11.79. During a 3rd gear pull on a slight hill with a shallow rise and fall the AFR peaked at about 11.3. During another run it was about 11.5 to 11.6 (I believe this was more of a flat road).
Therefore, when there was less load (downhill) the reading was a bit leaner. On the slight hill (more load) the reading was a bit richer. The readings were a bit richer than the dyno at all points. One of the biggest differences between the dyno and road logging was the shape of the AFR curve in the 5-7k rpm range. On the road data it is fairly flat, but on the dyno it climbs quickly.
Overall, Pete and the rest of the works gang believes my car is completely safe and I shouldn't worry about it. Now I can rest easy.
Pete, Tyler, and Jamie...thanks for your time and effort! You have reconfirmed why I chose Works in the first place
Last edited by TarmacEVO; Jun 25, 2005 at 08:06 AM.
Originally Posted by TarmacEVO
I spent several hours at Works this afternoon. They put my car on a lift, swapped in a test pipe, and hooked up all of their data logging equipment.
During a 3rd gear pull on a downhill on-ramp the AFR peaked around 11.79. During a 3rd gear pull on a slight hill with a shallow rise and fall the AFR peaked at about 11.3. During another run it was about 11.5 to 11.6 (I believe this was more of a flat road).
Therefore, when there was less load (downhill) the reading was a bit leaner. On the slight hill (more load) the reading was a bit richer. The readings were a bit richer than the dyno at all points. One of the biggest differences between the dyno and road logging was the shape of the AFR curve in the 5-7k rpm range. On the road data it is fairly flat, but on the dyno it climbs quickly.
Overall, Pete and the rest of the works gang believes my car is completely safe and I shouldn't worry about it. Now I can rest easy. If anyone wants to see some of the road data, then shoot me a PM with your email address.
Pete, Tyler, and Jamie...thanks for your time and effort! You have reconfirmed why I chose Works in the first place
During a 3rd gear pull on a downhill on-ramp the AFR peaked around 11.79. During a 3rd gear pull on a slight hill with a shallow rise and fall the AFR peaked at about 11.3. During another run it was about 11.5 to 11.6 (I believe this was more of a flat road).
Therefore, when there was less load (downhill) the reading was a bit leaner. On the slight hill (more load) the reading was a bit richer. The readings were a bit richer than the dyno at all points. One of the biggest differences between the dyno and road logging was the shape of the AFR curve in the 5-7k rpm range. On the road data it is fairly flat, but on the dyno it climbs quickly.
Overall, Pete and the rest of the works gang believes my car is completely safe and I shouldn't worry about it. Now I can rest easy. If anyone wants to see some of the road data, then shoot me a PM with your email address.
Pete, Tyler, and Jamie...thanks for your time and effort! You have reconfirmed why I chose Works in the first place
here are some graphs from the road logging
Originally Posted by razorlab
what was AFR up top?
Last edited by TarmacEVO; Jun 25, 2005 at 08:06 AM.
Originally Posted by TylerO@WORKS
Logging on the Road or a properly set up and calibrated dyno has show again and again that our AFRs are perfect. If anyone has any doubts feel free to come in and we will hook up all of our equipment so you can see the perfect AFR for yourself. Or head up to a dyno that is set up perfectly like the one at San Rafael Mitsubishi.
I'll quote my self from another thread:
/thread
I'll quote my self from another thread:
/thread