can someone interpret dyno sheet?
Thread Starter
Moderator
Joined: Jun 1999
Posts: 7,117
Likes: 51
From: Dove Mountain Arizona
can someone interpret dyno sheet?
3 pulls, apparently this is the average. He said it was very rich.
http://i33.photobucket.com/albums/d6...ttedyno001.jpg
http://i33.photobucket.com/albums/d6...ttedyno001.jpg
Drifting
Joined: Jul 2002
Posts: 1,820
Likes: 283
From: Puyallup WA
It is kind of hard to make out.
If I am reading it correctly your low A/F was 9.4 with the average being 10.3. This is EXTREMELY rich. Your A/F should be between 12.5:1 and 13.5:1 for maximum power.
You are leaving a good amount of power on the table.
What type of chassis dyno was used?
Steve
If I am reading it correctly your low A/F was 9.4 with the average being 10.3. This is EXTREMELY rich. Your A/F should be between 12.5:1 and 13.5:1 for maximum power.
You are leaving a good amount of power on the table.
What type of chassis dyno was used?
Steve
Drifting
Joined: Jul 2002
Posts: 1,943
Likes: 1
From: Rosemount MN
What is it you're dynoing...
Have to agree about too rich, although best power is obtained between 11.0 and 12.0 AFR.
Did you have tire slippage or shift during the dyno run.
Can you scan the dyno sheet so it's easier to read ?
Have to agree about too rich, although best power is obtained between 11.0 and 12.0 AFR.
Did you have tire slippage or shift during the dyno run.
Can you scan the dyno sheet so it's easier to read ?
Le Mans Master
Joined: May 2006
Posts: 9,993
Likes: 1,136
From: League City Tx
Ya that thing is rich as sh*t. You need the AFR between 12.5-13.2 to 1 for the most power on a naturally aspirated motor. You are probably losing 20hp with the AFR in the 9-10 range. You need to tune that baby...
Thread Starter
Moderator
Joined: Jun 1999
Posts: 7,117
Likes: 51
From: Dove Mountain Arizona
Originally Posted by 632C2
It is kind of hard to make out.
If I am reading it correctly your low A/F was 9.4 with the average being 10.3. This is EXTREMELY rich. Your A/F should be between 12.5:1 and 13.5:1 for maximum power.
You are leaving a good amount of power on the table.
What type of chassis dyno was used?
Steve
If I am reading it correctly your low A/F was 9.4 with the average being 10.3. This is EXTREMELY rich. Your A/F should be between 12.5:1 and 13.5:1 for maximum power.
You are leaving a good amount of power on the table.
What type of chassis dyno was used?
Steve
Drifting
Joined: Jul 2002
Posts: 1,820
Likes: 283
From: Puyallup WA
I would invest in a Air/Fuel meter such as DynoJet Wideband Commander or the LM-1 from Innovate Motorsports. I have both of these but prefer the DynoJet Wideband Commander due to the analog gauge as opposed to the digital readout of the LM-1.
The other thing to do would be to find someone with a DynoJet that might be persuaded to help you dial in your carburetor.
Steve
The other thing to do would be to find someone with a DynoJet that might be persuaded to help you dial in your carburetor.
Steve
Le Mans Master
Joined: May 2006
Posts: 9,993
Likes: 1,136
From: League City Tx
Originally Posted by 632C2
I would invest in a Air/Fuel meter such as DynoJet Wideband Commander or the LM-1 from Innovate Motorsports. I have both of these but prefer the DynoJet Wideband Commander due to the analog gauge as opposed to the digital readout of the LM-1.
The other thing to do would be to find someone with a DynoJet that might be persuaded to help you dial in your carburetor.
Steve
The other thing to do would be to find someone with a DynoJet that might be persuaded to help you dial in your carburetor.
Steve
You can also get a digital gauge with log start button for the LM1. It has a digital AFR read out, along with a bar graph. It also has the button that you can activate the log with. Its about $250 though... it does plug right in to the LM1s analog channel
