Dyno problem, shake causes bad results
Thread Starter
Instructor
Joined: Jan 2011
Posts: 123
Likes: 11
From: France
Dyno problem, shake causes bad results
Hi,
here is my dyno chart
Uploaded with ImageShack.us
We had an important vibration, perhaps wheel shake with my Toyo R888. And this vibration comes when the curve goes down.
Do you have similar ?
here is my dyno chart
Uploaded with ImageShack.us
We had an important vibration, perhaps wheel shake with my Toyo R888. And this vibration comes when the curve goes down.
Do you have similar ?
Race Director
Joined: Mar 2005
Posts: 10,399
Likes: 26
From: Austin Texas
The dip in HP & TQ @ 5,000 RPM is probably from timing being pulled by a knock sensor. I had a similar problem on a Dyno when an exhaust pipe was vibrating against the frame, the computer saw the vibration as spark knock and pulled timing, cost me 25-30 HP that run.
Find out what is vibrating and secure it. When you re-Dyno the car the graph should smooth out.
Find out what is vibrating and secure it. When you re-Dyno the car the graph should smooth out.
