b17 with wavy torque plot
Thread Starter
Honda-Tech Member
Joined: Oct 2006
Posts: 772
Likes: 0
From: Los Angeles, CA, United States
b17 with wavy torque plot
Torque and corresponding air fuel for runs 1 and 2
horsepower and torque for run 3
B17, 200k miles, bolt ons. Lots of people were asking about the wavy low end torque and the spike at 4700rpm. VTEC crosses at 5700rpm.
Honda-Tech Member
Joined: Mar 2002
Posts: 9,854
Likes: 4
From: Southern California, U.S.A.
Re: b17 with wavy torque plot
Nothing wrong with your torque graph, other than the numbers are a bit low. Look at the resolution-your torque curve is pretty flat-between 80-95 ft-lbs. The spike at ~4,500 looks like the typical AEM CAI intake resonance hump, nothing to be concerned about. Your A/F looks like the map from a stock ECU-not a custom tuned map.
Honda-Tech Member
Joined: Feb 2004
Posts: 1,596
Likes: 0
From: Southern Cali, CA, USA
Re: b17 with wavy torque plot
i've noticed that dynamometers produce wavy torque graphs like that. I have been going to shawn at church automotive testing for years now and have had around 5 engines dynoed there. all of my torque graphs look wavy like that. i'm not sure why, but i'm assuming that it might have something to do with the chassis dyno.
by comparison, after i had a few of my motors dynoed at church, i would go to a roller dyno just to see the difference in numbers. the torque graphs looked much more smooth and flat, like we are all so used to seeing.
by comparison, after i had a few of my motors dynoed at church, i would go to a roller dyno just to see the difference in numbers. the torque graphs looked much more smooth and flat, like we are all so used to seeing.
Thread
Thread Starter
Forum
Replies
Last Post
