Tuning without a dyno?
Thread Starter
Racer
Joined: Feb 2005
Posts: 320
Likes: 1
From: San Jose CA
Tuning without a dyno?
I have a question for the tuners here. How well can a car be tuned where, instead of having the car on a dyno, the car is actually driven to log the data? Doesn't that mean whoever is logging the data needs to run the car up to redline at WOT somewhere?
Racer
Joined: Jul 2005
Posts: 274
Likes: 0
From: oklahoma
Yes, the track is the place to do this. Will you be tuning by way of a laptop?
Regardless, at the dragstrip ET's can "lie" to you....excess Tq can cause wheel spin and lower ETs even though you are producing more power. Your MPH will give a more accurate reading, although it can be increased by wheel spin off the line.
I figure you will tune with the traction control on? If so the ET may be a better place to look, although I've not done any tuning with traction control.
Hope this helps!
Regardless, at the dragstrip ET's can "lie" to you....excess Tq can cause wheel spin and lower ETs even though you are producing more power. Your MPH will give a more accurate reading, although it can be increased by wheel spin off the line.
I figure you will tune with the traction control on? If so the ET may be a better place to look, although I've not done any tuning with traction control.
Hope this helps!
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Originally Posted by Virt
I have a question for the tuners here. How well can a car be tuned where, instead of having the car on a dyno, the car is actually driven to log the data? Doesn't that mean whoever is logging the data needs to run the car up to redline at WOT somewhere?
1. Drivability - where we actually drive the car and tune the car so it feels good
2. Dyno - once the drivability is good we'll throw it on the dyno for the WOT runs, this approach works pretty well and cuts down on the dyno time needed
