Wideband tuning
11-27-04, 03:48 PM
#26
Originally Posted by RICE RACING
You can get a base line on a dyno (regardless of type) but all final triming is done to suit the track, wether and nature of circuit conditions. If you think that it comes of a dyno and performs perfectly onthe track or road you truley have no F*&king idea of what *professionals* actualy do to make engines perform in the real world 
Yes you need a dyno get a good tune. Engine or Chassis
And Yes you'll also need to have good datalog's while racing whether drag or circuit. without them i don't know how else you would do it. Sit of pants can only get you so far.
11-30-04, 06:17 PM
#27
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I think some of you guys are misinterpreting what I am trying to say here. I am not debating tuning methods. I am just trying to point out that scientifically, to tune for power, you need some type of device that indicates power. An AFR meter does not indicate power, and a dyno does. How you want to tune is up to you, but that does not change these facts.
Also, I fully understand the value of track/street tuning. However, this is performance tuning, not power tuning. As you know, there are many factors that will produce better track speeds, even though they may have nothing to do with the power of the engine. In some cases, the peak power of the engine is even reduced in order to make gains in other areas that will help the car produce better times at the track.
OK, first it was one AFR number, and now it's a range. What gives? I thought there was only one magic AFR number, kinda like in the Highlander movie. 
If I use the "inverse calculation", does that mean I'm old? 
BTW, I have seen data from piston engines producing best power at 0.83 lambda with pump gas, which is just outside of the range you posted.
Also, I fully understand the value of track/street tuning. However, this is performance tuning, not power tuning. As you know, there are many factors that will produce better track speeds, even though they may have nothing to do with the power of the engine. In some cases, the peak power of the engine is even reduced in order to make gains in other areas that will help the car produce better times at the track.
Originally Posted by RICE RACING
13.1:1 +- 0.3 AFR points will do you well
Originally Posted by bill Shurvinton
best power arrives at Lambda of between 0.85 and 0.9 (except in those days they used the inverse calculation so around 1.15.
BTW, I have seen data from piston engines producing best power at 0.83 lambda with pump gas, which is just outside of the range you posted.
12-01-04, 04:43 AM
#28
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Originally Posted by Evil Aviator
I think some of you guys are misinterpreting what I am trying to say here. I am not debating tuning methods. I am just trying to point out that scientifically, to tune for power, you need some type of device that indicates power. An AFR meter does not indicate power, and a dyno does. How you want to tune is up to you, but that does not change these facts.
Also, I fully understand the value of track/street tuning. However, this is performance tuning, not power tuning. As you know, there are many factors that will produce better track speeds, even though they may have nothing to do with the power of the engine. In some cases, the peak power of the engine is even reduced in order to make gains in other areas that will help the car produce better times at the track.
OK, first it was one AFR number, and now it's a range. What gives? I thought there was only one magic AFR number, kinda like in the Highlander movie.
If I use the "inverse calculation", does that mean I'm old?
BTW, I have seen data from piston engines producing best power at 0.83 lambda with pump gas, which is just outside of the range you posted.
Also, I fully understand the value of track/street tuning. However, this is performance tuning, not power tuning. As you know, there are many factors that will produce better track speeds, even though they may have nothing to do with the power of the engine. In some cases, the peak power of the engine is even reduced in order to make gains in other areas that will help the car produce better times at the track.
OK, first it was one AFR number, and now it's a range. What gives? I thought there was only one magic AFR number, kinda like in the Highlander movie.
If I use the "inverse calculation", does that mean I'm old?
BTW, I have seen data from piston engines producing best power at 0.83 lambda with pump gas, which is just outside of the range you posted.
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