408 tuning with a Wideband sensor
Interesting graph. Since it's a nice cool night out and traffic is minimal, I figured that some more tuning was in order. I drove it to work and the last numbers I posted were pretty accurate. Anything above 50mph went rich to mid 12s. I enlarged the air bleeds another .002 for a total of .005. Doesn't seem like much but it's a 12.5% increase in area from the original size. I had to richen up the idle screws after this change because the idle was getting into the 15s. Slight adjustment and it's right in the mid 14s. Pretty much any cruising situation below 50mph yeilds AFRs in the low to mid 14's now. Time to move on to the main jets. Here's a little video at idle 1000RPM. Sorry for the horrible sound. Not sure why it came out that way.
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Interesting graph. Since it's a nice cool night out and traffic is minimal, I figured that some more tuning was in order. I drove it to work and the last numbers I posted were pretty accurate. Anything above 50mph went rich to mid 12s. I enlarged the air bleeds another .002 for a total of .005. Doesn't seem like much but it's a 12.5% increase in area from the original size. I had to richen up the idle screws after this change because the idle was getting into the 15s. Slight adjustment and it's right in the mid 14s. Pretty much any cruising situation below 50mph yeilds AFRs in the low to mid 14's now. Time to move on to the main jets. Here's a little video at idle 1000RPM. Sorry for the horrible sound. Not sure why it came out that way.
[/ame][/IMG]