Originally Posted by PMJ
Yes, same PMJ. I finally made it back to the track last weekend. I finally got my 10s run, but the slower throttle actually hurt more than it helped (I should have look closer at my logs while I was there).
The above log shows a nice gradual transition to WOT...this was on the street and I thought it was a good fix. As you can see in my first run at the track below, the slower throttle turned into a mess... I guess I was shifting too fast
. You can see I shift, floor it, the TPS opens rapidly to 50%+, then starts to close back down to 30%, and then flies open about as rapidly as I floored it originally and results in the exact same boost spike and lean spike...just took longer to get there.
I'm as confused as ever, but when I get this issue solved, I can take another .5s off my time!
I'm headed back to Victoria to see Pat G again. This time we are going with a SD tune in hopes of removing the lean spike.
A simple fix is to restrict the vacuum source to slow the closing of the bypass.
You can use a motorcycle carb jet in the bypass tube I would start around .030