I can monitor the same thing with my Laptop. It can track the opening of the secondaries and plot it versus rpm, load, tps, anything the PCM sees... It's part of the enhanced manufacturers data. I have tons of comparison charts testing different things. It's addicting... laugh

The bog is due to lack of intake velocity. You are basically starving the engine before the secondaries open the short runners.

I sing the praises of pinned secondaries. This winter I'll even be testing no secondaries.


2000 SVT #674 - Check it out!

Whoever coined the phrase; "If it ain't broke; don't fix it" ~ Just doesn't get it...