Quote Originally Posted by Skinny Pedal View Post
Its a tuning site, we know what happens when you move the O2s further down stream with long tubes. Well, what needs to happen anyway.
I think only a handful of people truly understand this and I've yet to find folks willing to share their knowledge. Perhaps you could visit Barry's "Idle BLM" thread under "GM EFI Systems." Several of us are running the 7427 ECM and could use some help understanding what changes are needed to eliminate surging when running headers and larger cams.