[christofoo]

Hmm. I'm on the lookout for a throttle-loss-reduction method for the masses.

After reading the opening post it occurs to me that some kind of active EGR control system add-on might qualify, but I've got a question I want to throw out:

Would such a thing be considered tampering with an emissions control system, and thus be illegal?

If the answer is yes, I think a longer answer is that if emissions were not physically increased, presumably such a device could get tested and receive clearance with the EPA as an aftermarket device. (Although from my point of view regulatory clearance requirement is undesirable, if it's avoidable.)

(Sorry for the side-track.)