Just to add fuel to the fire.
I don't doubt that newer EGR technology will both enhance economy and reduce emissions. But. If you have ever disassembled a fairly high mileage late 80s or early 90s engine, even with good maintenence, the intake tract is disgusting. What does this do for economy and emissions in the later stages of engine life? I really don't know, but I doubt that it's good.
Ever try clean one of these engines up for rebuild?
Not fun.
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Robert
'95 Ford E150 4.9L I6 Megasquirt MS1 Custom MSnS Extra
'92 Winnebago Elante 33 RQ Ford 7.5L V8 Megasquirt MS1 Custom MSnS Extra
'93 Bayliner 3288 Twin Ford 5.8L V8s (351 Windsors) converted to tuned port EFI. Megasquirt MS1 Custom MSnS Extra
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