ok, just in case you misread, I did

not say that you need 16LPM of gas, I'm just wondering out loud. For all I know that could either eat your engine, or be enough gas to really make a significant difference on your fuel cost per mile in your cat which is probably over $0.46 .

Please report your fuel economy on your cat. If diesel is $2.80 a gallon and you're getting 6 mpg and 100,000 miles per year that means you spend $46,000.00 a year on diesel fuel. If you only get 0.5 mpg boost, you save yourself $3,000. If you get a 42% increase (holy cow) you'd be getting 8.52 mpg. If you manage that, come up to northern Michigan and carry away the load of bricks I create when you shave $14,000 off your fuel tab.

If you have a 3 liter gasoline engine with vacuum (due to a throttle), you have at

most 2.8 liters of air enter the engine every 720 degrees of crank rotation. If you have a turbo running 14psi (ambient air pressure) then you have ~6 liters of air enter the engine every 720 degrees of crank rotation because you've doubled the air mass. This could mean a couple of things, that when your turbo boost is low, say idling, you at that moment need to have at

most7LPM for your 0.5lpm per liter displacement ratio.

And that when you're climbing a hill and your boost goes up to 20psi, your cat could breathe possibly 20lpm of hh0. And all of my postulating is

if you need or can handle 0.5 LPM of gas per liter of air

displacement.

Please keep mind this is mostly armchair pundit postulating.

(10-18-2009 06:56 AM)77 chevy k30 Wrote: Ok, now were talking shop. I only have a single turbo. As far as the max boost my truck never came with boost gauge. How do u figure how many liters a engine is based on boost pressure? i would guess then i need 16 liters a min then. does anyone else seem to have any insight on this subject how about this guy mike that runs this sight? all the same peopleand kits, quoted me there new S dry cell 30-40 lpm kit with pwm and flow pump and all other stuff @30-40 amps. and suppossedly gauranteeing 42% increase in MPG. I saw onof the youtube videos were the mnufacturer(hybrid conversions) was bein used by the city in wisconsin. the local news ws interviewing the city employees. anyone herd ofthese guys and any positi or negative feedback?

(10-17-2009 09:18 AM)Smudge Wrote: Ok, that's 0.5lpm naturally aspirated which is under some vacuum at all times.

Your cat runs at 18 or higher psi continually, some new cats run 2 turbos in series for roughly 50 psi.

Your cat sucks as much air as if it were a 32L naturally aspirated engine.

Does that mean you need 16lpm of gas? That's a second alternator's worth of amps.