[kjewer1]

If you are doing a reg, by all means go big on the pump. The 255HP (I have the regular version, the HP is better at high boost) is actually pretty decent, good to ~70 lbs/min using similar criteria to the examples above. And its cheap and a simple drop in. This is the first time I have heard that a supra pump doesnt allow use of the level guage though. A know a bunch of local guys with supra and cosmo pumps that still use the guage. Is it only a certain year or AWD/FWD configuration?

To simplify what I said before, here is what you are doing to figure this out. Find the flow of the pump at the fuel pressure in question using a flow graph or the numbers on RREs page. Then convert to gallons per hour (I have a program called "convert" that makes this a no brainer). Then convert to pounds per hour using the 6 lbs/gallon figure I mentioned, or to be more accurate, calculate the weight per gall on fo the fuel by using its specific gravity (density expressed as a percetnage of the weight per volume of water). Now you have lbs/hour fuel flow. Using your target air fuel ratio (AFR), you know that for that much fuel, you'll have more air. 12:1, you'll have 12 times more air, etc. So just multiply. Now you have lbs/hour of air. Divide by 60 to make that pounds per minute. Simple!