Whipple application on Duramax - Pressure Ratio

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inline6power said:
jgsturbo is correct. it takes almost 275ish hp to run our little 8-71 on our blown alky 565 at 50% over driven it makes only 18psi. it takes almost zero hp to run the newer whipples these days. the old 980r whipples that are the size of a trashcan make HUGE power but are HUGE blowers and weight a ton. we just put a 8l whipple on and its AMAZING how much power you gain just going from a roots to a screw. its WAY more effiecient and makes a TON more power. with the 8-71 we were at 1720hp and with the whipple at 20psi is just at 2k. we also have a procharger setup on a little 383 and its a F1R and its more effiencient than a roots only because its a true compressor as well. a roots in only a air pump. i have seen many many whipples and psi c rotors turn near 60psi.
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So you do have personal experience with a whipple at 60psi? That gives me hope. Was this with the 305(5 liter) or the old 9.8L whipple?
 
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