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Re: roots blower
They are not quite as effecient (adiabatically) as the twin screw Whipple. They say 100/100 on a stock engine. With the cam and headers/exhaust I'm up to about 375 HP/420 ft-lb at the motor (reverse calculated from the rear wheel dyno estimating a total of 20% parasitic losses). At the time I think the whipple was like $4000 USD new and this B&M one was $1900 USD all inclusive. That's pretty much why I bought it because it was 1/2 the price. Don't forget, these are the old TBI engines so it takes a little more effort to make good power numbers yet still keep it emissions compliant. The injectors are one of the bigger issues.
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