PSI or Whipple?
#15
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Location: lake charles LA
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Either one works good, we ran Whipple R980 and A980 on my drag car, now PSI. and got a couple boats with R980's. Dont have to turn the whipple as hard, if you are talking about the old ones. The PSI is about 30 lbs lighter and looks better.
I like carbs because I can fix those and dont have to mess with calibrations.
I like carbs because I can fix those and dont have to mess with calibrations.
#16
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#17
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Location: Fresno, CA, 93722, USA
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On common marine engines, below 1600hp, they will take close to the same power, but have cooler temps. Ours makes far more low end torque and has significantly better fuel/air distribution and idle characteristics. You can't idle a 7.5L PSI gas version down to 800rpm. Not that many want too, but we have plenty that do.
#18
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Ya, thats really, really not true. We had to open up some clearance for applications that don't run the fuel through the SC so now we have "dry" and "wet" clearances. We also have "race" and "pleasure".
#19
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PSI's housing design is horrible, the inlet is 100% wrong for performance, which is why everyone in the drag world modifies them. Rotors need to be sealed as they move air through the housing. Compression is increasing as the air moves axially through the housing, therefore you lose compression and airflow as the rotor goes by the open portion of the housing.