Quote:
Originally Posted by z3pilot99
I do understand the theory/reasoning of why a cai harms gas mileage. The thing that I question is the increase in mileage reported on the highway with this particular set up. This has been stated by many people that did this mod on the focus forum. I hesitate to call it ram air. So is there a confirmation a positive pressure in the airbox give a simular effect to a low pressure turbo, with possible mileage gains? Also, if I read the second post correctly it would be best to have a heated positive pressure in the airbox, right?
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A ram air effect might give you a few inches of water worth of pressure, nothing like the effect you get from a turbo.
Put it this way, the positive pressure effect from ram air is slow low I have not been able to measure it.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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