Ive got a sb 350 that I bought brand new from GM and put in my 1984 Chevrolet K10. The entire top end of my motor is all Edelbrock including a 10inch air cleaner assembly. All Ive got is a 4inch tall paper filter in it. Im only getting about 10mpg with it timed correctly and the carb set to a leaner fuel mixture. It does have larger than stock tires and weighs in about 5,600 though. I noticed the other day that with the hood shut my cleaner is only about 1/2 inch from the lowest part of the hood. I wondered that with it that jammed in there was the air cleaner drawing in too much warm are from inside against the hood.
I was looking at getting parts of a modular cold air intake system by Spectre that you can use to build your own custom intake The setup would run me about $135-150. Would this be a worth while investment or is it gonna suck gas with or without a cold air intake.
Cold air intake is a performance issue and is usually associated with some horsepower gain, not mpg. A cleanable K&N air filter will supply more air than a paper filter.
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