Quote:
Originally Posted by Shawn 357
I can't see an issue with the air getting warmer because every compressor deals with this whether it is a supercharger (pick your type), turbo, or a standard air compressor. Obviously once you exceed a certain temperature it would loose its benefit but I don't see the air gaining that much temperature when the car is cruising at 2000 rpms (of course I haven't taken the time to figure out how long the air will remain in the cylinder, rate of heat transfer, etc.). You would have to have the computer automatically retard the timing ,increase the fuel injector pulse widths, and you may even have to use some type of intercooler to help shed some of that heat.
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There is no benefit, no more oxygen than the firing cylinders would get anyway. Flowing through the other cylinders ports reduces effiency by the restriction giving less oxygen & the oxygen it did get would be at a higher temp. I guess you could add an intercooler, but this would reduce effiency as well. Increasing the injector pulse widths would defeat the purpose, the extra fuel would have no more oxygen to burn & would just help with cooling, not power or mileage
Back in the 70s I read & saw pictures of a set up Crower Cams came up with to improve the milleage of a big block Chevy. Rocker arms were taken off on 4 cyl so the valves wouldn't open. Kind of oblong slugs instead of round pistons replaced the pistons so that the motor would not have to do the work of compressing air. I kind of thought a junkyard 283 with rings, inserts & valve job would be more cost effective, because of the big blocks recipcrocating & rotating mass.