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Not a fair comparison. I believe he explains in the book that with the 3-carb intake manifold, the center carb ducting tied the two rotors together more or less at the block, killing all possibility of tuning (or even de-tuning the intake). The injection manifold properly tunes the intake based on Mazda's research.
Charlie
Jeff Whaley wrote:
Your question is best answered by Tracy; however, if I remember Tracy’s literature correctly, he went from an estimated 160 hp (with Mikuni carbs) to an estimated 180 hp with his first implementation of EFI … if these numbers are correct then it’s 180 / 160 or about 12.5% increase.
Jeff (engine running again after forced rebuild)
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*From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] *On Behalf Of *kevin lane
*Sent:* Monday, July 23, 2007 2:01 AM
*To:* Rotary motors in aircraft
*Subject:* [FlyRotary] last time, i promise - carb vs EFI
I still never got an answer to my original question; how much more power comes from EFI vs. carb? or is it a case that efi is just better tuned at all rpms since it has so many easily controllable parameters? does efi produce an optimum mixture and finer fuel droplets that can't be matched by the carb? if it does produce more complete burning and efficiency, how much? I hear these type stmts, but never numbers. are we talking 5%, 10%, 20%? kevin (renesis in my future :-)
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