My RX7SP build up

[RICE RACING]

Originally Posted by project86

haha thank you. often times i wish the U.S. would just switch to metric...after all i believe we are the only country using standard measurements haha.

either way im seriously impressed by this. The entire time ive been into rotaries (only since about 05-06 to present) ive been under the impression that the only way to gain power really is to start porting. and i suppose thats under the assumtion of more air in more air out+more fuel= more power. but you have clearly blown that out of the water.

Question... Would there be any benefit to doing water inj on a naturally aspirated platform?

Turbochargers are a great device, for only marginal *very marginal* increases in pressure you get great gains in power (through vastly increased air flow), much more so than what you can achieve with any type of trivial porting, so its pretty pointless making the engine worse in response and power band and run only XYZ "fixed" boost pressure..... that is what took me a long time to acknowledge as well, so you are not alone there. Lots of people are under the misconception that you need to port to make prodigious power and nohting could be further from the truth. It's not as if I am using outrageous boost levels either, you can see the listed performance I am willing to share is under moderate boost pressures and it still compares well to fully race ported examples, running gutted non leagl exhausts etc.

WI can work on anything that is knock limited, so for NA it ould have to be running very high compression that mandated a non ideal spark timing (retarded) over ideal, you could run water injection to pick up the lost efficiency is one example.