My RX7SP build up

[classicauto]

You're running NRS ceramics in this car still? With or without the experimental corners?

[RICE RACING]

Originally Posted by classicauto

You're running NRS ceramics in this car still? With or without the experimental corners?

^ No and No. ^

The engine is 100% Mazda std 13B-REW. < Stripped, checked, re assembled and put in the car just as it comes out of the box 100% stock standard with zero modifications or parts changed from factory.

^ That is the BEST part about it, ANYONE can go and achieve exactly the same result as no special parts are required nor needed!, you have a fresh healthy non molested factory engine and you will get the same result. I did this MANY years ago with a customer car but based on a T2 Series 5 engine block, back then I put it down to a one off, this times I repeated it and have achieved much more power ......... stock std engines are all you ever need, more power than you can ever handle and durability is unmatched. But the absolute best part is the power band, it shits on anything else.

[project86]

Originally Posted by RICE RACING

^ No and No. ^

The engine is 100% Mazda std 13B-REW. < Stripped, checked, re assembled and put in the car just as it comes out of the box 100% stock standard with zero modifications or parts changed from factory.

So all of your performance gains are from solid tuning? Thats just fantastic. what whp are you putting down?

[RICE RACING]

Originally Posted by project86

So all of your performance gains are from solid tuning? Thats just fantastic. what whp are you putting down?

The honest way I measure the power its around 330~350rwkw. If you measured it on a dyno dynamics (which read much much lower than a dyno jet) then it would be around 400+rwkw, in scum english metric units this is 530+rwhp.....

For all that typing though I dont give a fuck about dyno sheets or their guestimates as they really dont add up to reality in most cases!

All I know is that a stock 276bhp RX7 takes so long and a certain distance to do an acceleration pull (as I posted) and mine if over twice as powerful since takes under half the time and under half the distance, so by my measure its twice as powerful (as I listed in the measured RWKW) in my tests (between a spirit R type A and RICESP) and that is on much lower boost and power to what I run it at now

I estimate the engine power at around a GENUINE 550bhp+ but with more in reserve, which is the amazing part. And yes its down to nothing more than water injection and very fine set up of the whole system, rather than any exotic mega dollar engiens or other snake oil

[project86]

Originally Posted by RICE RACING

in scum english metric units this is 530+rwhp.....

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?

[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.

[project86]

Originally Posted by RICE RACING

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.

So really here you would have to be running a pretty extreme NA set up for this to be pracatical at all? In which case would it even be worth it ?? lol. My future plan is to run a NA 20B (Rx8 rotors/ported/motec/full exhaust).

My main reasons behind the build are at this point because i wanted to be able to have some more "fun" whp numbers but keep the reliability of the NA platform so i didnt have to worry about blowing the damn thing up. And also because the 20B is just a cool build you dont see everyday. Ive seen my friends dump what we thought were good turbo builds, but apparently from all ive seen, from this build and the info you've provided in other threads, my fear of the turbo game is really an unnecessary one .