throttle body, intake manifold and megasquirt arrived today!!

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^^ Can you tell me that setup and where to buy those parts? I'm very interested in setting up an ITB setup but i want to stick with FI not carbeurators.

Still, we're talking similar efficiency numbers, or at least it sounds similar to my ear.

The person I know had to shut the car off on the dyno since the NA injectors' duty cycles were getting to high at 197 whp.

If they maxed 4 460 cc/min injectors out on the dyno, and made only 197 whp, they either had the parking brake set or were running way too rich to make peak power.

The numbers will not be that close, I really doubt that a 25% thermal efficiency can be achieved with a stock turbo and safe tune on a turbocharged rotary.

I have seen 30% (calculated) on an NA rotary.

The megasquirt can come from a variety of sources.

The manifold can come from a few places as well. Same manifold for a Weber.

The ITBs i got used, but new TWM, Tweakit and a few other places have them.

AFR was at 12.8 : 1, which is slightly richer than where I would've have put it.

Where they running peak and hold on the injectors?
What was the fuel pressure?
What was the injector duty cycle?
What timing advance and split were they running?
Did they have a bridgeport or peripheral port and scavenge a lot of air/fuel charge without burning it? (Making the Air/fuel ratio appear leaner than it really was and wasting fuel.)
I can't think of any other reasons that the injectors would be maxed out at that low of a horsepower number.

Even the online calculators (which assume a higher BSFC than a well tuned rotary has) say that 460 cc.min injectors should make 250 WHp.

Streetport, that's all i know.

I am hoping to at least get the car running before i leave for basic. When i get back i plan on building another engine for it. But i should be able to see what kind of power i can get out of a stock port engine.

Peejay just made 170 with his streetport setup on a megasquirt via Dynopaks

Well the 13B starts. Going to attempt some rought tuning but i leave in 6 days for basic so i wont be back to touch it again til September.

What ITB is that?

efi hardware Pro Race with the tapered air horns.

(be non sized down version of that pic makes a great desktop pic)


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Can RX-8's play? LOL

When I was NA I made 202-rwhp and 132 tq on a stock keg (no porting) and running the factory EMS (no tune). I had the stock intake and cat in place.

For all the crap the Renesis gets sometimes in NA form it's actually not too shabby :)

no question that their power is comparatively impressive, but i must say that i've been a bit disappointed with reliability - not of the motor, but the whole car.