Is there anyone out there with the stock 550' 850's system? The reason I ask is because it's my understanding that the stock system will handle up to 400 HP. Is this true? I have just converted to single with a small to4b and am only looking for about 325ish rwhp with minimal boost.
Here's my mods just in case your curious:

Full custom 3-inch exhaust w/o cats.

Panspeed tuned ecu for a single.

KOYO Radiator upgrade

Custom FMIC/Greddy elbow

Block off plates all around

 

^ Anyone?

 

I am running stock injectors with upgraded Walbro 255 fuel pump on a stock motor, To4e 57 with .84 a/r p wheel. I do run a 3 inch metal cat which keeps the flow in check a bit to keep the rwhp under 300 @11psi with 11.3-1 a/f ratios. In addition, M2 medium IC, Aquamist stage 1 water injection and PFC.

 

Is there anyone else out there who runs safely on near stock levels?

 

No, the stock injectors max out at about 360, and you lose tuning control at about 330-340.

I wrote a web page that you can play with to see what kind of power different systems would support:
http://maxcooper.com/rx7/how-to/fuel_system/calcs.html

If you want your car to work reliably, be wary of pushing the limits of your fuel system.

-Max

 

Yes! That's what I needed. Great page, thanks alot!
Dan