COsborne

Well in the past few weeks Ive been buying stuff to make my fuel system more than sufficient for my new engine and stuff. I just won a set of 1600CC injectors on ebay. http://cgi.ebay.com/ebaymotors/ws/eB...873113656&rd=1

I just want to make sure this set up will work for now:

255Lph Walbro Fuel Pump
720CC Primary Injectors
1600CC Secondary Injectors
Gen 2 SAFC

I thought about getting a new fuel pressure regulator but I think this one should be ok for now. I may be wrong though.

maxcooper

Will you be able to tune out enough fuel with the S-AFC? If stock is 4x550 = 2200 cc/min and you are running 4640 cc/min total, you will need to reduce the pulse width by 53%. Also, unless the secondaries are running all the time, that % will change for primary versus primary+secondary running.

People have been trying to run different primary:secondary ratios with the stock ECU on the FD for quite a while without much success. On the FD, the transition is not simply RPM based, so you can't get good drivability with RPM-based fuel adjustments. The only really workable solution is to use a stand-alone ECU like the PowerFC or Haltech, which allows you to run whatever size injectors you want with no size ratio concerns.

I have a web page to help you figure out how much HP your fuel system will support, and/or choose components:
http://www.maxcooper.com/rx7/how-to/...tem/calcs.html

You have enough fuel for 465 RWHP as a conservative estimate. Do you really need that much? Smaller injectors tend to have a better spray pattern, too, so you might want to scale back a bit.

-Max

COsborne

okay. I got a really good deal on them so I'll just resell them I suppose