I tried searching but maybe I wasn’t using the right terms... Anyway, I recently picked up an Aspec GT-35r kit. My question is should I go with the 4 850CC injectors I was going to use with the twins before I bought this kit or should I go with 850 primaries and 1600 secondary’s? I will be running a PFC. I am guessing the more fuel the better but I don’t want the car to be to difficult to tune.

 

You forgot the most important part...what are your HP goals?

http://www.injector-rehab.com/misc/3gencalc.htm

I'd say you could probably do with more fuel.

 

http://www.maxcooper.com/rx7/how-to/...tem/calcs.html

 

1680/850 will work fine and provide plenty of fuel.

 

850x4 is not going to cut it. Get the 1680/850 for sure.

 

MY hp goals are in the 350-400 range. Well for now anyway. The 1680's should be waiting for me when I get home. Anyone with a similar setup have a base tune I could start with?

 

Now I am debating doing with 1300 secondary injectors in the stock rail.

 

No reason to go smaller on the secondaries. As long as you have a good tune, the 1680's will be perfect and not be maxing out duty cycle. I am going to be running 4 x 1000's in the secondary rail and 2x550's in the primary. I want to be able to keep my idle as close to stock as I can.