550cc primaries and 1300 secondaries. I dont want much more than 350hp to the wheels and i think this is reasonable for my goals. I also dont really want to have to get a new secondary rail. What do ya think?



thanks guys

 

There is a fuel injector calculator on Ari's website..



http://www.rx7.com/calculators.html

 

There's also a nice one on Max's site......



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

 

I recommend 850cc, just in case you ever wanna make a little more power.

 

cool its saying that i can do 376whp at 75% duty cycle at 50psi of fuel pressure and 401 at 80% duty cycle. That fuel pressure and duty cycle are within safe parameters so looks like im keeping my stock secondary rail! Please chime in if you think this would not be safe.

 

that should be safe....your not going to be running WOT all the time so that set-up should be cool..

 

just buy the 1300s new and swap the 850 secondaries to the primaries spot and then run the 1300s in the secondary spot. that setup will be good for pretty much whatever you want to run in that HP range

 

i had over 320whp with just the stock primarys and 1300 secs injector duty was decent range. i dont remember the specific numbers but i think ud be fine with that setup



whats the stock fuel pump rated for though? ive since upgraded mine but i dont remember the numbers

 

stock fuel pump doesn't flow enoguh to support the 1300s properly, should upgrade that as well if your doing the 1300s

 

Where can you get 1300s from?