what do you guys think about running primary and secondary injectors? where street-ability is not compromised. rather than 4 massive squirters that can cause puddling, thus rough idle and low rpm bogging.
(example: 320-primary, and two 550-770 secondary)
mazda rotary does this.

 

I personally like the idea. I just dont know how to do it. I suppose you can control 4 additional injectors plumbed into each intake runner and use an MF2 to control them. I believe there is a standlone that is made for such a setup too. Then it's too expensive for an ordinary joe to be feasible.

Unless u make an ungodly amount of power, I feel large injectors with the help of an afc would do just fine.

 

If you are use extra injectors the HKS AIC or Greddy Rebic are the best controllers! The better setups use an extra injector in each runner that is close to the size and location of the primary injector. This is done to make the setup more driveable at low RPM on high hp street cars. Injectors over 1200cc/min do not like to idle below 1200~1500 rpm so a 600cc pri/600cc sec setup solves the bad idle problem and gives the extra fuel needed for boost.

 

check out some archived posts by "nathan's boosted civic". he runs 4 additional injectors using a TurboLink. The car is set up to run liek stock - then when boost hits, the other injectors kick in...

 

I am running a set of secondaries(370cc) on my GSR and 50lbs primaries. planning to boost about 24psi on race gas.

 

I run 2 extra secondary in the intake tube controlled by the mf2. For me its working great. But if you plan on doing it seriously, def put them in the intake runners. Then again, if you plan on doing it seriously, just go w/ standalone.

 

I think Edelbrock has a manifold where you can put in 8 injectors. The Haltech E6K standalone can control it!