I'm trying to finish up a project or two on my 85 and 87 CRX Si's.

Need to get a set of bigger injectors to run boost on either the 85-87 CRX Si 12V motor or the 16V twin cam from the RS teg.
One I'll be running a pressure dependent FPR for fueling needs under boost, but I also need some injectors good for ~200hp @75-80 % duty cycle to use with an HKS PFC-Con, FPR, etc. (for the other one)

Bigger Honda (prelude) or DSM injectors seem to usually do the trick (I hear).
Which ones fit those early OEM injector clips? Looks like I'd need something atleast 270-310 cc/min since I'll just be running low boost on the stock bottom ends. Since I've got spare injectors (and the car's not presently running either), is there a place I can send MY injectors to get re-sized (RC or Zdyne). ... thanks, ed.

 

w/ the fuel set up you described...you should get ample fuel w/ stock injectors. @ 5-7psi

 

Thanks Antonio, I figured the stock injectors would be OK with the boost dependent FPR, for one of the set-ups, however ...

But what about bigger injectors for use with the HKS PFC-Con?
This unit came with my 1st gen Si (HKS) turbo and manifold, and allows for adjusting "trim" at multiple engine speed points, and is essentially a boost dependent VAFC for that old wiring harness.

So, I was under the impression, that with this electronic controller I'd need a set of bigger injectors since the stock ones are probably close to 90% duty cycle or more already under N/A (like using bigger injectors with a Hondata unit).

1) Which type (peak and hold or saturated) are the original ones in those cars?
2) Which OEM type (Honda-Prelude or turbo DSM) bigger injector can I use?

 

I'm pretty sure that you need saturated injectors...not 100% though...

I was using a VAFC w/ the stock injectors @8.5psi, and was able to make some decent adjustments...310's should work better though.

 

stock work ok for up to 9 lb boost..ud probably need a fuel regulator and fuel pump befor going for a set of injectors..

 

Thanks guys, ... the pump and regulator pretty much goes without saying.

 

you can send them to rc and get them cleaned and blueprinted for like $20 an injector i think. i'd heard of someone who paid $8 per, but don't know where from.