1988RedT2

I need more speed, and the budget won't allow for a Haltech, so I'm leaning toward going with the Apexi S-AFC and swapping 1600's in on my secondary injectors. Does anyone have any firsthand experience with this setup?

j9fd3s

i think the safc only does +/-50% and the 1600's are too big, but i could be wrong.



the other option is to get your 550's bored out to 1100, that would work, or get 850's bosches instead of 1600's

1988RedT2

No, you are quite correct, +/- 50%.



Honestly, I didn't know injectors could be modified to deliver more than their rated delivery.



I know there's a difference in injector impedance for pre-88 injectors versus later injectors. My car was mfd. in 1988. What impedance injectors do I need?



Is it possible to tune this setup with just a few dyno pulls?

j9fd3s

rx modifies them, or theres plenty of bosch ones besides the 1600s



88 is high, 12-15ohms, you may need resistors. its not really a big deal



yes you should plan on like 3-4 pulls. you need one pull to see where you are, and then make corrections from there.



i always get confused on the dyno (its hot, loud, stinky etc etc) so next time i'm going to actually write down a schedule or if/then statements.



1. run #1 baseline, if it pings retard timing, if too rich lean it out 3% and so on.