Their part numbers are different, but that's for the sets, so I dont know if one of the seals are different or something. Basically can I use HF injectors on an Si motor?

 

i believe all stock honda injectors are the same exept if the OBD is diff

 

They ARE different. 88-89 are ~190 cc while 90-91 HF and all others are 240cc (or greater for other model Hondas)

I owned 89 CRX HF injectors (original from my car) and they couldn't handle the JDM D15B VTEC and P28.. (bogged down lean; Felt like I was out of gas). I put in the OBD1 Injectors from the D15B motor and removed the injector resistor box and all was fine... After a year I went back to the old Peak and Hold (OBD0) injectors... bogged down... purchased used Si injectors and it ran fine. Went and had the old HF injectors tested and they were around 190cc

 

it's an 88 HF so it looks like I'll be finding some new injectors, thanks for the help!

 

i got a set of injectors. 240cc

 

already found some, but thank you