it wont. the thing is the port size on the HF 8 valve head is FAR too small to accomidate the Si manifold. you will not gain power, you will not pass go, you will not collect $200. i thought of doing this back when i still had my CRX and it still had the HF motor but i realized that the work involved, etc was not worth my effort. not only would you need the IM and ECU, you would want to change the MAP sensor, purge solenoids, exhaust manifold etc etc etc. just get a d16a6, they are plentiful and cheap. hell my friend has one thats frozen that he may be able to sell you so you can rebuild it *COUGH* 14.86:1 endyn pistons *COUGH*9civicsi1 wrote:Has anyone ever tried putting an Si intake and ecu on an HF. The only reason I wanted to give it a try is it has roller rockers and 9.6:1 compression. So I figured that if I put an Si intake and factory Si Exhaust it should run half decent. Keep in mind this is a daily driver so even though a swap would be super easy I don't want to put that much time or effort into it.
