hello, i drive a stock '91 hf, in a few weeks i'll be getting a 16valve d15 from a '95 dx hatch mated to a '88 si tranny as my first setup for free. now i plan on using some bigger intake manifold from another d, maybe an a6 or y8 i dunno along with an Si ecu. now heres the question, could i put the manifold and si ecu on my hf motor using my hf harness, i believe it will bolt up but i've heard there will be some extra plugs on my hf harness, anybody have any experience with this.

eric

 

IF you get a manifold from the a6 it is a straight swap, you have to swap plugs to get a y8 to fit, the pm6 or si computer will make your hf motor run way to rich, and prob. hurt the performance instead of improving,

I would just wait to swap the manifold and ecu when you do the motor