Hey,
Are the SI and HF Injectors the same size? I have an HF manifold and want to use it for my MPFI swap on my 91 DX. Is this possible or would I be better off using the SI parts?

Thanks in advance.

 

They are the same.

 

thats what i thought....

i am curious why they have different part numbers on http://www.hondaautomotiveparts.com. they look visually the same, theres no way that i know of to tell them apart. so i still assume they are the same...just always different part numbers for some reason.

 

My research says the injectors are the same, but you might want to re-think your decision on the HF manifold. The runners are tiny and the throttlebody is small. It was designed for economy. IE keeping the intake velocity up with small volume. I don't know your goals, but if it is performance, as in more hp, I'd stick with the Si.
HTH
chris

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Canonm7 &raquo;</TD></TR><TR><TD CLASS="quote">Hey,
Are the SI and HF Injectors the same size? I have an HF manifold and want to use it for my MPFI swap on my 91 DX. Is this possible or would I be better off using the SI parts?

Thanks in advance.</TD></TR></TABLE>

I know that the intake mani off of the si has fatter runners. If it were me I would use the si parts.......

 

yeah when i had the hf motor in there the intake manifold was very small it didnt look very high flowing at all....i would deff. stick with the SI parts...

 

Thanks everyone.