why are you using electrical tape? I used the metal "duct tape". did you cover the original opening in the air box?
my engine compartment looks almost just like yours. I have a picture on my work computer of my setup where I was getting about 60 degrees delta. if I can remember, I will post it here on monday.
I just happened to have a roll of black duct tape kicking around here, so I just used that for attacthing it to the air box. The original air hole in the bottom is plugged with an old shop rag. Not sure what you really mean about "Delta".
that is excatly what I mean. sorry, sometimes my terminology can be vague depending on who I am around.
you may want to consider covering the original opening in the airbox with that same duct tape. the metal duct tape works pretty good.
the biggest thing is that the air coming past the radiator is blowing right on the manifold and dissipating the heat you are trying to suck up. you need almost a deflector shield for this. I know I have that pic on my computer somewhere at the house but I know exactly where it is at work. I will post a picture of it tomorrow.
basically you need a heat shield between the air coming through the radiator and the manifold (header, whatever) so you can gather the heat that it is letting off.
Be the change you wish to see in the world
it's monday, here is that picture I promised. I used flexible exhauste pipe and window flasing. it is only two sided. hopefully this makes sense.
notice how similar our engine bays are. it really is the same car.
I'll look at changing my tape, and building a heat sheild with some aluminum. Was a bit dissapointed this morning. It's -11C here today, and my IAT was only 12C when the ECT was 75C. Looks like i'm losing a lot of my heat.