upper intake question! {HO swap}

[merkman86]

so what differences will there be when im installing a mustang upper intake compared to stock? what will i have to do? help me out!

[Lincolnmania]

first secure a ho upper intake, a 60mm throttle body and a spare lopo egr spacer
take the lopo egr spacer to a machine shop, have them bore it out to 63mm
while you are waiting for the spacer, go get some gaskets, you need an upper plenum gasket (lopo and ho are the same) egr and iac gaskets (might be able to reuse the iac gasket....these are also the same as the ho stuff
need a throttle body gasket and a egr spacer to upper plenum gasket for a 87-93 mustang or 88-92 mark7 lsc 5.0

ok got all your goodies, time to pull the lopo upper
make sure to remember where the vac lines and wiring goes
when you get the lower off, put it upsidown next to the ho upper......you need to swap over the vac tree from the lopo, and move some fittings around , use a little pipe dope or teflon tape on the fittings so it dont leak vacuum......also a great time to replace the pcv valve screen and gromnet while the upper is off.....i consider this a must
once you get all the vac stuff swapped over, you need to make clearance so the ho upper clears the fuel rail, this can be done two ways......either get a 1/2" intake spacer, which is supposed to increase torque, or take a grinder and make a small notch in the upper intake so the lopo fuel rail clears the ho upper.
before you are ready to bolt up the 60mm throttle body, you need to swap the levers between your lopo throttle body and the ho throttle body, this can be done by grinding the pressed shapt piece flat with the levers, and wiggling the levers off and swapping them, when you get the lopo lever on the ho throttle body have a tach weld done so it wont come apart or drill and tap a small hole in the shaft and use a screw and a washer
bolt it all together, bypass the egr cooler hoses, you dont want coolant flowing thru the bored egr spacer, it may leak, noth worth the risk

[88grandmarq]

shouldnt have to clearance anything on the upper intake. All 3 that I have installed went on with no problem, no grinding, no spacers.

[merkman86]

alright sweet guys thanks alot! but what do u mean by bypassing the egr cooler hoses?

[gadget73]

One of the hoses comes off the metal pipe on the passenger side. Just take that hose and connect it directly to the fitting on the lower intake. I'd use new hose for that, its just 1/4" fuel hose.

[merkman86]

okay and r u sure this conversion will work, i heard u need the mass air box or something electrical, some air sensor unit or something from a stang?????

[mrltd]

No mass air box or anything. The stock vic/marq airbox wix connect to the HO throttle body just fine.

[gadget73]

Thats for doing a mass air conversion. Don't need that, and its actually not compatible with your car unless you find some rare parts from a 1991 California CV. Like he said, just hook the stock air box right to the new upper intake, or you can use an aftermarket cold air intake if you're so inclined.

[merkman86]

nope, ill keep it how it is, no cold air, just a question.

[merkman86]

but i have seen some upper intakes on ebay with these four rods sticking out, but most of them dont have them, does it matter which i get, i dont even know what those 4 rods are, im guessing they connect to the air tube or somethin?

[Mr. Land Yacht]

if they're the 4 rods I'm thinking of, then they are the studs that the EGR plate and throttle body slip into.
other than that, I can't think of anything else.
you're talking about the 4 studs sticking out the side of the intake? or something else?

[mrltd]

but i have seen some upper intakes on ebay with these four rods sticking out, but most of them dont have them, does it matter which i get, i dont even know what those 4 rods are, im guessing they connect to the air tube or somethin?

Yes, those are called "studs" as Mr. Land Yacht stated. It does not matter if the intake you get has them or not because you have 4 on your car right now. A pair of vice grips or pliers is all that is needed to remove/install them.

[merkman86]

alright, thanks alot fellas!