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#1 |
Registered Member
Join Date: May 2005
Posts: 16
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![]() I recently picked up a GT-40 upper and lower manifold second hand, but I am puzzled. All that I have is the upper and lower intake plus a vacuum tree.
When I am looking at the underside of the upper intake, there are 4 threaded holes, two on the middle underside of the tubular section. It's obivious that the vacuum tree goes there on one side, but what goes on the other? Do I plus the other one? On the upper section, one of the holes has a threaded plug in place, and the other is open. Do I plug the open one too? Does anyone have any install experience with this intake? Any help is appreciated. |
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#2 |
Registered Member
Join Date: Apr 2001
Location: Staging lane
Posts: 4,337
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![]() Very simple there isnt exactly set rules on how to route your vacuum lines. Just plug the holes you dont use.
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92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer |
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#3 |
Rat Killer
Join Date: Aug 2002
Location: Cold ass Ohio
Posts: 1,143
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![]() Doesn't the MAP sensor go in one of those?
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d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply..... ![]() |
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#4 |
Registered Member
Join Date: Apr 2001
Location: Staging lane
Posts: 4,337
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![]() I posted a how to article with pics a couple of years ago here in windsor power.
Do a search and you might find it.
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92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer |
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#5 |
Rat Killer
Join Date: Aug 2002
Location: Cold ass Ohio
Posts: 1,143
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![]() No, seriously! I'm a "carb" guy, and trying to learn about this new fangled (20 years now! LOL) fuel injection. Is the MAP sensor supposed to go in there, or is that a Speed Density thing?
Just curious!!
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d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply..... ![]() |
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#6 |
Registered Member
Join Date: Aug 2002
Location: SanAntonio, Tx
Posts: 957
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![]() I only know of the act sensor in the lower, your swap should be pretty straight forward.
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X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear |
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#7 |
Mizzou Tigers
Join Date: Apr 1999
Location: weston, MO United States
Posts: 1,455
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![]() It's been years now since I installed my GT-40 intake, and although I can't remember all the details, I do remember plugging one of the ports there.
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2006 Mustang GT 1990 LX GT-40 motor 262 horsepower, 307ft-lbs (sold but forever loved) 1998 Contour SVT Rice Haters Club Member #244 |
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#8 |
Rearview Mirror Haze
Join Date: May 1999
Location: Huntsville, Alabama...a.k.a. "HuntsVegas"
Posts: 387
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![]() You can tap the upper to put the AIT sensor there but it's easier to just use the air inlet tube. As for the vacuum lines, just like was said before. Reroute them anyway you please but you may end up having to install an Adjustable FPR and a Fuel Pressure guage. If you get more or less vacuum than stock to the FPR it will up or lower your pressure... take it from experience just go ahead and do it- good luck~
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93 lx Notch 01 GT ![]() ...the epitome of Murphy's Law |
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#9 |
Registered Member
Join Date: Feb 2002
Location: Jacksonville, FL
Posts: 706
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![]() The big vacuum port on the rear goes to the brake booster
one goes to the pcv (i also use a small filter b/c it will suck oil) and one goes to my AFPR. One is plugged. If you have a BAP sensor (I don't know what year you have) leave it open to the atmosphere. Let me know if you need a pic... cheers
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1988 GT Convertible 331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta... One week with new motor, two speeding tickets...joy |
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