Gt40 Tubular Intake - Mustang Evolution

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Old 04-11-2015, 07:21 PM   #1
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Gt40 Tubular Intake

I finally purchased a gt40 tubular upper and lower, the lower is from a Lightning, meaning its a 351. I need a 302 lower to bolt on. I found a 97 Mercury Mountaineer v8 (built 4/97) lower intake manifold, is that a good buy or should i continue to look for an explorers? Heres my intake, and what alse should i change on it to make a perfect fit. I own a late 90 MAF AOD 5.0.

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Old 04-12-2015, 07:09 AM   #2
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Mountaineers and Explorers have the same intake.The 96-early 97 is the Cobra style GT40 intake.The late 97-2001 is the GT40P intake.The GT40 has egr and the GT40P doesn't.If the Mountaineer intake you're looking at doesn't have a threaded hole on the driver side near the #5 intake runner(for the AIT/act sensor) and there isn't a hole in the center of the intake for egr flow, its a late 97 intake(GT40P)instead of an early 97(GT40)If you wanna retain the egr system, get the GT40 intake but if you don't plan on running egr you can use either intake.The GT40P lower would have to be drilled and tapped at the #5 runner so you can install the AIT/act sensor.A larger throttle body is a good addition.Go 65-70mm if you've got a stock to mildly modified Mustang. A larger MAF sensor will also help add more HP.If you wanna go cheap,get a 70mm from any 94-95 Mustang (3.8 and 5.0 models both have the sensor)If you wanna buy aftermarket, the ProM 76 or 80mm is the perfect choice.
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91 LX 342ci(10.5:1)
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TFS track heat
XE276HR .544" .544"
Flowtech 1 3/4"
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Old 04-12-2015, 07:58 PM   #3
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Cool, ill be heading back and pulling it out. The upper looks in almost new condition, i hope its the same for the lower. Thank you so much for taking the time on the feedback. Yeah i want to retain the egr system. Im piecing it together to do everything at once.

I still need a e303 cam, and want to run an electric dual fan. Im tired of the engine bay getting dusty because the stock fan kicks up the dust.
For injectors i should keep the OEM ones correct?

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Old 04-13-2015, 10:31 AM   #4
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You can install the ACT sensor in the inlet tube if you need to, no need for it to be in the #5 runner. Easiest way to tell is to just look for the EGR hole in the middle of the intake runners. If it is there it is a GT40 and it'll have the bung for the sensor, if it doesn't its a GT40P style and you put the sensor in the intake tube. Or just put it in the intake tube regardless.


Just mentioned in another thread, any GT40 intake (for a 302 obviously) will be identical power wise so condition is more important than anything.


If you are getting the heads done or if they are already done and they are better than GT40s, you can also send the lower out to get ported since the upper already flows 250 cfm stock. Stock, the lower flows 200 but can be taken out to 250.
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Old 04-13-2015, 10:44 AM   #5
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Yeah for now I would stick with the 19lb injectors.The 1st link below shows which lb injector is needed depending on hp level.The 19lb injectors that come in the Explorers and Mountaineers are better than the ones in our Foxbodys because the bottom of the injector has 4 holes instead of one.It supposedly produces a better spray pattern,so if you can pick those up for a really really cheap price while you're getting the intake it would be good.The 2nd link shows the different type of injectors.The 3rd link shows a picture of the bottom of the injector and its 4 holes.Once you open that link scroll the picture to the right so you can see the next injector picture,which shows the bottom side of the injector with the 4 holes.The only word of caution though,when injectors sit around for years without being run in a vehicle they can get gummed up and stop working.You can clean them easily enough and test them before buying if you read the 4th link below.
(1st link)
http://web.archive.org/web/201312291...tion.com/?p=38
(2nd link)
http://www.veryuseful.com/mustang/te...ctor_Guide.jpg
(3rd link)
http://m.autozone.com/autozone-mobil...x4ffc?id=80122
(4th link)
http://web.archive.org/web/201312291...tion.com/?p=82
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91 LX 342ci(10.5:1)
TFS 190cc(stage ll)
TFS track heat
XE276HR .544" .544"
Flowtech 1 3/4"
Prochamber w FM
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Old 04-13-2015, 01:25 PM   #6
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He can also just grab a pink set out of an 02-04 car. They work without a tune just like they worked in the 02-04 cars which Ford never updated for the 21s lol.
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Old 04-13-2015, 04:28 PM   #7
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Here is a good read for you......
The Ultimate GT40, Cobra and Explorer Intake Manifold FAQ - FiveOhInfo.com


For electric fan you can use a contour dual fan, or a taurus V6 fan or a SN mustang fan or even a Mark VIII fan which is a real air mover.
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1989 Sonic Blue LX Coupe, 349 ci, TW heads, TFS Track Heat Intake, 75mm Accufab TB, 80mm ProM, 30 lb. inj, TKO, 3.73, 31 spline w/ TruTrac, MAC 1-5/8" LT headers w/ H pipe, Flowmaster, electric fan Moates QH
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Old 04-13-2015, 08:10 PM   #8
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Some or all of you guys might have already seen the following thread,but just in case you haven't, I'm gonna post it.Since were listing parts that can be used on our Foxbodys from other models,this is the ultimate Junkyard HP thread in my opinion. Sorry if everyone has seen it already.
http://forums.corral.net/forums/5-0-...r-summary.html
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91 LX 342ci(10.5:1)
TFS 190cc(stage ll)
TFS track heat
XE276HR .544" .544"
Flowtech 1 3/4"
Prochamber w FM
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Old 04-14-2015, 12:25 PM   #9
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Good stuff there. I guess there isn't enough traffic on this forum but certain items that get repeated here should be put onto a sticky and left there for all to enjoy.
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2016 VW GTI 2.0 Turbo

1989 Sonic Blue LX Coupe, 349 ci, TW heads, TFS Track Heat Intake, 75mm Accufab TB, 80mm ProM, 30 lb. inj, TKO, 3.73, 31 spline w/ TruTrac, MAC 1-5/8" LT headers w/ H pipe, Flowmaster, electric fan Moates QH
391 rwhp & 424 rwtq...Mustang Dyno 11.5@122mph
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Old 04-15-2015, 09:49 AM   #10
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Agreed
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91 LX 342ci(10.5:1)
TFS 190cc(stage ll)
TFS track heat
XE276HR .544" .544"
Flowtech 1 3/4"
Prochamber w FM
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Old 09-22-2015, 06:13 AM   #11
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Bringing this one back, can't believe its been 5 months and still no progress due to work. Found the lower and defenetly looking to having it ported. But i still feel like theres 100s of articles on this but not a step by step install. Once im done im defenetly doing one.
Anyways the lower i have has the water return pipe, on both intakes i have is movable, shouldn't it be tight? Again this is my first install and have little knowledge on hoses, vacuum lines and fuel rails. I will mark and leave notes on every hose i remove to guide me in putting it back but like i said, no right or wrong on how to go by installing these gt40 intakes. I apologize for being a rookie at this but any other info works. Heres the two lowers i have



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Old 09-22-2015, 12:36 PM   #12
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Since it is a Mustang intake and not an exploder, it should be a direct swap. Make note of everything you remove if its your first time and just hook it all back up.


However, if you still have stock heads, porting is a waste of your money, you will see zero results. This is because the stock lower flows 200cfm which is more than the stock E7 Mustang heads can use. I'd leave it until you do the heads and then send the lower out to Tom Moss for porting. The upper flows 250cfm which is as much as the lower can safely be ported to so leave the upper alone regardless.
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