Ford Racing GT-40 Intake Manifold


andrewespo
08-15-2004, 11:43 AM
Im thinking in investing into the GT-40 intake manifold. But before I do Im wondering if this mod calls for a mass air conversion, or I can still milk the speed density? (88 GT)

http://static.summitracing.com/global/images/prod/norm/fms-m6001a50_m.jpg

90Stangjc
08-15-2004, 01:46 PM
I believe unless you change your heads/cam that u shouldnt have to convert to mass air. I think speed density can handle minor mods and even the intake manifold. Maybe you should do mass air anyways, be great in the long run.

andrewespo
08-15-2004, 01:59 PM
I was going to convert, buts its like $550. The GT-40 intake manifold is $600. I have $600 to spend its basically a toss up.
GT-40 intake manifold = Horsepower
Mass air conversion = Allows me to make the major upgrades down the road.
What would you go with? Mass air still?

StangNut86
08-15-2004, 03:26 PM
first off, you can find a gt-40 manifold and often a cobra intake to go along with it for much less than that on ebay. i'd upgrade to mass air first anyway.... it'll prepare you for your other mods.

GTStang
08-15-2004, 04:24 PM
I would not get a GT-40 intake unless I got an awesome deal. There are many intake manifolds that are far superior for equal or less money.

wildstringer
08-15-2004, 08:11 PM
I also have speed density on my mustang. I have been told hat with speed density the computer will adjust air and fuel back to factory specs . so if you add more with a better intake the computer will null out the changes. now with MAF the computer will recalibrate after all changes. just disco the battery and it will allow the computer to acccept add ons. not to mention i ve been told idle quality is better with MAF

andrewespo
08-15-2004, 09:01 PM
Can I find a cheaper mass air conversion kit. The one on summit is expensive.

andrewespo
08-15-2004, 09:06 PM
I would not get a GT-40 intake unless I got an awesome deal. There are many intake manifolds that are far superior for equal or less money.

Which ones are superior for less or equal price specifically?

91notchback
08-15-2004, 10:47 PM
Which ones are superior for less or equal price specifically?
the trick flow track heat manifold $425 @ crmotorsports.com
and i would go for MAS first too.

andrewespo
08-15-2004, 11:31 PM
Is summit the only place to pick up the Mass air conversion?

stang_racer20
08-16-2004, 01:36 AM
Yeah Trick Flow is nice one. I have the track heat and am thus far pleased. MAF conversions are carried by many companies, summit usually has the best deals on parts though. Most of my entire car is summit bought.

GTStang
08-16-2004, 09:02 AM
I also have speed density on my mustang. I have been told hat with speed density the computer will adjust air and fuel back to factory specs . so if you add more with a better intake the computer will null out the changes. now with MAF the computer will recalibrate after all changes. just disco the battery and it will allow the computer to acccept add ons. not to mention i ve been told idle quality is better with MAF

No this is not how SD works. SD will adjust to changes by performance parts. Here are the 2 problems with SD: 1. It can only change within stock pre-map variatons. 2. It can not handle mods which would cause large lamda in manifold pressure.


As far as better/superior intake manifolds. Hell the Cobra intake manifold has been tested and only flows 1 cfm less than the GT-40 and can be purchased for half the price. I don't even like the Cobra but it just goes to show how overpriced the GT-40 is.

andrewespo
08-16-2004, 02:46 PM
What about the trick flow EFI Street intake manifold? The track heat one would need a cam too go along with it right? Also the idle is 1500 -6500 rpm on the track heat what does that mean.(idle is no lower than 1500 and no higher then 6500?

SVTcobra306
08-16-2004, 10:14 PM
Get the explorer intake, same as Cobra/GT-40, just doesn't look quite as cool. Never over 300 bucks, though.

BTW GT-40 and Cobra intakes are internally the same...

wildstringer
08-16-2004, 11:37 PM
Can I find a cheaper mass air conversion kit. The one on summit is expensive.

if you can find a junkyard mustang you could salvage the needed parts from it . but i ve read the process for conversion and its a little tricky so you will want directions . i was gonna get mine from summit too. there was this one place that had one for 626.00 but that came with 24# injectors and of course the meter was calibrated for them .The place is called excessive motor sports ExcessiveMotorsports.com or 1-800-930-9585

wildstringer
08-16-2004, 11:39 PM
What about the trick flow EFI Street intake manifold? The track heat one would need a cam too go along with it right? Also the idle is 1500 -6500 rpm on the track heat what does that mean.(idle is no lower than 1500 and no higher then 6500?

Thats the one im going with 395.00 thru summit

SN95GT50
08-20-2004, 08:57 AM
Ok, I'll throw my opinions in...

The GT-40 and Cobra intakes are not the same internally externally or in any other way. The Cobra intake is cast, the GT-40 intake is tubular. The flow numbers are pretty simular between the 2 intakes but the upper on the Cobra can be ported the GT-40 upper cannot.

Putting the GT-40 intake on should not hamper your speed density, it just flows better, that is it.

The GT-40 intake beats every other intake in one important way, it just looks bad a$$, ok that may be an opinion.

As far as purchasing a GT-40 look around, they are easy to find, try the classifieds on corral.net, stangnet.com, eBay, etc. I picked up my GT-40 intake for $200, but, that was a lucky find.

SN95GT50

steve453
11-19-2012, 10:21 AM
Is the 92' Mustang GT40 intake a better option than a stock 93' Ford F-150 intake. I'm swapping this Mustang motor into my 4X4 and the Mustang motoe has an E303 cam in it.
Thanks!

steve453
11-19-2012, 10:25 AM
I see I would have to change the EGR or switch vale covers. Also I don't have a TB for the GT40 intake but do have the dual port TB for the truck intake.
Thanks,

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