How hp will i get from a gt40intake with stock h/c

[deftsound]

I might be winning an auction for a gt40p intake. My question is, with stock heads and cam what kind of gains will i see? I was thinking/hoping for 10-20rwhp...

 

[Black Stampede]

How much did your supercharger cost?

 

[nmcgrawj]

I'd guess for something closer to 10rwhp. The heads still suck.

 

[KamiKaziDK]

Heads don't suck nearly as much as our intake does, you should get around 15hp with a nicer torque and hp curve to the car. If you have the time/money while the intake is off.....pull the heads and get rid of your exhaust bumps and port match everything.

 

[nmcgrawj]

Heads don't suck nearly as much as our intake does, you should get around 15hp with a nicer torque and hp curve to the car. If you have the time/money while the intake is off.....pull the heads and get rid of your exhaust bumps and port match everything.

They still SUCK though.

PHASE 3 -- INDUCTION

GT-40 intake. Tour any car show or drag strip and you'll see Motorsport GT-40 intake everywhere. In addition
to looking great, the GT-40 induction system, which includes upper and lower sections, provides larger diameter
intake runners in conjunction with a larger 65mm throttle body, which should easily compute to better airflow
and more power.

Without making any other changes, the Steeda crew bolted on a GT-40 intake with the adjustable fuel pressure
set at the stock 32 lb. On the first dyno run, Steve said he could feel the additional horsepower in the car, but the
numbers came up shorter than anticipated, a peak of 238.6 for a gain of 6.7 horsepower over our best Phase 2
number. Raising the fuel pressure to 35 and 38 lbs hurt horsepower, so we went back to the stock 32 lb setting.

Computer module. For his own information, Dario Orlando brought out a computer module that Steeda has been
developing. When the module gave us a remarkable increase, up 10.2 horsepower for a 248.8 peak, we decided to
leave it in as part of our test. In fact, subsequent testing of the module in Phase 3 and 4 showed that it worked
better as other modifications were added. Stteda now offers the module under part number STB89.

We also tried a variety of mass air meter and chip combinations. Switching to the Pro-M 77mm meter lost a
couple of horsepower, but adding the Steeda chip with the 77mm meter brought it back up 6.3 horsepower. In the
end, we were not able to better the 75mm mass air and Steeda module combination.

PHASE 3

Peak Hp

Peak Torque

GT-40 intake
238.6@5200
6.7
285.3@3900
-2.1
Steeda module
248.8@5100
10.2
291.6@4000
6.3

5.0 boltons dyno results [Archive] - DFWstangs Forums


This is on a fox with pullies, upgraded exhaust, 1.7rocker arms, and the intake.

It took a tune to get to +10hp for the intake gain. And as they say, the fox's computer will respond better with mods in factory form....

so i wouldnt expect the same results from a 94-95.


Anyway, whats your end goal of the car? Focus on the package and not individual components. If next year you want to get heads...get an intake now that will be able to work at its best then...and not now. Otherwise you'll find yourself selling stuff you just bought to make a good package.

 

[OrangeMustangGt]

I agree, its sure worth it to upgrade the intake. They used the thunderbird intake on our cars to clear the strut tower bar, its worse then even a stock fox body intake.

A gt-40 is a good intake, but if you plan on going farther later with mods, your best bet its an eldebrock, trickflow, or holly

 

[BlackVert]

Heads don't suck nearly as much as our intake does, you should get around 15hp with a nicer torque and hp curve to the car. If you have the time/money while the intake is off.....pull the heads and get rid of your exhaust bumps and port match everything.

+1

The lower intake is the biggest air flow restriction in or engines

 

[94-302-vert]

It does make a difference... How much of a difference I don't know but I know I FELT the difference when I did my 94/95 cobra intake.

 

[final5-0]

Here is what I got against the OEM Cobra intake

As always ... Application is key to what works good for one
guy and not so good for the next

The OEM Cobra is good for a gain
but
Only up to a point

Later if you go with some heads that move serious air .......

You will want a cam that will do the same

The OEM Cobra will then hold back the heads & cam

Now ... Some will point out if you port the OEM Cobra ...
It will hang with the aftermarket intakes

My point is by the time you purchase and port

Might just be easier and less money spent to go aftermarket
in the first place

Then again ... if you found a really good deal on the OEM Cobra
you might could move it out with little money lost

Like was said above ... Look ahead and plan long term

I don't see a 10 to 15 rwhp gain out of line

Grady