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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 02-21-2014, 09:16 PM   #1
94SN95
 
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Vehicle: 1994 Ford Mustang Gt
Location: Maine
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Default Need advice on Gt40 set up?

Hey guys. Just picked up a set of GT40's with the upper/lower intake. Just wondering what's the best way to get the Gt40's to work with my e303 cam? I think double springs are going to have to happen, so I don't float any valves. Also what should I run for throttle body and mass air? I think I'm sticking with 19lb injectors for the time being and stock rockers until I can afford them. Is there a valve spring I can buy that will work with the Gt40's and the e cam? Just trying to get this semi build going. My fiancé's dad owns a machine shop, so I the heads will definitely be worked on before going in. Check out the new dished 03/04 Cobras! I love them!
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1994 Gt: Pulleys, 4:10's, Ford Racing clutch and flywheel. Mainly just serviced and got the car back to where it needs to be. Just picked up Gt40's, upper and lower Gt40 intake, lifters and E303 cam, soon to be installed

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Old 03-03-2014, 03:29 PM   #2
02WhiteGTVert
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Quote:
Originally Posted by 94SN95 View Post
Hey guys. Just picked up a set of GT40's with the upper/lower intake. Just wondering what's the best way to get the Gt40's to work with my e303 cam? I think double springs are going to have to happen, so I don't float any valves. Also what should I run for throttle body and mass air? I think I'm sticking with 19lb injectors for the time being and stock rockers until I can afford them. Is there a valve spring I can buy that will work with the Gt40's and the e cam? Just trying to get this semi build going. My fiancé's dad owns a machine shop, so I the heads will definitely be worked on before going in. Check out the new dished 03/04 Cobras! I love them!
You should be able to run the GT40's fine with the E-Cam and 1.6RR's. Don't change your injectors until you get a calibrated mass air. 19lbs should be fine for your setup, no more than 24lbs if you're just doing a GT40 setup. the GT40 intake flows great too. With Ford springs you shouldn't be worried about floating any valves under 5,500RPM.
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-1994 5.0L Mustang SVT Cobra #1,440 of #5,009 Built 5/16/1994 ***SOLD***


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Old 03-03-2014, 10:00 PM   #3
sealevel
 
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Vehicle: 90 Mustang GT
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Not trying to thread jack but I have a question I don't feel is thread worthy but is pretty close to the nature of this thread. What is the max lift cam you can run on rebuilt stock spec GT40 heads?

And of course a bump for you!
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Old 03-03-2014, 10:00 PM
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