• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

GT40 intake & Performer head combo-lets see them

  • Thread starter Thread starter MadDAWG
  • Start date Start date Nov 26, 2006

MadDAWG

New Member
Aug 19, 2002
25
0
0
Michigan
Nov 26, 2006
#1
  • Nov 26, 2006
  • #1
I have purchased a set of 1.9/1.6 valve performer heads. The heads have been ported out to a 1262 gasket on the intake side. This is was supposedly done by a well known shop, but it can't be backed up. My lower intake has also been ported to a 1262 after having the runner legs welded up for reshaping. The car is a 5 speed (2.95 1st - 0.59 5th) 1990 GT. Other goodies include 70mm throttle body and 3,73 gears.

I'm up in the air on cam and exhuast at this point. I'm currently running a e303 with the same intake and ported E7s (190 cfm @ 0.500 lift). I'd like to get some more low end torque becuase of te 0.59 overdrive. I also currently have 1-5/8 FMS shorty headers, but may change of to some 1-5/8 Flow-tech longtubes for which I all ready have the mid pipe for.

I'm curious to see what some other people are running for parts and for ETs and drivability. I'm hoping to run low 12s in the quater and still have a good driver.

Thanks
 

DMAN302

My mom says thanks for the pearl necklace.
Nov 8, 2003
2,120
2
59
windsor, Canada
Nov 26, 2006
#2
  • Nov 26, 2006
  • #2
I run the same head..but should note the weak link for the RPM heads is infact the exhaust side, not the intake. I would look at having the exhaust side done before the install. Along with the Eddy heads I run a XE series comp cam and typhoon intake along with every bolt on avalialble...numbers are in the sig. Good luck with what ever you end up doing.
 

Jim Wyche

New Member
Aug 22, 2000
27
0
0
Collegedale, TN USA
Nov 26, 2006
#3
  • Nov 26, 2006
  • #3
Edelbrock/GT-40

MD,
My set up is similar to yours. I have the GT-40 intake, E303 cam, Edelbrock Performer heads, long-tubes (please look at the list on my site or in My Garage). It runs 7.6 with a 150 shot or 8.3 N/A in a 302 block. The driveability is fine for an old guy except in bumper to bumper traffic in the summer with the air on. That may have something to do with 14 year-old sensors!

Do you know of anyone using this head and intake on a 347?
Good luck,
Jim
 

MadDAWG

New Member
Aug 19, 2002
25
0
0
Michigan
Nov 26, 2006
#4
  • Nov 26, 2006
  • #4
Exhaust side is just as heavily ported as intake. I just didn't know what the gasket number is right now. The guy claimed to have $1200 in the port work alone.

Dman which XE cam are you running? I have an XE274HR but I'm not sure I want to use it for two reasons. The first being I had a TFS stage2 and didn't like it, and second I have 1.7 rockers so the lift gets up there.

Those are the reasons I want to ditch the e303. lol

When ported these can be good (not great) pieces for a 347. On the other hand box stock leaves the performance less than stellar. I should know since I did it. As the saying goes 302 parts = 302 power.

Just an FYI for you Jim if you have not done so all ready I'd highly recomend advancing the e303 cam 4 degrees. It made a world of differance on my car. Just not enough with the .59 OD and 3.73 gears.
 

DMAN302

My mom says thanks for the pearl necklace.
Nov 8, 2003
2,120
2
59
windsor, Canada
Nov 26, 2006
#5
  • Nov 26, 2006
  • #5
I run the XE270HR-12 but step down to the 1.6 rocker over the 1.7 which I believe will be easier on the valve train due to the aggressive ramp rate of the XE cams..results were excellent IMO.
 
You must log in or register to reply here.

Similar threads

6
Hey all,I’m putting together a 302 for my 1968 Mustang and wanted to post the combo + some questions to make sure I’m not missing crucial
  • 68_Disgustang
  • Feb 22, 2026
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
4
Views
717
1965 - 1973 Classic Mustangs -General/Talk- Saturday at 9:06 AM
gray owl
G
A
Discussion on mild budget build/ top end
  • Acesario
  • Feb 21, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
20
Views
663
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Feb 23, 2026
General karthief
351w turbo build.... Turbo guys teach me things...
  • Kid wita 5oh
  • Oct 22, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
13
Views
1K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Oct 23, 2025
General karthief
Forced Induction Bypass valve backwards?
  • Dontknowchit
  • Jun 25, 2025
  • Fox 5.0 Mustang Tech
Replies
3
Views
316
Fox 5.0 Mustang Tech Jun 29, 2025
JD1964
3
Eight inches is enough for me...
  • 351MooseStang
  • Nov 27, 2025
  • 1974 - 1978 Mustang II Talk & Tech
Replies
5
Views
525
1974 - 1978 Mustang II Talk & Tech Mar 2, 2026
Bullitt347
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?