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

Fox MODS question

  • Thread starter Thread starter knr1313
  • Start date Start date Sep 14, 2019
  • 1
  • 2
Next
1 of 2 Next Last

knr1313

Member
Jun 29, 2016
19
3
13
Sep 14, 2019
#1
  • Sep 14, 2019
  • #1
92 fox gt vert 5spd
can i use 40# inj on a mild cam motor stock upper and lower and heads ? will it run rich? will it hurt?
 
D

Deleted member 215073

Sep 14, 2019
#2
  • Sep 14, 2019
  • #2
Are you planning on getting a MAF to match?
 

knr1313

Member
Jun 29, 2016
19
3
13
Sep 14, 2019
#3
  • Sep 14, 2019
  • #3
JMGlasgow said:
Are you planning on getting a MAF to match?
Click to expand...
will that help?
i do have a A9L & X3Z pcm and a set of 24# inj + AFH70 MAF + BBK TB would that be a better set up ? which pcm should i run with ?
 
D

Deleted member 215073

Sep 14, 2019
#4
  • Sep 14, 2019
  • #4
Either a MAF that is calibrated for your injectors or a custom tune. Otherwise you'll be running rich.
 

knr1313

Member
Jun 29, 2016
19
3
13
Sep 14, 2019
#5
  • Sep 14, 2019
  • #5
?
JMGlasgow said:
Either a MAF that is calibrated for your injectors or a custom tune. Otherwise you'll be running rich.
Click to expand...
thanks for the help JMG
so can i use the 24# inj if i use the f1sf-12b579-aa - AFH70-02 MAF and the A9L ? with out running to rich? or should i find some 19# inj and call it a day
 
D

Deleted member 215073

Sep 14, 2019
#6
  • Sep 14, 2019
  • #6
I'm not familiar with that MAF, what is it out of?
 
Reactions: knr1313

knr1313

Member
Jun 29, 2016
19
3
13
Sep 14, 2019
#7
  • Sep 14, 2019
  • #7
JMGlasgow said:
I'm not familiar with that MAF, what is it out of?
Click to expand...
ppl say 93 cobra
 

Wayne Waldrep

Before I post a pic, do you have one of yours?
20+ Year Stangneter
Apr 14, 2003
1,338
659
143
Cuba, AL
Sep 15, 2019
#8
  • Sep 15, 2019
  • #8
First off, you say you have stock upper and lower intake and stock heads, correct? So just a mild cam? What exactly are you trying to accomplish? Per your list you don't need more fuel.
 

Wayne Waldrep

Before I post a pic, do you have one of yours?
20+ Year Stangneter
Apr 14, 2003
1,338
659
143
Cuba, AL
Sep 15, 2019
#9
  • Sep 15, 2019
  • #9
knr1313 said:
?
thanks for the help JMG
so can i use the 24# inj if i use the f1sf-12b579-aa - AFH70-02 MAF and the A9L ? with out running to rich? or should i find some 19# inj and call it a day
Click to expand...
No.
 

knr1313

Member
Jun 29, 2016
19
3
13
Sep 15, 2019
#10
  • Sep 15, 2019
  • #10
Wayne Waldrep said:
No.
Click to expand...

i hate to be all over the place but i'm trying to see if this will be beneficial to me
right now this is what i have
BBK shorty
NO CATS JUST FLOWMASTERS
mild cam think its a B303
CAI
PULLEYS
NO A/C
NO AIR PUMP

this is what i have as as extra parts
70mm maf with F1SF-12B579-AA AFH-70-02 3C19
BBK 70MM TB
X3Z ecm
FORD (DENSO) 24# F55E-A2E inj
FORD explorer GT40 UPPER AND LOWER INTAKE
 
Reactions: revhead347

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
27,826
10,507
203
polk county florida
Sep 15, 2019
#11
  • Sep 15, 2019
  • #11
If the maf sensor was F1ZF I would say yes but I can't say about a F1SF sensor
everything on your list will be 'ok' but the B cam is a little high strung and may be a dog in the lower rpms, more so with the stock heads. JMO
 

a91what

SendMeUrDataLog
10 Year Member
Apr 6, 2011
10,739
6,720
214
Hillsborough county
Sep 15, 2019
#12
  • Sep 15, 2019
  • #12
The 93 cobra ecu was programmed for 24# injectors, the maf is designed for a larger 70mm housing if I am not mistaken. There is no stock maf designed for use with 24# injectors, you will either need a tune to change the fuel curve in the ECU or an aftermarket maf designed to (lie) to the ecu for the larger injectors.
For your setup just run the 19# injectors and call it a day.
 
Reactions: stanglx2002

stanglx2002

CT Material here
15 Year Member
Jul 7, 2005
1,563
1,110
164
Sep 15, 2019
#13
  • Sep 15, 2019
  • #13
a91what said:
The 93 cobra ecu was programmed for 24# injectors, the maf is designed for a larger 70mm housing if I am not mistaken. There is no stock maf designed for use with 24# injectors, you will either need a tune to change the fuel curve in the ECU or an aftermarket maf designed to (lie) to the ecu for the larger injectors.
For your setup just run the 19# injectors and call it a day.
Click to expand...
I agree with the post above since the 19's you have now will be plenty for the combo you have laid out. You are just better off putting the intake and tb on the car and running it.
 
Reactions: revhead347

Wayne Waldrep

Before I post a pic, do you have one of yours?
20+ Year Stangneter
Apr 14, 2003
1,338
659
143
Cuba, AL
Sep 15, 2019
#14
  • Sep 15, 2019
  • #14
Hmmm...I looked up the MAF part number you gave and for me it came back as a 93 Cobra. So I'll bow out of this conversation. The answer is above anyway.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,156
17,847
224
Massachusetts
Sep 15, 2019
#15
  • Sep 15, 2019
  • #15
Wayne Waldrep said:
Hmmm...I looked up the MAF part number you gave and for me it came back as a 93 Cobra. So I'll bow out of this conversation. The answer is above anyway.
Click to expand...

Dammit. I was incorrect. It is a 93 cobra MAF.



Personally what I’d do is install the explorer intake, put the cobra ECU, 24s and MAF aside.

If the BBK MAF is for 19s I’d try to run it but if not sell it and buy a 94-95 MAF and run that
 

knr1313

Member
Jun 29, 2016
19
3
13
Sep 15, 2019
#16
  • Sep 15, 2019
  • #16
Mustang5L5 said:
Dammit. I was incorrect. It is a 93 cobra MAF.



Personally what I’d do is install the explorer intake, put the cobra ECU, 24s and MAF aside.

If the BBK MAF is for 19s I’d try to run it but if not sell it and buy a 94-95 MAF and run that
Click to expand...
thanks for your reply but why not use the F1SF - ASF70 and why would the 94-95 MAF be better with my add on parts
 

96pushrod

I think they're a little easier to get off
5 Year Member
May 15, 2018
1,530
871
133
Savannah
Sep 15, 2019
#17
  • Sep 15, 2019
  • #17
Mustang5L5 said:
Dammit. I was incorrect. It is a 93 cobra MAF.



Personally what I’d do is install the explorer intake, put the cobra ECU, 24s and MAF aside.

If the BBK MAF is for 19s I’d try to run it but if not sell it and buy a 94-95 MAF and run that
Click to expand...
He could always put cobra maf, computer, and the 24lb injectors in and it’ll run fine.

With just a cam and explorer intake, the 19lb injectors will be fine though.
 
Last edited: Sep 15, 2019

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
27,826
10,507
203
polk county florida
Sep 15, 2019
#18
  • Sep 15, 2019
  • #18
I think you will not notice the difference between the two combinations.
 

Wayne Waldrep

Before I post a pic, do you have one of yours?
20+ Year Stangneter
Apr 14, 2003
1,338
659
143
Cuba, AL
Sep 15, 2019
#19
  • Sep 15, 2019
  • #19
General karthief said:
I think you will not notice the difference between the two combinations.
Click to expand...
Me either!
 

Wayne Waldrep

Before I post a pic, do you have one of yours?
20+ Year Stangneter
Apr 14, 2003
1,338
659
143
Cuba, AL
Sep 15, 2019
#20
  • Sep 15, 2019
  • #20
Mustang5L5 said:
Dammit. I was incorrect. It is a 93 cobra MAF.



Personally what I’d do is install the explorer intake, put the cobra ECU, 24s and MAF aside.

If the BBK MAF is for 19s I’d try to run it but if not sell it and buy a 94-95 MAF and run that
Click to expand...
Whew...I thought my Googler was broken.
 
  • 1
  • 2
Next
1 of 2 Next Last
You must log in or register to reply here.

Similar threads

3
393W Stroker with Boost - Need Spark Plug Recommendations
  • 387lx
  • Apr 29, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
3
Views
231
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Apr 30, 2026
HotFox
Fox Help
  • 93fox85
  • Mar 22, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
5
Views
177
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Mar 23, 2026
Noobz347
1
Clearance
  • 1993mustang50
  • Apr 3, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
3
Views
129
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Apr 4, 2026
2000xp8
9
Engine Donor '00 Mountaineer meet '91 Fox
  • 91firecracker
  • May 11, 2026
  • Fox 5.0 Mustang Tech
  • 2 3
Replies
41
Views
514
Fox 5.0 Mustang Tech May 28, 2026
91firecracker
9
J
Transmission
  • Jraesims
  • Mar 7, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
2
Views
157
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Mar 8, 2026
JD1964
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
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?