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

Swapping an 86 5.0 into an 87 GT?

  • Thread starter Thread starter psycho78
  • Start date Start date Mar 19, 2010
Prev
  • 1
  • 2
  • 3
First Prev 3 of 3
R

RatStang

New Member
Feb 11, 2010
544
0
0
Mar 24, 2010
#41
  • Mar 24, 2010
  • #41
psycho78 said:
Hey guys, I apologize if it came off as if I were dead set on changing it - I should really clarify whats going on. I have a mechanic and a 2nd engine - however, I am having the mechanic go through the engine first to find out if he can see what the problem is. Currently he thinks it could be the computer. Hes having it checked in the morning. I basically have the 2nd engine as an alternative if he cannot figure this out. He seems to know his stuff. If he gets the 87 running, hes keeping the 86 in payment, if he swaps 'em, hes keeping the 87. I did stress to him to try and keep the 87 in after hearing everyone's opinions.
Click to expand...


That's sounds like more of a plan to me.
 
P

psycho78

New Member
Mar 19, 2010
32
0
0
Tampa, FL
Mar 24, 2010
#42
  • Mar 24, 2010
  • #42
Hey guys, I figured Ill try and update this as we go along. Today, he had the motor turning over just no spark which is a great sign. At least its not seized and we're thinking we can probably keep the stock motor in but may have to pull a few things off the 86 to replace anything thats bad. Hes checking wires and the computer first. Heres a few pics of the beginning. We're taking photos as we go through it. This is Monday, the day I first hauled it over there. 1 of the outside and 1 of the engine. I think its a pretty solid car for a mere $700.

[/URL][/URL]
 

Mikey1968

Member
Nov 1, 2003
232
0
17
Kommiefornia
Mar 24, 2010
#43
  • Mar 24, 2010
  • #43
Giving her some TLC....go for it! Awesome!
 
F

FoxChasis

20+ Year Stangneter
Dec 23, 2003
589
276
93
Apr 11, 2010
#44
  • Apr 11, 2010
  • #44
Vinnietbird said:
The '86 cam was slightly more aggressive than the '87 up 5.0 H.O,and you can swap an '86 engine into the car with no worries.Even a Mass Air car.I've done it.
Click to expand...
The cam is not different.

The H.O. roller cam is the same from '85 through very late '88.
 
R

RatStang

New Member
Feb 11, 2010
544
0
0
Apr 12, 2010
#45
  • Apr 12, 2010
  • #45
FoxChasis said:
The cam is not different.

The H.O. roller cam is the same from '85 through very late '88.
Click to expand...

Not true. Pretty much any Mustang History site worth it's salt will tell ya different.

I've also seen (an attempted to find it before posting without luck), cam comparison charts for the Fox motors and through the 95. Though there were MANY Fox bodies that carried the same cams, that cannot be said for 85 all the way through late 88. If I come across a good reference, I'll come back by this thread and post. I would hazard a guess though, that a google search for model year differences would yield a result.
 
H

Hour13GT

New Member
Feb 18, 2009
5
0
0
San Antonio
Apr 13, 2010
#46
  • Apr 13, 2010
  • #46
DON'T JUST THROW PARTS (or motors) AT A PROBLEM!!! Find out what the problem is! If it isn't cranking, a new motor IS NOT going to fix it. Is this a good buddy? Or more to the point, a good mechanic?

No mechanic worth his salt would tell you to replace the motor at this point man. Find out why it's not starting. Pull the plugs & pour a bit of Marvel Mystery Oil into the cylinders, prime the oil pump, turn the crank with a wrench. Then try to start it.

If you can hand-turn the crank, but it won't crank off the key... it's not the engine. It's in the ignition/starting system. Electrical, not mechanical.
 
F

FoxChasis

20+ Year Stangneter
Dec 23, 2003
589
276
93
Apr 13, 2010
#47
  • Apr 13, 2010
  • #47
DontGivaRatz said:
Not true. Pretty much any Mustang History site worth it's salt will tell ya different.
Click to expand...
Is true.

Post up any "Mustang history 'site" that says different. There is a lot of BS info on the Internet, and people just believe it and post up the bad info along with the good. I will respond when I see wrong info posted on any message board I participate. I'll be happy to refute anything else these "Mustang history 'sites" you speak of have wrong.

DontGivaRatz said:
I've also seen (an attempted to find it before posting without luck), cam comparison charts for the Fox motors and through the 95. Though there were MANY Fox bodies that carried the same cams, that cannot be said for 85 all the way through late 88. If I come across a good reference, I'll come back by this thread and post. I would hazard a guess though, that a google search for model year differences would yield a result.
Click to expand...

'85-late '88 H.O. 5.0L cam engineering part number: E5ZE-6250-AA
late '88-'89 H.O. 5.0L cam engineering part number: E8ZE-6250-CA

E5ZE-6250-AA specs

Valve timing events:
IVO: 17º BTDC
IVC: 69º ABDC
EVO: 67º BBDC
EVC: 19º ATDC

Duration: 266º
Overlap: 36º
Lobe/Valve Lift: .278"/.444"
Lobe Centerline: 115º

E8ZE-6250-CA specs*

Valve timing events:
IVO: 20º BTDC
IVC: 76º ABDC
EVO: 67º BBDC
EVC: 19º ATDC

Duration: 276º intake/266º exhaust
Overlap: 39º
Lobe/Valve Lift: .278"/.444"
Lobe Centerline: 116º intake/115º exhaust

*Effective with engine build dates on or after August 8, 1988, the "E8ZE" cam's intake and exhaust lobe contours were revised to reduce valvetrain noise. Although the change did not affect the cam's lift of phasing specifications, it does reduce actual engine output by three horsepower.

There were only three Ford/Lincoln/Mercury models from '85 through '88 that had the H.O. 5.0L engine...

'85-'86 Capri
'85-'88 Mustang
'87-'88 Mark VII

All other F/L/M models that had a 5.0L engine had a "standard output" 5.0L and if the cam as roller, it had different specs.
 

1987LXragtop

Member
Jan 26, 2008
837
3
18
Just outside Philly PA
Apr 13, 2010
#48
  • Apr 13, 2010
  • #48
where is the update this car should be running by now??
 
Prev
  • 1
  • 2
  • 3
First Prev 3 of 3
You must log in or register to reply here.

Similar threads

F
Electrical Foxbody wiring harness 2.3 to v8 swap
  • Foxbodyjake
  • Mar 23, 2026
  • Fox 5.0 Mustang Tech
  • 2
Replies
24
Views
719
Fox 5.0 Mustang Tech Apr 13, 2026
Foxbodyjake
F
S
Fox '87 GT can't get to stay running
  • spilly
  • Mar 29, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
27
Views
827
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jun 20, 2026
spilly
S
D
Foxbody Misfire 5.0 Swap
  • DPORTER0729
  • May 2, 2025
  • Fox 5.0 Mustang Tech
Replies
7
Views
624
Fox 5.0 Mustang Tech Jul 13, 2025
90sickfox
B
No spark. 1990 foxbody 5.0 gt
  • Boogi
  • Nov 16, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
0
Views
188
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Nov 16, 2025
Boogi
B
0
V6 to V8 Swap info
  • 02_2v_Curtis
  • Jan 11, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
0
Views
733
1996 - 2004 SN95 Mustang -General/Talk- Jan 11, 2026
02_2v_Curtis
0
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?