Engine swap fuel line routing/tech questions.

ratio411

Founding Member
Apr 21, 2002
3,870
73
109
Pensacola FL
Hey,

My son just swapped his 81 I-6 over to 88 HO.

One of our last obstacles is the fuel lines for EFI.

The donor car was a Lincoln Mark, so the fuel lines are:

A: Stock
B: Ancient
C: Ill fitting

So, what I need to know is a good way to either custom make fuel lines, or modify the parts I have to fit. I need to know what rubber line is acceptable for use, what clamps, and how to keep the hard lines where they mount to the fuel pump and fuel rails.

My son is a teen, so we are on a budget. We need a good way, a simple way, a safe way... We'd like to do it the 'best' way, but that is probably expensive.

Actually, the worst part of the Mark fuel lines are the plastic sections. The steel sections fit very well, but the longer car made for long sections of plastic. Fitting into the smaller car has made for tight bends, excess line, and even some crimps trying to form in the plastic.

Can I remove all the plastic sections and replace them with rubber?
What rubber line can handle the 40ish psi of the EFI system?
What clamps will work under that pressure?

I am generally a carb guy, but I figure that I can't just throw 5/16" rubber hose on here with worm gear clamps... Or can I?

IDEAS ARE WELCOME!
THANK YOU!!
Dave
 
  • Sponsors(?)


ratio411

Founding Member
Apr 21, 2002
3,870
73
109
Pensacola FL
Fwiw, the swap has gone very well so far.
I tried modding the Mark wiring harness to work in the 81, but it was way over complex with many of the unneeded luxury/tech systems tied into the EFI harness, so we ended up file 13ing the Mark harness and got a ready made 88-93 Stang harness, just like Painless, but a different brand. Easy cheezy.

Since the wiring debacle, the son picked up an X-pipe exhaust, aftermarket headers, eliminator pullies, and he confiscated my Exploder intake that I had stashed for use "one day" on an undetermined project.

So now we are dealing with all the mods and put the wiring on hold till the end.

Yesterday I made plugs for the holes in the back of the heads, converted the larger Exploder TB to fit the Mustang style linkage/wiring harness, and did some modding to the GT 40 intake by drilling tapping holes, and tapping a pipe plug into the exhaust port originally ment fo the the EGR, which is eliminated in the wiring harness. Also modded his Mark intake tubing for the new MAF. The Mark was an early 88, and still on SD. The wiring kit is for a MAF system. So I picked up a 93 MAF at the u-pull for 25 bux.

NOW WE JUST NEED AN 88-93 MAF STYLE ECM TO FINISH....
WOULD YOU HAVE ONE? Auto trans...
The Mark ECM won't work with the new harness.
The u-pull gets 25 bux for an ECM, but 5.0 Stangs aren't really overflowing the u-pulls. :(
 

ratio411

Founding Member
Apr 21, 2002
3,870
73
109
Pensacola FL
No one has any tips on rebuilding/updating fuel lines? :shrug:

We picked up a remanned ECM from Auto-Zone.

Personally I can't stand AZ, and go for Advance, as I have a commercial account there, but Advance gave me a big run around on getting the ECM, and wanted a $45 core. AZ was cheaper and no core.
 

Chrome_Rust

Member
Dec 5, 2008
530
1
17
Findlay, Ohio
I would use 3/8" brake lines for the feed for your fuel lines and 5/16" for the return. you can use the ready made sections of brake line and unions. They also make 50psi fuel injection rubber hose and specific fuel injection clamps. I would do it in a pinch like that. just route the lines away from heat, moving parts and rabid panda's. Use a good quality fuel injection rated fuel filter and go to town....
 

ratio411

Founding Member
Apr 21, 2002
3,870
73
109
Pensacola FL
Just route the lines away from... ...rabid pandas.
:rlaugh:
I'll remember that... Those rabid pandas are always screwing up something!:nice:


So, I can possibly keep the very ends, front and rear, then build the 'centers' out of steel line... Then connect the stock ends to the custom lines with high pressure rubber line. ???

Sounds like a good idea as long as I find trustworthy clamps.
I have some brake line and tubing benders...

I'd like to keep the stock filter. It 'fell' right into place on the car and fits very well. I'll just have to figure a way to keep the stock filter connections. Otherwise I'll have to use a threaded filter off another EFI vehicle type.

THANKS!
Dave

Any other suggestions, tips to avoid pitfalls, etc... are welcome!
 

ratio411

Founding Member
Apr 21, 2002
3,870
73
109
Pensacola FL
Chrome,

I see you run the Exploder intake.

We are using the HO, Mac headers, and 2.5" mandrel x exhaust, with 2.5" race bullets.

The engine was surprisingly stout in the Lincoln Mark when we bought it. What kind of increases are we going to get with these mods on a stock long block?

We are using the Exploder intake, Exploder TB (looked quite a bit larger), and a stock 55mm MAF.

I know the MAF is a bottleneck, but with all the EGR, AIR, A/C, and tiny 2" exhaust gone, I figure we still have made some healthy gains. The free flow mufflers alone should be good for 10 rwhp in my past experience.

With all the above mods, would you agree we might see as much as 25-30 rwhp?

What do stock SD HOs get for RWHP with AODs?

It's not my car, but I really am dying to hear it run with those Dynomax bullets...
I ran a single Dynomax 3" on my Z28 and it sounded gorgeous! Deep and mellow at idle, then pure NASCAR at WOT.
The big variable will be the dual exhaust thing. It might end up nasty loud. ???
 

ratio411

Founding Member
Apr 21, 2002
3,870
73
109
Pensacola FL
One more GT40 intake question...

The aftermarket harness has built in eliminators for the EGR and such.
So I bolted the TB directly to the upper, no EGR block of any sort.
I tapped and pipe plugged the hole between the runners to keep any exhaust from getting to the upper.
I also plugged the holes in the back of the heads.

Are there any other holes, passages, internal plumbing that I need to consider?
I don't want any exhaust or heat flowing either open or around the incoming cool air.


Edit:
The GT40 lower didn't have an intake air temp sensor, so I drilled and tapped the boss that matches the stock location on the original HO lower.

I am second guessing that now. That location will see more heat than some other options, and I want the car to run best for the temp of the incoming air.

If I move the sensor to the tube between the MAF and TB, the sensor will read a lower temp than stock. Am I right thinking that this location could cause the car to run rich? If so, the headers and free flow exhaust would tend to cause some cars to run lean, so it should even out???

Or is the stock computer just not that responsive as to make a difference?
(But then why would you need the sensor?)

I apologize for all the elementary questions... I am learning though! :)
 
Thread starter Similar threads Forum Replies Date
Cameron96 Engine Fox engine swap - cranks, fuel, spark and no start! Fox 5.0 Mustang Tech 3
J questions for 2.3 to 5.0 carb swap Fox 5.0 Mustang Tech 5
D 97 cobra engine swap... HELP ... SN95 4.6L Mustang Tech 1
W 1997 Mustang Engine Swap.. Am i hurting the new engine? 1996 - 2004 SN95 Mustang -General/Talk- 9
justinc87 2005 4.0 to 4.6/5.0 Swap 2005 - 2009 Specific Tech 4
A ISO SUPERCHARGER 98 GT PI SWAPPED WITH O3 SOHC PI ENGINE 1996 - 2004 SN95 Mustang -General/Talk- 1
G engine swap 1996 - 2004 SN95 Mustang -General/Talk- 2
JimmyJamTheHamSlam Part Suggestions 1996 / 1998 4.6L DOHC Mashup Engine Rebuild SVT Tech Forum 0
H 8 bolt crank to 6 bolt crank swap???? SN95 4.6L Mustang Tech 1
S Explorer engine swap 1994 - 1995 Specific Tech 4
L Engine Engine Swaps? 1974 - 1978 Mustang II Talk & Tech 9
M 1968 ford mustang coupe engine swap budget 1965 - 1973 Classic Mustangs -General/Talk- 2
C 1995 Mustang 5.0 HO standalone harness 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 14
PakstinN cam swap w/ 11r 190 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 16
B Crown Vic-Mustang GT engine swap SN95 4.6L Mustang Tech 2
79pace Engine Engine Swap - lots of upgrades, not running quite right Fox 5.0 Mustang Tech 136
dvelek Exhaust System 65 Mustang 347 Engine Swap Classic Mustang Specific Tech 12
W 97 Mustang GT Engine Swap From 2011 CVPI Injectors SN95 4.6L Mustang Tech 2
gonzo.ayres 1980-1982 4.2 V8 to 5.0 V8 swap Fox 5.0 Mustang Tech 10
D Engine Engine swap SN95 V6 Mustang Tech 3
C Engine swap 94 gt 5.0 1994 - 1995 Specific Tech 2
S Engine 2000 3.8 Engine Swap to 94 SC! SN95 V6 Mustang Tech 5
1978Cobra2 PATS Issues on Engine Swap 1996 - 2004 SN95 Mustang -General/Talk- 21
W 97 Mustang GT Engine Swap (Need Help) 1996 - 2004 SN95 Mustang -General/Talk- 5
K Engine swap help Other Auto Tech 1
S Engine 2001 Cobra engine swap SN95 4.6L Mustang Tech 2
G 2001 V6 mustang engine swap The Welcome Wagon 9
dvelek 65 Mustang 289 Swap Engine or Rebuild Classic Mustang Specific Tech 7
3 Swapping 2002 3.8 mustang engine to 99 mustang car 1996 - 2004 SN95 Mustang -General/Talk- 0
O Engine swap 1996 - 2004 SN95 Mustang -General/Talk- 2
P Help!! Open Injector Circuit Codes SN95 4.6L Mustang Tech 21
P Help!!! Injector circuit open on my 2004 swapped engine The Welcome Wagon 1
F Swapping engines...Anybody ever swapped ABS into a Non ABS New Edge? 1996 - 2004 SN95 Mustang -General/Talk- 2
L 2010 mustang v6 engine swap. 2005 - 2014 S-197 Mustang -General/Talk- 1
M Transverse to longitudinal engine swap 1974 - 1978 Mustang II Talk & Tech 6
J Engine Swap SN95 4.6L Mustang Tech 5
T Questions to PI Engine swap 1996 - 2004 SN95 Mustang -General/Talk- 12
L Progress Thread 83 Convertable Engine swap 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 156
D Engine Looking for advice on a cobra swap into a gt SN95 4.6L Mustang Tech 4
B Engine swap 2002 v6 to a 2002 v8 1996 - 2004 SN95 Mustang -General/Talk- 3
K 1978 engine swap v6 to??? 1974 - 1978 Mustang II Talk & Tech 9
cameronc77 Fox '88 GT Vert engine swap 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 7
cameronc77 Engine swap foxbody Fox Engine Swaparoo 6
D Engine rebuild or swap Classic Mustang Specific Tech 2
R Electrical Engine Swap HELP SN95 4.6L Mustang Tech 1
S 1996 Mustang (Originally a V6 232) Engine Swap 1996 - 2004 SN95 Mustang -General/Talk- 0
Goich1990 SN95 Engine swap 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 4
R Swapped in a PI engine in my 1998 GT now not getting power SN95 4.6L Mustang Tech 0
T Engine 2008 Mustang V6 4.0L and 2008 Crown Vic V8 4.6L engine swap 2005 - 2014 Specific V6 Tech 2
S Are there any shops that do engine swaps in the Houston Area? 1996 - 2004 SN95 Mustang -General/Talk- 0
Similar threads