4 cyl performance questions.

[MustangCowboy]

I currently have an n/a 4 cyl in my 91 coupe, but i would really like to turbo it. I know the easiest and best way to do so is to get a donor car and do a whole engine swap, I plan to do that at some point but not right now. If I have a turbo and intercooler and can flip the manifold and weld it up to work, is it possible to make this work. I know I will have to get bigger injectors and just get the air/fuel right, but will this just totaly screw with the computer? Is it possible to have the turbo work with the mass air rather than the vane air meeter? I've asked lots of people but nobody can help, because I haven't found anyone that has tried. If none of this is likely to work, does anyone know of some performance stuff I can do to the stock engine till I do the swap, I'm not looking to do anything to serious but little stuff. I have home made CAI but am running into problems with too much air and not enough fuel. Thanks for any help.

[hotwheels]

The biggest thing is the puter, you need to get one from a turbo'd car.......I had an arcticle on how to do this in my puter, but i can't find it right now..

[hotwheels]

Numbers ?
What years were the XR-7 (turbo) made?
84-86
What years were the Turbo Coupes made?
83-88
What years were the Svo made?
84-86
What years were the Merkur XR4TI (turbo) made?
85-89
What years were the Mustang GT (2.3turbo) made?
83-84 Gt in convertable and hatch only
79-81 The GT's were a carb. Turbo
What years were the Capri RS Turbo made?
83-84
79-82 Capri's were a carb. Turbo
Engine ?
What/where is the VAM meter?
The VAM is the Vane Air Meter, it is a pre mass air unit.
It is located on the pass. side under the air filter unit.

Which cars have the big vam and small vam?
Small Vam are found in:
85-89 Merkurs
83-86 Turbo Coupes
84-86 XR-7 Cougars
83-84 Gt turbos
83-84 Capri RS Turbo

Big Vam are found in:
All Svos
87-88 Turbo Coupes
Vam Size

What/where is the TPS?
The TPS is the Throttle Position Sensor,
it is located on the throttle body and allows the computer to read
the position of the throttle and adjust accordingly
TPS

What/where is the IAC?
The IAC Idle Air Control it is located on the throttle body
just above the TPS and helps control the idle.
IAC

What/where is the ACT?
The ACT is the AirCharge Temperature and is located on 87-88 Turbo Coupes.
measure the air coming into the intake after the turbo so the computer
can correctly alter the timing.(only found on 87-88 Turbo's.)
It is located in the lower intake manifold facing the firewall.
It is the lower of 2 sensors found in that area.
ACT

What/where is the Knock Sensor?
The Knock Sensor allows your computer to hear detonation in the engine and retard the timing.
(4 square)It is located in the lower intake manifold facing the firewall.
It is the lower of top sensors found in that area.
(4 in-line) is located in the lower intake manifold and points
at the fender.
This sensor is commonly unplugged as it to prevent unnecessary retarding
of the timing due to false detection of detonation.
Knock Sensor

What/where is the O2 sensor?
The Oxygen sensor is used to sense the presence of oxygen in the exhaust gas and
signals the computer, which can reference the voltage signal to an air/fuel ratio.
It is located on the elbow of the exhaust system which connect the turbo to the down pipe.
o2 Sensor

What/where is the FPR?
The FPR is the Fuel pressure regulator.
It helps keep a constant pressure of fuel to the engine.
It is located between the upper and lower intake manifold at the end of the fuel rail.
FPR

What/where is the BCS?
The BCS is just an electronicly controlled on and off valve.
If you look at the way it is set up with the "T" fitting,
it works the same as a bleeder valve. But instead of using an adjustable valve
it has a specific sized hole in the "T" fitting that allows a specific
amount of air to escape away from the wategate's pressure line.
The BCS either turns on to allow the air to escape away from the wastegates pressure.
Since this air is escaping then the more air is needed to reach the
diaphrams "preset" 10 PSI spring rate to allow it to push open the wastegate.
With the BCS off then all of the air pressure goes to the diaphragm and as
soon as 10 PSI is reached the wastegate is pushed open.
It is located on the passenger inner fender next
to the BAP
BCS

What/where is the Wastegate?
The wastegate is just a valve that allows air to bypass the turbo's exhaust turbine.
No air blowing on the turbine means no boost is made. It is controlled by the
diaphram that I discribed above. It is just a flapper door that is controlled
by a spring set for 10 PSI. All the turbo cars have diaphrams set for 10 PSI.
Turbo diagram

What/where is the BAP?
Also know as BPS. BAP is a derivitive of MAP.
BPS/BAP is a barometric pressure sensor. In is a minor computer input
that allows the computer to make corrections of the fuel and timing tables
for different altitudes. Air density is different at different elevations.
Just like how you had to tune a carborated car differently if you drove it
into the mountians.
It is located on the passenger inner fender next to the BCS.
BAP

Where is the PCV?
The Pcv Valve in these cars is hidden behind the alternator.
The best way to explain it is to show it (provided by the link below).
PCV

What/where is the EGR?
The EGR is the Exhaust gas re-circulation.
It allows gases from the exhuast to go back though the intake and get reburned.
It is pretty much an emmisions thing. Although it does help with gas milage,
I think that is becuase it is displacing the air and that will require less
fuel to be added since there is less air. I think thats how the gas mileage thing works.
t is attached to the throttle body near the TPS.
There is a tube that runs from the back of the exhaust manifold around the back of the
engine and to the EGR.
EGR

What fuel injector is 35bls?
The 35lb fuel injector is a low impedance fuel injector. The top of the injector is brown.
It can be found in:
85.5-86 XR-7 Cougar
85.5-88 Turbo Coupe
85-89 Merkurs
85.5-86 Svo


What fuel injector is 30lbs?
The 30lb fuel injector is a low impedance fuel injector. The top of the injector is green.
It can be found in:
83-85 Turbo Coupe
early 85 Merkur
84-85 Svo
84-85 XR7
83-84 Mustang Gt
83-84 Capri RS Turbo
Fuel Injectors

Intake manifolds, 4 in-line vs. 4 square?
The 4 in-line intake manifolds were found in pre 85.5 2.3. The runners are in a line.
The 4 square intake manifolds are found post 85.5.
These runners are slightly larger and are the more favored of the two.
Intakes

What car(s) have a Garrett T3 turbo?
**All Merkurs
**All Svos
**All 83-86 Turbo Coupes
**All 84-86 XR7,2.3 Cougars
**All 83-84 GT Turbo
**All 83-84 Capri RS Turbo

what car(s) have an IHI turbo?
**All 87-88 Turbo Coupes

What cars have what size turbo?
83-84 GT Turbo .60 & .63 A/R
83-84 Capri RS Turbo .60 & .63 A/R
84-86 XR7 Coug .60 & .63 A/R
84-85 SVO .60 & .63 A/R
85.5-86 Svo .60 & .48 A/R
83-86 TC .60 & .63 A/R
87-88 TC IHI Turbo
Early 85 XR4TI .60 & .63 A/R
85.5-89 XR4TI .60 & .48 A/R



What is the diff between a Garret and an Air Research Turbo?
There is no difference. They are the same company.

Which 2.3T were intercooled?
84-86 Svos
87-88 Turbo Coupes

Which cars have an E3 or an E6 exhaust manifold?
E3 and E6 exhaust manifolds are defined by their production number E3 means
that is was produced in 83. E6 means it was produced in 86 so all turbo
manifolds post 86 are E6.
E3 vs. E6

Trans ?
How do I know what trans i have?
83-84 GT Turbo ----T5
83-84 Capri RS Turbo----T5
84-86 Coug. XR7 ----T5 or C3
84-86 SVO ----T5
83-86 TC ----T5 or C3
87-88 TC ----T5 or A4LD
85-89 XR4TI ----T9 or C3

How do I know if my 5sp is a world class?
All t-5 transmissions after 86 are World Class T-5’s

Diff ?
What diff and gears does the Svo have?

The 84 Svo had a 3.45:1 final drive
The 85-86 Svo had a 3.73:1 final drive
All Svo mustangs came with a 7.5 rear diff.
They all were 5-lug and were rear disc brake equipped.

What diff. and gears does the TC have?

83-86
3.45:1 final drive
83-86 TC were 4 lug with rear drum brakes.

87-88
The auto had a 3.73:1 final drive
The 5sp had a 3.55:1 final drive
All 87-88 TC came with the more stout 8.8 rear diff.
They all were 4 Lug and were rear disc brake equipped

What diff. and gears does the Merkur have?
5sp final drive is 3.64:1
Auto final drive is 3.36:1
They have an 7.5 diff. from the american produced 7.5. they have a 26 spline instead of an 28

What diff. and gears does the Mustang gt have?
3.45:1
all ahd the 7.5 rear with 4 lug rear drum brakes.
What diff. and gears does the Cougar xr7 have?
3.45: 1 final drive
all had the 7.5 rear with 4 lug rear drum brakes.
What diff. and gears does the Capri RS Turbo have?
3.45: 1 final drive
all had the 7.5 rear with 4 lug rear drum brakes.

Electrical ?
What is an EEC-IV?
The EEC-IV is the Electronic Engine Control processor the vehicles are equipped with.

Where is the EEC-IV computer located?
It is inside the vehicle and is located just behind the passenger kick pannel
Computer Location

What are the diff EEC-IV? And in what cars?

84 Svo 5sp --- ZBA and TE
85 Svo 5sp --- TJ and PJ
85.5-86 Svo 5sp --- PE
83 TC 5sp --- PC1 and ZGA
84 TC 5sp --- PC1 and TF and TC
85-86 TC Auto --- PK1
85-86 TC 5sp --- PC1
87 TC 5sp --- LA and LA2
88 TC 5sp --- LA3
87-88 TC Auto --- Lb2 and LB3
88 TC Auto --- 8UA
85 XR4TI Auto --- PK
85.5-89 XR4TI Auto --- PK
85-89 XR4TI 5sp --- PF2 and PF3
83-84 GT Turbo 5sp --- TA
83-84 Capri RS --- TA
84-86 XR7 5sp --- PC1 and TA
84-86 XR7 Auto --- PK1

79-81 Carbed Turbos are NON-computer Cars


Mods ?
What K&N cone filter will attach to the Big Vam?
It is a universal 6” cone. Part number RE-0930

What options do I have to increase the fuel system?
*The fuel pump can be replaced with either:
190lb pump
255lb pump
* An adjustable FPR would be recommended
* Larger fuel injectors i.e. 30lb to 35lb or 35lb to 42lb or 42lb to 55lb

[1993SE]

you can re-pin your ecu connector and use the harness, and make it work, i can get you the link if you want. but you still need a 2.3t ecu

[DARKHORSE]

remember that a non turbo 4clylinder car has around 10-11:1 compression. so yo will need a head

[1993SE]

and you will have to make holes for the oil lines since you don't have a turbo block

[MustangCowboy]

Thanks for all the info. I was hoping i could use the stock computer but oh well. Looks like the engine swap will have to come sooner than I planed.

[$hawn]

^ good info hotwheels!

[hotwheels]

I had been planning on doing such an upgrade to my black 88 coupe.....but it was cost prohibitive at this point.

[89GT2.3H]

I suspose the puters are a bucket of $$$$ apiece.