Going To Attempt A MAF To SD, And SD To MAF Conversion... Please Help

BowTie Eater 5 Liter · 07-27-2002, 12:59 AM

I am going to attempt to swap out my speed density system, and put it in my buddys MAF car, and his maf into my car.

are there any good sites that explain how to do this?

who will gain power, and how much?

Thank You

PKRWUD · 07-27-2002, 02:05 AM

Don't know how much it will help, but these are my notes for switching from SD to MA:

Wiring mods necessary to install MAF into a SD system.

You will need a MAF ECM with matching injectors.

Homemade MAF power signal harness into SD EEC IV connector (for use with a MAF ECM)

Parts:
MAF connector
4 wires
2 EEC IV connector pins

Attach the 4 wires to the MAF connector

The wire in MAF connector pin:
"A" is spliced into the wire at EEC pin 37
"B" is spliced into the wire at EEC pin 40 or 60
"C" has a EEC pin soldered to the other end, and is inserted into location 9 in the EEC connector
"D" has a EEC pin soldered to the other end, and is inserted into location 50 in the EEC connector.

(if your MAF connector has 5 pins {A-E}, connect as above: A is the same, B is left empty, and C-E are the same as B-D above)

Smog Pump wiring at the EEC connector must be changed as follows:
Move the wire in position 51 to position 38
Move the wire in position 11 to position 32
If necessary, splice in extra wire to reach these new locations

Leave injectors 1 and 2 the way they are and on the remaining injectors leave the VPWR the way they are also just adding the "trigger" (ground) wires from the processor to the injectors. Pin 12 is injector 3, pin 13 is injector 4, pin 14 is injector 5, pin 15 is injector 6, pin 42 is injector 7 and pin 52 is injector 8. Injector 1 remains pin 58 and injector 2 remains pin 59.

Take care,
~Chris

BowTie Eater 5 Liter · 07-27-2002, 02:11 AM

oh boy, i wish i knew what i was doing...

does anyone have a site with pictures to help along the way?

Thanks

PKRWUD · 07-27-2002, 02:21 AM

This is for F150's, but it will work fine for you:

SD to MAF Instructions (w/ pics!)

Take care,
~Chris

88workcar · 07-27-2002, 05:46 AM

I have a complete conversion. It has been in my shed for three years. I don't think that I will ever make the swap. I also think you will slow down. "Fighten it till the end, Long live SPEED DENSITY"

Good luck whatever you choose to do. Jason

Mach 1 · 07-27-2002, 08:53 AM

Ive done this conversion and it was simple. There was no fuel injector modifications required. the trucks are not sequential, thus the additional work involved in converting a truck, but a mustang 5.0 SD to mass air, both are sequential injected.

There are a couple wires to be swapped around, and the install of the Meter, wiring harness, swapping ECM's, and you modify the MAP/BAP sensor. thats all there is to it.

PKRWUD · 07-27-2002, 08:56 AM

Quote:

Originally posted by Mach 1
There was no fuel injector modifications required. the trucks are not sequential, thus the additional work involved in converting a truck, but a mustang 5.0 SD to mass air, both are sequential injected.

Good point. I should have paid closer attention before sharing my notes! They were from my F150 folder.

Take care,
~Chris

Dark_5.0 · 07-27-2002, 10:42 AM

Expect to run a tenth or 2 slower.

BowTie Eater 5 Liter · 07-27-2002, 01:10 PM

hey, thanks for all the replys, but how do i modify the map/bap sensors?actually, what is the map/bap sensor for that matter?
could we just trade them from each other while we are doing the swap?

my buddys car is going to have all my computer stuff(speed density system) and will his car still work fine?

Thanks.

Oh, He will pick up some power on this one, right?

Mach 1 · 07-27-2002, 01:42 PM

The map/bap sensor is the same thing basically. Its on the firewall, near the middle.

On the speed density car, it will have a vacuum line going to the intake manifold(it reads manifold absolute pressure) and on the MAF car, it will not have a vaccum line and it will read (barometric air pressure). Its basically used as a back up sensor in the MAF car.

So on the maf car, leave the vacuum port open to atmoshere on the sensor, and plug the port on the intake where it was going.

on the SD car, hook up the vacuum line.

Im just recalling this from memory, and havent looked it up, so I might be missing something, but that should get you going in the right direction.

07-27-2002, 12:59 AM	#1
BowTie Eater 5 Liter Registered Member Join Date: Nov 2000 Location: Maple Ridge B.C. Canada, The Best Place In The World Posts: 871	Going To Attempt A MAF To SD, And SD To MAF Conversion... Please Help I am going to attempt to swap out my speed density system, and put it in my buddys MAF car, and his maf into my car. are there any good sites that explain how to do this? who will gain power, and how much? Thank You __________________ 1984 Bronco II, 36" Michelin Military Tires, 95 EFI 5.0, NP435 Tranny, NP208 Doubler, NP205 Transfer Case, Fill Size Solid Dana 44 Front End, WH Progressive Rate Rock Crawling Coils, Bronco 8.8 Rear, Skyjacker Softride Leafs, 5.13 Gears, Detroit Locker. Final Crawl Ratio Of 175:1 88 GT Best 60ft. 2.181 Best ET 14.350 Best MPH 98.01 ~WRECKED!!!!~

07-27-2002, 02:05 AM	#2
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Don't know how much it will help, but these are my notes for switching from SD to MA: Wiring mods necessary to install MAF into a SD system. You will need a MAF ECM with matching injectors. Homemade MAF power signal harness into SD EEC IV connector (for use with a MAF ECM) Parts: MAF connector 4 wires 2 EEC IV connector pins Attach the 4 wires to the MAF connector The wire in MAF connector pin: "A" is spliced into the wire at EEC pin 37 "B" is spliced into the wire at EEC pin 40 or 60 "C" has a EEC pin soldered to the other end, and is inserted into location 9 in the EEC connector "D" has a EEC pin soldered to the other end, and is inserted into location 50 in the EEC connector. (if your MAF connector has 5 pins {A-E}, connect as above: A is the same, B is left empty, and C-E are the same as B-D above) Smog Pump wiring at the EEC connector must be changed as follows: Move the wire in position 51 to position 38 Move the wire in position 11 to position 32 If necessary, splice in extra wire to reach these new locations Leave injectors 1 and 2 the way they are and on the remaining injectors leave the VPWR the way they are also just adding the "trigger" (ground) wires from the processor to the injectors. Pin 12 is injector 3, pin 13 is injector 4, pin 14 is injector 5, pin 15 is injector 6, pin 42 is injector 7 and pin 52 is injector 8. Injector 1 remains pin 58 and injector 2 remains pin 59. Take care, ~Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

07-27-2002, 02:11 AM	#3
BowTie Eater 5 Liter Registered Member Join Date: Nov 2000 Location: Maple Ridge B.C. Canada, The Best Place In The World Posts: 871	oh boy, i wish i knew what i was doing... does anyone have a site with pictures to help along the way? Thanks __________________ 1984 Bronco II, 36" Michelin Military Tires, 95 EFI 5.0, NP435 Tranny, NP208 Doubler, NP205 Transfer Case, Fill Size Solid Dana 44 Front End, WH Progressive Rate Rock Crawling Coils, Bronco 8.8 Rear, Skyjacker Softride Leafs, 5.13 Gears, Detroit Locker. Final Crawl Ratio Of 175:1 88 GT Best 60ft. 2.181 Best ET 14.350 Best MPH 98.01 ~WRECKED!!!!~

07-27-2002, 02:21 AM	#4
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	This is for F150's, but it will work fine for you: SD to MAF Instructions (w/ pics!) Take care, ~Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

07-27-2002, 05:46 AM	#5
88workcar Registered Member Join Date: Oct 1999 Location: Pierre Part, La. U.S.A. Posts: 1,850	I have a complete conversion. It has been in my shed for three years. I don't think that I will ever make the swap. I also think you will slow down. "Fighten it till the end, Long live SPEED DENSITY" Good luck whatever you choose to do. Jason __________________ 88workcar 1988 Mustang LX 342. 417rwhp @ 6800. 28 X 10 ET Drag, 4.30s, 10.69 @ 126.43 1.42 60ft. 11.13 @ 127.7 on BFGs 1.72 60ft Rice Hater # 42 To be old and wise, You must first be young and stupid I'm somewhere in tthe middle.

07-27-2002, 08:53 AM	#6
Mach 1 Registered Member Join Date: May 1999 Location: Georgia Posts: 3,866	Ive done this conversion and it was simple. There was no fuel injector modifications required. the trucks are not sequential, thus the additional work involved in converting a truck, but a mustang 5.0 SD to mass air, both are sequential injected. There are a couple wires to be swapped around, and the install of the Meter, wiring harness, swapping ECM's, and you modify the MAP/BAP sensor. thats all there is to it. __________________ 2002 GT 1993 GT (SOLD) '93 Mustang GT RHC member #142

07-27-2002, 10:42 AM	#8
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	Expect to run a tenth or 2 slower. __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

07-27-2002, 01:10 PM	#9
BowTie Eater 5 Liter Registered Member Join Date: Nov 2000 Location: Maple Ridge B.C. Canada, The Best Place In The World Posts: 871	hey, thanks for all the replys, but how do i modify the map/bap sensors?actually, what is the map/bap sensor for that matter? could we just trade them from each other while we are doing the swap? my buddys car is going to have all my computer stuff(speed density system) and will his car still work fine? Thanks. Oh, He will pick up some power on this one, right? __________________ 1984 Bronco II, 36" Michelin Military Tires, 95 EFI 5.0, NP435 Tranny, NP208 Doubler, NP205 Transfer Case, Fill Size Solid Dana 44 Front End, WH Progressive Rate Rock Crawling Coils, Bronco 8.8 Rear, Skyjacker Softride Leafs, 5.13 Gears, Detroit Locker. Final Crawl Ratio Of 175:1 88 GT Best 60ft. 2.181 Best ET 14.350 Best MPH 98.01 ~WRECKED!!!!~

07-27-2002, 01:42 PM	#10
Mach 1 Registered Member Join Date: May 1999 Location: Georgia Posts: 3,866	The map/bap sensor is the same thing basically. Its on the firewall, near the middle. On the speed density car, it will have a vacuum line going to the intake manifold(it reads manifold absolute pressure) and on the MAF car, it will not have a vaccum line and it will read (barometric air pressure). Its basically used as a back up sensor in the MAF car. So on the maf car, leave the vacuum port open to atmoshere on the sensor, and plug the port on the intake where it was going. on the SD car, hook up the vacuum line. Im just recalling this from memory, and havent looked it up, so I might be missing something, but that should get you going in the right direction. __________________ 2002 GT 1993 GT (SOLD) '93 Mustang GT RHC member #142

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