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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 05-10-2015
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need info and help with a 4.0 SOHC V6 swap

need info and help with a 4.0 SOHC V6 swap.
OK. i need help with my project. yes it is still only on paper, and yes it isnít a Ranger. but the engine iím planning on using is a 4.0 SOHC V6. Which came in the Rangers. iíve been searching the internet like a mad man. i think iím beginning to work myself up into some kind of BCM psychoses of some type. lol...

well my project is to take a 79-86 Ford Mustang and put a 4.0 SOHC V6 and the T5 out of a 05-09 Ford Mustang and put it into the early Fox. and going to pull a 8.8 out of a later Fox ( 87-93 ) and put it into the early Fox. mechanically everything should work out. but electronically.... thatís where iím losing my mind. i have figured most of it out. but everything i read says i have to use the dash out of the 05-09 Ford Mustang because, something about the BCM. but i want to keep the 79-86 Ford Mustang instrument cluster fairly stock. donít mind adding tack, oil, temp, and other aftermarket gauges. you know. like the little 3 pack gauges under the dash, or the one or two gauges on the pillar. but i donít want to sawzall out the instrument cluster on the 79-86 Ford Mustang and duck tape the 05-09 Ford Mustangís in place of it.

so does anyone know a way around this. where i donít have to use the instrument cluster out of a 05-09 Ford Mustang. isnít there some kind of programmer that can delete the need for the BCM? there are programmers that can undo the PATS, there are programmers that can delete the need for ABS, and there are programmers that ables you to change gearing and tire sizes. but is there anything that will allow me to discard the instrument cluster?

or am i overlooking something and iím just ranting and raving like some kind of lunatic.
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Old 05-11-2015
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Not sure why you would have to change the dash instruments??

Oil pressure and temp are analog on both, you would want to switch the Ford oil Switch to PS60 sender so you would get "real oil pressure".

I would try using a pre-'95 4.0l OHV Computer, the EEC-IV from a Mustang with manual trans, they had sequential injection available, Rangers were all Batch fire I think, which is fine to use but sequential is better for MPG and performance.
And use an EDIS-6 ignition module for spark.
It should work with Crank position sensor on SOHC but can't say for sure

The SOHC does have a Knock sensor, and for good reason, compression ratio is 9.7:1 which means it WILL ping/knock on regular gas(87 octane), the knock sensor would cause the computer to retard the spark when pinging was detected, allowing regular gas to be used.
OHV computer will not have knock sensor input.
Answer here is, do not run regular gas, lol.

1997 4.0l SOHC computer from an explorer will not have PATS, later years all have PATS, also manual trans model would be hard to find, you need a manual trans computer.
Yes, programmers can disable PATS on the later years

You will need a high pressure fuel pump and will need to keep fuel tank's original sender(for fuel gauge)

Ford calls it's computers a PCM, powertrain control module, it runs the fuel injection mainly but in 1995 the PCM changed to EEC-V model which also ran spark.
PCMs starting in the '80s also ran the shifting points for automatic transmissions, if you use a PCM that is programmed for automatic trans on a manual trans then computer will turn on Check Engine Light(CEL) and in some cases odd idle and RPM issues will show up as well, PCM is looking for trans hook up which isn't there.


2005–2010 Mustangs had 4.0l SOHC engines with manual trans available, why not just get a wrecked one and swap it all over including PATS keys

Last edited by RonD; 05-11-2015 at 12:52 PM.
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Old 05-11-2015
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Well first. thank you for replying to my post

Quote:
Originally Posted by RonD View Post
Not sure why you would have to change the dash instruments??
well what i have read is that the Body control module (BCM) and the powertrain control module (PCM) are linked together. somehow....maybe i'm just getting my info confused. this is what someone said on another forum.

Quote:
Originally Posted by dude from another forum
Computer: Nothing. You have to use the Mustang 4.0 V6 manual one though. Use its stock OBDII, and reto fit the 2007 dashboard, and fit it into dash binnacle....
Quote:
Originally Posted by dude from another forum
If you use a manual trans, it has to be a from a manual car. Axle ratio should be the same as the donor vehicle. mph per 1000 rpm should be the same as it was in the 2007 SN197...
Quote:
Originally Posted by dude from another forum
Body control computer can be a pest, PUC code for smartlock and ABS removal is reasonably easy. The VSS on the trans has to see the normal info...
maybe the dude thought i was trying to do some kind of Chip Foose retro rode. or something.

Quote:
Originally Posted by RonD View Post
Oil pressure and temp are analog on both, you would want to switch the Ford oil Switch to PS60 sender so you would get "real oil pressure".
so it seem kinda straight forwards. pull all of the wiring, PCM, trans, and engine out of the SN197 Mustang and put it in the early Fox..... i know easier said the done.

Quote:
Originally Posted by RonD View Post
The SOHC does have a Knock sensor, and for good reason, compression ratio is 9.7:1 which means it WILL ping/knock on regular gas(87 octane), the knock sensor would cause the computer to retard the spark when pinging was detected, allowing regular gas to be used.
OHV computer will not have knock sensor input.
Answer here is, do not run regular gas, lol.
doesn't all EFI have a knock sensor? even my 87 has something to turn back the timing if it detects detonation.

Quote:
Originally Posted by RonD View Post
2005Ė2010 Mustangs had 4.0l SOHC engines with manual trans available, why not just get a wrecked one and swap it all over including PATS keys
if i remember. the PATS isn't just the ignition switch and key.
as for swapping everything else. that's was i had in mind.

i'm looking at the 05-09 4.0 SOHC, bc they came with 210 HP from the factory. the SN197 Mustang had a T5 behind that engine. my thinking is, if you put that in the early fox which weighs about 2700 lbs. it should get even better MPG's and would be fairly fast even if i keep it stock.
but i know i won't. it may start out stock, but it won't stay stock. Procharger makes a kit for the 05-09 Ford Mustang 4.0 SOHC V6. and there are other site that has high performance stuff for the 4.0 SOHC V6.
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Old 05-11-2015
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Never heard of a BCM, but it could be called that, Rangers got a GEM(generic electronic module) in late '90's, it ran interior lights, wipers and monitored gauges, it did connect with PCM but as far as I know it wouldn't be needed in a swap, it basically controlled electrics not related to engine or trans operation.

Later model PATS(2002 and up) had the key test routine in the PCM.
PATS keys have an RFID tag embedded in the plastic handle, these require no batteries.
There is a Wand(antenna) around the key switch connected to the PCM.
When key is turned on the Wand sends out a radio(RF) burst, this gives the RFID tag enough power to transmit it's unique ID number back to the Wand.
The PCM gets that ID and compares it to a list of IDs that were programmed in at the factory, Ford dealers and locksmiths can add IDs to PCM, and if owner has 2 working PATS keys he can added more keys himself.
If the PATS key's ID number matches one in PCM memory then PCM turns on fuel pump and injectors for starting, some also have a starter motor relay that will disable starter if there is no match.

So all you really need if you have the PCM are the Keys programmed for that PCM, and the wand, it is generic, any PATS wand will work.
Some have just put the PATS key in the wand and taped it up under the dash, so they use regular key and when PCM starts it sees the right PATS key every time, kinda defeats the purpose of the Passive anti-theft system through, lol.

Just a few Rangers had knock sensors, the engines were for the most part under 9.2:1 compression ratio so 87 octane wasn't an issue, and most had EGR system which helps alot to prevent pre-ignition.

Manual trans PCMs don't really need speed signal(VSS) they are not shifting so speed doesn't really matter, they did add an emissions/MPG change in the 2000's for manuals through, when speed was above 5mph and you pushed the clutch pedal in(PCM monitored clutch switch) the RPMs would stay were they were for 3 to 5 seconds, for easier shifting, and then drop but only to 1,000rpms not idle, when speed drop to under 5mph then computer would lower RPMs to idle.
This was better for emissions and MPG as well.

I would use an older T5 with mechanical speedo cable hook up(for your stock dash), and add a VSS to that
Dakota Digital does have a $300 electric motor to drive stock cable driven speedometers, using VSS signal, for use on older classics, but expensive for what you are doing.

Last edited by RonD; 05-11-2015 at 10:41 PM.
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Old 05-12-2015
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wow, so it seems straight forwards. alot of work but straight forward and i don't mind the work.

Quote:
Originally Posted by RonD View Post
I would use an older T5 with mechanical speedo cable hook up(for your stock dash), and add a VSS to that
Dakota Digital does have a $300 electric motor to drive stock cable driven speedometers, using VSS signal, for use on older classics, but expensive for what you are doing.
i got to find the length on the older t5's, from where the bellhousing bolts to the trans, to there the shifter is. and i have to know the depth of the SN197 Mustang's 4.0 bellhousing. so i can be sure that the shifter will be in the right place. i don't mind trimming a little. but i don't want to be cutting another hole in the floor and more importantly don't want to be cutting a hole into the center console

T5 History in Ford Mustangs with specifications for World class and non-World class T5's Modern Driveline

with the T5 in the SN197 Mustang The shifter was no longer attached to the tailshaft housing. It was mounted to the body and connected by rods. and there are after market mounts you can get for that t5. i tripped over it in some Nissan forum. apparently they are pulling their trans out and using the T5 out of the SN197 Mustang. but i forgot what forum it was.
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Old 05-12-2015
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Overall I would rethink the 4.0l SOHC engine, unless there is some specific reason for it.

4cyl turbo or 302(5.0l) has more places to go than the 4.0l SOHC

4.0l SOHC is heavy, wide and has 3 timing chains, 4 with balancer

There is a reason you don't see alot of swap info out there for the 4.0l SOHC, if you have your choice of engines then most wouldn't pick it
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Old 05-12-2015
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well i was looking for a cheap, light weight, sporty car, with some power. a car that i like the looks of. and most of the cars i like are made before 1990. (matter of fact i never owned a car that was made after 1990. the newest car i have over owned is my 1987 Ford Ranger. which i have some wild ideas for. don't know if i'll ever get to them. but maybe one day. lol) so i start looking at the Mustangs, Pintos ( i only like the cruising or rally wagons, can not stand the hatchback pinto), the ford fairmont futura's (the good looking ones), Mercury Capri, and the German made ford Capri, they all was under 3000 lbs. then i looked at their engines they came with.

well...
  • the ford fairmont futura had the 2.3 lima, and the 200cid Falcon inline six...
  • the mustang II came with the 2.3 lima, and 2.8 cologne v6...
  • the fox body came with the the 2.3 lima, and the 200cid Falcon inline six, the 2.8 cologne v6...
  • the German made ford Capri came with 2.3 lima and 2.8 cologne v6
(not including the V8's in that list )

the highest stock hp for the 2.3 lima without going turbo is 119 hp in the 2000-01 ford ranger 2.5L.

well we know the 200cid Falcon inline six couldn't go through a wet paper towel. if i remember. the highest stock hp was in the 1965 mustang at 120 hp. i don't remember the horse power of the taller 250cin. but i know they have the same retarded head as the 200.

so that left me with the 2.8 cologne v6. which I know the 4.0 SOHC in the Explorer and SN197 Mustang put out 210hp stock and it's a cologne v6.

i didn't want to build another V8 car. i didn't want to go forced induction right off the bat. i was thinking it'll be cheaper if i could find a newer version of the old existing engine. i was looking at a starting hp target of 200 or more hp then slowly build up from there.

i didn't want to use the V8. the V6 should give the car a better over all balance front to rear. even with the V6 being heaver, the weight is more to the rear of the front axle alignment point. which gets the car closer the the idea 50/50 weight distribution.

the 4.0l SOHC might be wider then the 2.8, 2.9, 4.0 OHV. might be wider then the Windsors. but the 4.6 modular is wider. and they stuffed them into them foxs. the 4.0l SOHC is a 60į V, where the Windsors and the modular are 90į.

i could go with the 3.8l V6 but i don't know much on it. i know before they stopped making them they had 195 hp in the mustangs.

i decided to go with the early fox bc. i can find them, they are cheap, and i can get a **** ton of aftermarket performance suspension parts for Road Racing. and over all it is the best car for my build.
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Old 05-12-2015
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the 2.3 turbo. it had bad turbo lag. and turbo lag is not good for a tight course. and to get the 200 hp i would have to find a SVO. which will cost about $10,000 for a good one. and it tops out at about 250 hp before you have to start spending big cubic money. and to get ride of the turbo lag and keep the HP you'll have to spend big money. but i could be wrong on some of that.

where the SN197 Mustang 4.0L SOHC V6 had 210 HP stock. cam, intake, and a few other odds and edds, plus an aggressive tune. it should put out something good. and then if that not enough i can go with a Procharger. Procharger makes a whole kit for the SN197 Mustang 4.0L SOHC V6. and with a Procharger there is no turbo lag.
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Old 05-12-2015
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Quote:
Originally Posted by RonD View Post
Overall I would rethink the 4.0l SOHC engine, unless there is some specific reason for it.....................

4.0l SOHC is heavy.........
Quote:
Originally Posted by Snow Wolf View Post
...... the V6 should give the car a better over all balance front to rear. even with the V6 being heaver, the weight is more to the rear of the front axle alignment point. which gets the car closer the the idea 50/50 weight distribution.
but you did got me thinking. would the difference in weight distribution over come the extra weight. it might not. even with the V6 weight being more on the back side of the front axle, then the V8. the extra weight of the 4.0l SOHC might just equal it back out. it shouldn't make it any more nose heavy. at most it might be the same as the V8. but the 4.0l SOHC will get way better gas-mileage then the V8......

but i think i might have to look into the 3.8L V6 more. and see if it might be a better V6 for this build.

but ether way i have to do some more thinking

and thank you for letting me bonce some of these ideas off of you.
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Old 05-13-2015
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Yes, supercharger is better for known power curve, so no surprises in lag or wastegate openings, turbos are more efficient overall which is why they are the more popular choice in daily drivers.

Supercharger on a Lima would be an interesting project.
1988 Toyota MR2 came with a supercharger that was off until you pushed throttle down passed about 1/2 way, 27MPG if you drove prudently, 20MPG or less if showing off, lol.
Switched supercharger would also be an interesting project, so you get the MPG of a turbo at lower RPMs, but get the power of a turbo without the lag or wastegate issues at when you want it.
Not sure how toyota worked the air by-pass from N/A to supercharger, supercharger pulley could just use A/C compressor type clutch, like they did on Mad Max.
I wonder if all you would need is an air gate, pressure from supercharger being engaged would push it closed, when switched off vacuum pressure in intake would pull it open.

Last edited by RonD; 05-13-2015 at 04:10 PM.
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Old 05-30-2015
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A Supercharged Lima engine... i've thought about that. putting an 671 or an 871 on the 2.3. if i can get someone to do a custom intake manifold, i think it would work.... ok a 671 might be a little too much. but it'll look cool. lol

well as for my project. nothing much going on.
i know what cars i'm looking for, for the project.
#1 1979-1982 Mercury Capri. the RS would be the best. i think the 79-82 Mercury Capri RS looks bad @ss as all H3ll
#2 1983-1986 Ford Mustang. the GT looks really good between 1985 and 86.
#3 1979-1982 Ford Mustang. GT or Cobra would be nice.
#4 1983-1986 Mercury Capri. if i have to. i don't like the bobble window.

as for the 4.0 SOHC. i'm at the point, all i can do is try. i think i can figure it out. but if not. i do have a back up plan. Tom Morana makes a carb kit for the 4.0 Sohc. and MSD has a stand alone ignition system that can run off the stock crank trigger and i can use the stock coil pack. but i'm going to try putting the whole 05-09 4.0 mustang EEC-V PCM and wire harness in first and see if i can do it first.

now time to start pricing things out.

and if i get a up and running Fox. i'm thinking i might put the Fox's engine into the ranger. if i can find a fox with a carb-ed turbo... the would be nice for my ranger.
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