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3.0 - 4.0 SOHC Swap Oil pan


cargs

Well-Known Member
Joined
Aug 10, 2007
Messages
189
Vehicle Year
1993
Transmission
Manual
Background:
I am planning on swapping in a 4.0 SOHC in place of my 3.0L. i have found a 2005 SOHC motor for a good price and plan on doing a megasquirt controller with standalone EDIS-6 for ignition.

Question:
I am concerned with fitment of the SOHC oil pan as it was never offered in a RBV with the TTB front suspension. Are the oil pans the same between the 4.0 OHV and the 4.0 SOHC? Will i run into fitment problems with the SOHC motor?

thanks,

cargs.
 
I need to learn more about a megasquirt controller with standalone EDIS-6 for ignition..
I don't have a clue about them.. Why wouldn't you do a complete wire harness swap and use it like it was built?
As for the pans.. Somebody else will have to chime in here..
Big JIm
 
my truck is OBDI almost the simplest form of multiport fuel injection. the 2005 is OBDII with PATS and a host of other things. i want a 'simple' engine control system, no emissions/EGR and have the ability to tune it my self (with a wide band O2 sensor).

tons of info on megasquirt at:
http://www.msefi.com/index.php
http://www.diyautotune.com/

megasquirt 3 is coming out right now it has a ton of features
http://www.ms3efi.com/product.html

anyone else have info on the oil pans?
 
If you actually look at EDIS it really isn't all that different electrically from TFI

Actually LOOK at the wiring block diagrams in an EVTM manual
and you'll quickly realize that the differences in the wiring are
related to the extra coils and relocated components rather than from any functional difference.

This is what I'm using a second generation Escort EDIS4 system to spark the four plug 2.3(turbo) I'm putting in my next project.

Frankly I'd rather have a TFI module shoved up my ass than install
one in a vehicle I have to drive.

And THE ONE issue I have with the 2.3T is the EDIS ignition.
(I trust the DPIS system just as little)

EDIS is "Cockroach reliable", the other systems aren't.
Anyone who suggests otherwise has earned a bitch slap for stupidity.

As for Megasquirt?

Just bite the bullet and run the entire engine on EEC5, it's factory engineered,
diagnoses itself and you can get spares EVERYWHERE.

I think "Reinventing the wheel" by going aftermarket benefits you by being able to say "I'm running megasquirt" frankly I'd rather say "100k miles with ZERO issues
after I got it running"

Not sure what to tell you about the oil pan.

AD
 
thanks allend.

i'm still working out what controller to run the engine with. i see your point about the reliability issues with megasquirt (something home built).

the main thing i am trying to figure out is if the oil pans from a 98+ era 4.0L SOHC are different from a 93-96 era 4.0L OHV

just need to know if the 4.0L SOHC will bolt up to my truck without any oil pan interference.
 
are 2WD oil pans different than 4WD pans?
 
I've installed a SOHC pan on the OHV in my 91 2wd & there's no problem with clearance. Although the 4x4 cross-member is slightly wider I cannot foresee any issue. & no, there is no difference between 2wd & 4wd oil pans

As for engine management, have you considered SDSEFI ?
I've been running this system for years & it has performed flawlessly!
 
TeeRev,

Thanks for the oil pan info! do you have a build thread for your truck?

i haven't looked into SDSEFI. what did it take to put it on your truck?
 
TeeRev,

Thanks for the oil pan info! do you have a build thread for your truck?

i haven't looked into SDSEFI. what did it take to put it on your truck?

I don't have a build thread, but my build is pretty simple, 91 short-block with a SOHC pan, 95TM heads with mild porting & 988 springs. A comp 422 cam. Smith brothers 5.55" push-rods.

As for the SDS, I've made a mating harness that plugs into the factory ECU harness so that the SDS connects to all of the factory sensors & drives the injectors. I wired the SDS coil driver to the stock coilpack. & had to mount the SDS crank position sensor. It was really pretty easy & if I ever decided to reinstall the EECIV it would take less than an hour, but that won't happen!

I know that this will probably ruffle a few feathers, but here is a chassis dyno comparison of a 4.0L SOHC Mustang & my 4.0L OHV on the same dyno.

Dyno%20comparison.jpg
 
Last edited:
thats a wicked torque curve
 

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