3.8 or 4.2 swap - Ranger-Forums - The Ultimate Ford Ranger Resource


2.9L & 3.0L V6 Tech General discussion of 2.9L and 3.0L V6 Ford Ranger engines.

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 09-16-2014
Member
Thread Starter
 
Join Date: Sep 2014
Location: east coast
Posts: 2
3.8 or 4.2 swap

Hi everyone I'm a new ranger owner, mostly a mustang guy (94 cobra). I've got a 2005 3.0 (non-ffv) with auto that needs an engine (compression test didn't turn out good). I thought about just going with another 3.0, but of course wanting more power led me to looking at the 3.8 and 4.2 from the windstar and freestar since they have the same bellhousing pattern as the 3.0. Do you know if anyone has done this swap? I'm not worried about the engine mounts, they're easy enough to do and exhaust manifolds and intake from an f150 4.2 (if needed), but my biggest concern is the computer. Would the computer need to be changed to accommodate the 90 degree vs 60 degree? The injector sizes are basically the same, the firing order is the same, the cam position sensor is the same, and I believe the the crank reluctor wheel has 10 teeth spaced every 35 degrees on both engines. I'm not looking to modify the 4.2 for more power than what it has stock, just more than the 3.0. Thanks for any help!
Reply With Quote
  #2  
Old 09-16-2014
RF Veteran
iTrader: (1)
 
Join Date: Jan 2014
Location: Vancouver, BC
Posts: 7,579
Width of the 90deg V6s will be the hard part to overcome, I think the 3.0l is about 16" wide.
3.8l will be minimum 25", doesn't sound like much til you get back by the heater box and steering column, and then there is the exhaust pipes you have to fit in there as well.

302(5.0l) is only 19" wide.


Computer using MAF should be OK to use, your '05 is running 65psi of fuel pressure with no return line, your new(old) engine may need 45psi with return line
Reply With Quote
  #3  
Old 09-16-2014
Member
Thread Starter
 
Join Date: Sep 2014
Location: east coast
Posts: 2
Ron,
Thanks for the reply. I had no idea the 3.8/4.2 was that wide, guess that's why nobody is really putting them in. Is the 3.0 computer mass air? If so, and it is capable of supporting the 4.2, the worst part really is the physical dimensions. If I stick with the 3.0, could I put a small turbo on it (less than 5 psi) without having to do major mode like computer upgrade, larger injectors, etc.?
Thanks
Reply With Quote
  #4  
Old 09-16-2014
RF Veteran
iTrader: (1)
 
Join Date: Jan 2014
Location: Vancouver, BC
Posts: 7,579
Turbo or Cam upgrades simply pull more air into the engine which allows more fuel to be burned per minute, so you get more power.

MAF system reads the "mass" of the air coming in, so would read the extra air being used, it would work fine.

One point that can come up is that a stock MAF has a diameter just above that needed by the stock engine at full throttle, that will only allow XX amount of air in per minute.
You can use a bigger diameter MAF, but only if you think that is an issue after engine is up and running, too large a MAF can cause idle issues.
Same with stock injectors, they should be fine, if you are talking about a 10-20% increase in power.
Fuel injectors are not like jets were on a carb.
Jets were fixed fuel meters so had to be changed if you increased the air flow rate, injectors are adjustable, on the fly, fuel meters.
Reply With Quote
  #5  
Old 09-16-2014
pearlkid9988's Avatar
Member
 
Join Date: Dec 2008
Location: Newnan Georgia
Posts: 828
I think 8 psi is what the whipple kits used to run on the 3.0's and they churned out 245hp which doesn't sound like much but when you start with ~145hp at the crank thats pretty impressive with otherwise stock motors so 5psi should be safe.
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1998 5.0 Swap 5 speed swap questions Built Ford Tough 8-Cylinder Tech 1 03-30-2012 05:14 AM
2wd manual Drive Shaft Swap to a 4x4 Drive shaft Swap 2001fordranger Drivetrain Tech 6 03-05-2011 08:06 PM
Fox CoilOver Swap + Rear Shock Swap lateralsvt Suspension Tech 2 04-01-2010 06:20 PM
to swap or not to swap????? 02rangermayhem General Ford Ranger Discussion 0 01-29-2008 11:23 PM
explorer swap 98-01 swap GregsEdge 8-Cylinder Tech 27 11-23-2005 07:48 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -6. The time now is 08:38 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.