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SOHC - 2.3L & 2.5L Lima Engines Discussions and Topics specific to the Lima 4 cylinder engines

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  #1  
Old 07-11-2014
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99 2.5 Tuner

Anyone know any good Tuners to use on the 2.5 Lima engines to increase power and fuel economy that won't break the bank?
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Old 07-11-2014
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The "chips" are a waste of money.

I doubt any software change would be noticeable on a stock 2.5l in any case.

Ford doesn't de-tune engines, they want the best MPG(which is also the lowest emissions) and the most power from every engine.

There is a compromise between power and MPG, that's the Laws of Physics, not Ford, lol.

When you want more power from an engine you add more fuel, simple as that, a "bigger cam" pulls in more air so more fuel can be added.
A turbo charger pushes more air in so more fuel can be added.
Pattern here is "more fuel can be added"

A 5.0l engine doesn't have more power that a 2.5l because it is physically bigger and weights more, it has more power because it can burn more fuel per minute than the 2.5l.

I think there are still some companies around that you can send an EEC-V(computer) to and have them program it for your engine changes, might even be one in Salt Lake; or you can buy a programmer, plan on $600+ for that.




You want to get a few more horse power AND increase MPG a bit, switch to an electric radiator fan, doesn't cost too much and if engine doesn't have to drag that belt driven fan around, HP and MPG BOTH go up.

Also it really helps in cold weather, the Lima 2.x engines bleed heat, many have to cover the front of the rad in winter just to get heater to work, lol.
This is because the belt fan, even if not fully engaged, still circulates cold air around the engine bay, e-fan is just off in cold weather
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Old 07-12-2014
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Second the e-fan one of the first mods i did on my 3.0 and its very noticeable few extra ponies about 10 to 15 miles per tank more. Plus it seems to rev faster which would be good for you since like mine your 4 cyl power band is way up the rpm range peak hp is like 4600rpm so it would help you get there faster and make it feel faster. Again its not a horsepower adder just a horsepower freer. You may also look at a custom header if tuned correctly it can move the power band down the rpm range so you can hit it faster my headers helped with that quite a bit.
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Old 07-12-2014
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RonD, thanks, lot of good info. Ya I was planning on the e fan.

I've heard that living in SLC engines don't get enough O2 because of the elevation. But then I've also heard the stalk air filter was made for a bigger engine anyway, so it doesn't really matter.
So that's the reason I was looking at the tuner, so I could customize the air fuel ratio for this elevation. And I don't want to "upgrade" to one of those bolt on air filters that are supposed to move more air, because I'm pretty sure that just means they filter the air less.
Any ideas?
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Old 07-12-2014
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Stock air systems have been Cold Air Intake(CAI) style since the 1970's, even before on some, so yes, it would be a waste of money to change stock air system for performance reasons, this has been dyno to death, they don't add power period.

Although a good CIA system can "sound" very cool, and if done right you won't lose power, and nothing wrong with spending money on a good "sound" system

Around 1990 Ford switched over to MAF(Mass Air Flow) system.

The way it works is to measure the air flowing into the intake, the information is used by the computer to calculate the amount of fuel needed for the volume of air.
There is also an IAT(intake air temp) sensor, this compensates for cold air which is denser than warm air.

The Ford MAF sensor uses a heated wire, air moving past the heated wire cools it, the more air flowing the cooler.
BUT denser air(sea level) will also cool it more than lighter air(5,000ft).
So the MAF sensor along with the IAT sensor(correcting for actual air temp) compensate for any change in elevation.

The fact you drive at the higher elevation all the time simply means you will have less power than at sea level, that's just the physics of it, not a tuning issue.

Turbos are very popular in Denver(the mile high city) because of the lower air pressure, these give added power, BUT, that same turbo engine would still have more power at sea level, lol.
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Old 07-12-2014
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Any recommendations on efans? RonD?
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Old 07-12-2014
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I have only done the Taurus e-fans and they are often hard to find now.

There are two good reads in this tech section here:
Ford Ranger Heating & Colling Technical Library

The Volvo fan looks interesting and 2 speeds is nice but not required, you can just use it as a 1 speed.

I like the Radiator probe temperature switch, very simple to install.
Summit racing has this one:
http://www.summitracing.com/int/part...3653/overview/

But there are others, the probe fits between the fins in the rad, when the rad heats up to the temp you set, the fan comes on, when temp drops the fan goes off.

The switch above is not to power the fan motor, that is done with a high amp relay, the above type of switch is to turn the relay on and off so low amp side.

If you do 4 wheeling with water crossings then you should install an on/off toggle switch as well, so you can turn off the e-fan in high water, another nice benefit with the e-fan, no water coated engine electrics like with a belt driven fan, lol.
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Old 07-13-2014
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Are the 3.0 and 2.5 cooling systems the same?
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Old 07-13-2014
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??

All "water" cooled internal combustion engines have pretty much the same cooling system, "water" jackets, water pump, thermostat and radiator with pressure cap, some have expansion tanks and others have overflow tanks.

Are the radiators the same, usually not, if that was the question
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