19lb injectors in 97 with 2.5.

[5speedin2.3]

I have red 14lb injectors now.
Would it hurt to put in the 19's?
I was reading on a random website that you can drill out to opening for the MAF to correct a/f ratio.

 

[scotts90ranger]

you don't get more power by just throwing in more fuel, that website is full of lots of false information if it's the one I'm thinking it is... For more fuel to make more power you have to add more air also, and the only two ways to do that on a 2.3 are porting the cylinder head, or adding a turbo...

 

[Rockstar04]

And by drilling on your MAF, you have no idea how much you are taking or adding airflow wise, and causing who knows what for other issues, if you are going to swap injectors you need something to tune them with, if you just swapping injectors, the minimum would be a AFC, best bet would be a megasquirt board and a wideband.

 

[5speedin2.3]

This is the website I was talking about.
http://www.hotrodhigh.ca/Selection.html

 

[Rockstar04]

Almost everything on that page is flat out false.

Fuel in DOES NOT equal power out.

I am not trying to yell at you, but i just want to make sure everyone sees that.

To PROPERLY change fuel injectors, you need to be able to change some very specific tables in the PCM to get them to work correctly. These tables include the injector flow rate, low pulse offset or adder, voltage scaling, and several other parameters depending on how much data from your injector MFG you have.

Here is a link to the tables my injector supplier gave me for my 100Lb/Hr injectors I am running in my Bonneville. With that data written to the PCM in my car I noticed ZERO difference in the way the can started, idled, drove or anything else. Those injectors are 3 times the size of the factory injectors.

If you have a way to log your injector DTC's and have numbers above 90%, then you need new, larger injectors, otherwise putting in bigger injectors will just make your truck run rich. Drilling on a MAF and otherwise hacking them up has a whole set of negatives that are a little outside the scope if this topic.

 

[Gotta_gofast]

hot rod high? I had to read it lol. Wonder what his results would have been had he run some 83 pounders?

 

[The purple one]

He also said he did other work to the intake. But did not say what he did to it. If it were that easy people would have ben doing this for years and it would be all over the net.

 

[scotts90ranger]

I'm sending an email to the webmaster, see if I can get him to remove the misinformation... will try to share his reaction...

 

[Rockstar04]

I'm sending an email to the webmaster, see if I can get him to remove the misinformation... will try to share his reaction...

+ Rep'd

 

[scotts90ranger]

Here's his reply:

I don't believe that I have posted any misinformation. About 95% of the
modification that are listed has been personally tested by myself. The
one or two mods which I haven't personally performed are credited to the
contributors.

On my webpages, I discuss increasing the fuel injectors from 14 lb to 17
lb according to the Accel data sheets - I think that they know more than
both you and I together.

On my 2.3l, I did extensive mods to increase the air flow to both the
intake and to the exhaust system compared to the stock 2.3l engine. This
allowed me to increase the fuel injectors to the max of 19 lb and it ran
successfully and there was a measurable performance increase in my real
world testing. I have many emails confirming this mod with comparable
performance increases. On my website, it is clearly noted that "There is
about a 10% increase in hp (10 hp)". NO place do I make claims of
radical hp increases. If you read through the countless pages, you'll
see that time and time again, I state that it is a combination of small
mods that add up. Unfortunately not to big hp gains but at least to
making the truck a fun truck to drive.

I also list a method of calibrating the MAF to the new fuel injectors.
This made a huge difference. On the MAF page, it states to modify a
junkyard MAF and test it there first. If people are dumb enough to throw
in monster injectors, modify their MAF and expect tons of hp from a
normally aspirated 2.3L then that's their problem. More business for
guys like yourself to clean up the mess.

As for the throttle body spacer, I agree with you except that I have
received many emails from 2.3L owners who disagree and state that there
is a performance increase. I can't verify it and on the webpages, I
attribute the content to CK who provided me with the photos and
information. I know that in designing intake manifolds that the size of
the plenum in relation to the runners will change the hp curve. Adding a
throttle body spacer will increase the plenum size and correspondingly
affect when the peak torque and hp arrive. Considering the lethargic
performance of the 2.3L, it may move the curve 100-150 rpm in the right
direction into a more usable rpm range.

I had been modifying my daily driver 2.3L for over 6 years and the
website documents what worked for me. I took my lethargic 2.3L and made
it into a reasonably fast normally aspirated truck which is what Ford
should of released. Not going to win a drag race but it was a fun truck
to drive.

You state that "The 2.3 is limited in air flow by the cylinder head and
nothing else." That is not quite true when you start with a stock
engine/vehicle. There's a number of things that are listed on my website
that will increase air flow up until the point when the air flow becomes
restricted by the cylinder head design. At the end of its life, my 2.3L
had comparable performance to a 2.8L V6.

I am a member of theRangerStation.com and did regularly read it and
contribute for a number of years.

BTW I gave my Ranger to my nephew last year who is putting in a turbo
2.3l.

Hard set in his ways... will reply here shortly, and reiterate the false statement that bigger injectors themselves mean more power. Still not sure where he's getting his "10% increase in power", I haven't seen a dyno sheet or mention of dyno testing or even changes in 1/4 mile time...

 

[4b316]

Scott,I usually don't diagree with you but with this I have to.I have to say one of the improvements to our race truck is to go from 14 to 19 and even 21 lbs.The only thing the engine has done to it is bored,stock pistons and the head wacked.Stock cam,stock porting.We are cramming a lot of air in it at speeds with a full ram air system.If you do a fuel injector requirement sheet calculator,you will see even at the old 90 horse ranger need 14.07 lbs of injectors at 43 lbs.If you have a 115 hp 2.5,that number jumps up to a needed 17.03 lbs of injection.We have talked to Accel,RCI and 5.0 Motorsports and they all said the same thing,14lb injectors are fine for the street,never seeing over 4500 rpm,s with no improvements to the motor.14 lb injectors at 5800 rpm,s are marginal at best.We have seen a improvement of almost .14 a lap time with just a change from gray to yellow injector,in fact since the tech guy has found this,the track made a new rule that we couldn't change injectors.I agree,on the street with a stock motor it is a waste of time but with even some minor improvements and given on how plentiful 19lb injectors are,why not put them in,it isn't going to hurt a thing

 

[Gotta_gofast]

Basically, fuel injectors are a supporting mod. They are designed to supply adequate fuel to your engine. Just as a fuel pump is a supporting mod. So the only way you would "see" a performance increase in larger injectors is if the current injectors are not supplying enough fuel (or dirty/clogged and in need of replacement anyway).

 

[Rockstar04]

it isn't going to hurt a thing

That is flat out false.

Without proper tuning (AKA Computer flash, not hacking a MAF) and loggin equipment (Wideband and a gauge at minimum) you WILL hurt performance because you have no idea what your true AFR is.

Plus swapping injectors without changing other things like IDC and the LPA you are opening a whole can of worm as far as idle and part throttle response is concerned.

 

[scotts90ranger]

in that case I do stand corrected... I didn't realize that they were on the edge... I was going on the assumption that they were sized appropriately for the designed engine speed range. Going to 19lb injectors is a 35% increase in fuel flow, depending on the fuel adapt capability of the computer that really shouldn't be a huge issue, the closed loop system should be able to take that into account. I know the diagnostics on the engines I calibrate are set up to set a code at 20% either way and will stop at 25% but on a '90's engine I can imagine that being further out. I imagine the idle lowering that is on the hotrodhigh website is from excess fuel that can't be adapted out, probably a little too far to adapt at that low of fuel flow.

I guess I owe Eugene an apology... It did get some things out though, I learned some things about the 2.3L and thought a bit deeper about what is going on.

 

[94 lngbd]

I know that the 19 lb injectors are found in mustang's 5.0, but what years are covered & color are the injectors