Injectors

[FlyingFatass]

I read up on how switching to the ford 5.0 19lb injectors will add a good 15-20 HP.

http://www.cadvision.com/blanchas/Ranger/efi.html

It states to use the 4 hole injectors rather than the needle ones. I'm not too familiar with injectors, but from what I can tell, these are what I'm looking for. But just to double check

http://cgi.ebay.com/ebaymotors/Set-...cessories&hash=item41551d934c#ht_11315wt_1282

These are the right injectors?

Also just wondering, whats the proper technique to clean the MAF? I'm going to do that as well.

 

[scotts90ranger]

flowing more fuel doesn't mean more power, the cylinder head is the choking point, they can't get enough air.

 

[FlyingFatass]

flowing more fuel doesn't mean more power, the cylinder head is the choking point, they can't get enough air.

What would your suggestion be for getting more air in? I don't really want to turbo if i don't have to, but what would be more cost effective?

 

[scotts90ranger]

get another head, either do a lot of reading on the best way to port them yourself or have someone else do it, then take a weekend and swap it on, it should learn how much fuel to give it with the oxygen sensor (and MAF if yours is new enough)

 

[FlyingFatass]

Did a little research (http://www.angelfire.com/pa3/lyzcoinc/CylinderHead.html) and found out that porting the head is quite an extensive process. I do happen to have a junkyard with a plentiful amount of old rangers in there. I'm bound to find a doner 2.3 head to do the work on. I do have a few questions though (Keep in mind I'm still learning a lot about engines, so some of these would be noob questions)

I states that I should probably replace all the gaskets and seals, which is pretty much a given, but it also says I should get new valve springs, valve lifters, valve keepers, and even new valves too. Is it that necessary to replace all of those? I would think getting new springs would be good, but lifters, keepers, and valves might be going a bit too far (I'm on a college budget, so trying to cut as much expenses as possible), I was hoping i could use the ones from my engine, or from the doner head.

Where would I find somewhere to "bake" the head?

Should I expect any change in my redline?

How much of a power increase would i be looking at with a ported head, coupled with those 19lb injectors?

 

[FlyingFatass]

Also, what about shaving the head down? Besides more compression, would I gain any power that way?

 

[scotts90ranger]

don't shave the head, without an adjustable cam pulley it makes things a pain, doesn't help these things.

I suggest changing the lash adjusters while you are there (about $65 for all of them) and maybe the valve springs and of course the valve stem seals, other than that you would just need a head gasket and intake gaskets and of course a new timing belt while you are there. The head bolts are torque to yield, so you'll need a set of those

There's a reason I mentioned using a junkyard head, leave the truck together so you can get around, this way you can gather parts as money allows

I believe an '89-93 or '94 head should work just fine for what you need

I don't believe you'll need the larger injectors, someone else might chime in otherwise, but the computer would just learn the fuel back out of it, most likely not necessary. Realize that to keep the valves from melting at higher speeds and loads the injectors are sized to give the engine plenty of fuel, normal air fuel ratio is 14.7:1 to keep the catalyst happy for good emissions, at full power and high speed (above say 3000rpm at near full load) the exhaust temperature starts to get hot, with gasoline you can just add more fuel to cool it off, at max speed this ends up being about 11:1 AFR, the stock injectors can handle that plus some to have a safety factor. In short, the stock injectors should be sufficient, don't believe everything you read on random websites like the first one you listed, I've seen it before...

the rev limit in the computer is around 6000rpm, so that won't change, the power peak will still be around 450rpm so increasing the rev limit won't help.

 

[FlyingFatass]

Well I've been seeing a lot of stuff on what I need to port out the head, what things to replace, and what kind of power gain I could hope for, but the actual process of porting, how would I go about doing this? Do i just try to retain the same shape as the current chambers, just expand them slightly, or is there a certain technique I must stick to?

I'm also really interested in running a turbo as well (low boost of course...don't want to buy forged pistons.......yet...), just for the extra 20 - 30HP. If i can find a full 2.3T from an SVO or turbo coupe, I'll definitely just pull that and swap it, but realistically thinking, I'll probably only be able to get a hold of just the turbo. Given that I ported the head, would the process of turboing the 2.3 still be the same, and could i still run the same amount of boost?