Garage Storage Organization and Garage Cabinets

RoadWarrior222 · **Injectors....**

Hi Folks,

I dug out the previous discussion on injectors in this section and didn't really get what I wanted out of it. I'm working with an '88 3.0 in a Voyager, I think I've also got an '89 fuel rail in a box somewhere, and an '89 lower intake.

What I'm aiming for is better atomisation and maybe a touch more fuel than stock, i.e. a few percent, not like 30%

So, here's the "facts" I think I'm working with. Stock system is regulated at 48psi, low impedance 19-20lb injectors. That's right huh?

Here's what I want to know. Is the injection system voltage controlled in these? Meaning can one possibly take out the ballast resistors and run high impedance injectors?

What fittings are the injectors, thread etc? Some other sites seem to suggest ford/bosch injectors fit, but people here don't seem so sure.

What I'm thinking I'd like to get to work, are the Ford 19lb injectors that are stock on a lot of mustangs, because they're the 4 pintle type giving a good spray pattern, are reputed to be reliable and may flow a touch more than our stock injectors (Due to being rated at lower PSI). Also they're often available real cheap.

So can anyone tell me if I'm likely to get those to fit in either the '88 setup or the '89 parts I've got.

If those are a definite no-go, then what cheapish equivalents might I find that give a good spray, and aren't much bigger than stock. I'm thinking the 27lb ones will be too big for me.

This is for a rebuild/buildup that I hope will happen before Xmas, just getting my ducks lined up and allowing myself lots of time to collect parts as cheap as possible.

thanks,

Road Warrior

NA2ndgen · 09-09-2006, 01:36 PM

Quote:

Originally Posted by RoadWarrior222

Hi Folks,

... and an '89 lower intake.

Go with a 92 or later lower intake. They are slightly larger than the older ones.

Quote:

Originally Posted by RoadWarrior222

What fittings are the injectors, thread etc?

There are no threads. They are push in o-ring fittings.

Quote:

Originally Posted by RoadWarrior222

What I'm thinking I'd like to get to work, are the Ford 19lb injectors that are stock on a lot of mustangs, because they're the 4 pintle type giving a good spray pattern, are reputed to be reliable and may flow a touch more than our stock injectors (Due to being rated at lower PSI). Also they're often available real cheap.

So can anyone tell me if I'm likely to get those to fit in either the '88 setup or the '89 parts I've got.

I believe they are the same as ours, and so yes they will fit. I don't know if the spray pattern is any different, but I doubt it.

Avenger · 09-09-2006, 01:51 PM

I'm pretty sure the Ford 19lbs'ers are exactly the same as ours. I've got to go to Autozone this afternoon anyway, I'll check P/Ns for their replacement parts.

Boogieman142 · 09-09-2006, 05:19 PM

they are the same, the other thread i started was for a mitsu lower, not the chrysler ones ford and chrysler like to use the same external size of the injectors and resistance.

Jetson8294 · 09-09-2006, 05:25 PM

Sorry for the hijacking... but does anyone know if the stealth TT motor has low or high impeidence.. its a 91 stealth

RoadWarrior222 · 09-09-2006, 05:45 PM

See this for Stealth injection details...
http://www.stealth316.com/2-injectortypes.htm

Avenger · 09-09-2006, 06:19 PM

Advance lists no fewer than 3 different P/Ns for the Ford, one of which is the same number as for the 93 P-body.

RoadWarrior222 · 09-09-2006, 07:28 PM

Thanks Avenger, yeah by '93 they were on high impedance I think, and '87 might have had different injectors (Lower fuel pressure apparently) So probably means ford/bosch "Stage III" injectors are a direct swap in for later high impedance 3.0s.

Thanks for clarifying that Boogieman, easy to get confused between mitsu installed spec, chrysler installed spec, hyundai installed spec, etc.

I'm looking at this page...
http://www.geocities.com/phatfoto/EEK6G72.html

Which says only 2 types of lower manifolds were installed. Well, I'm sure the '88 one is an '88 one, but the '89 could be any year I guess, got a mixed lot of parts from a guy who had an 89 and some were parts off his 89 and some were spares he got for it, so could be any year, anyhoo, the spare one I've got has the PCV connector on it, and is different from the 88 one. The spare fuel rail I've got looks a bit different too, but I dunno if it's the SMPFI on, but I hear I should be using the 88 one anyway for best flow (Not that I'm trying to max it)

That page is confusing though, I heard somewhere else roller cams were 91 not 90.

So, so far, ford injectors fit, later lower manifold flows better, earlier fuel rail flows better...

So I'm thinking I just need to find out about the injector driver and whether there's any resistances I can remove to be able to run high impedance on the '88. Might be messing around with something to speed up closing time, might not. I'll eventually have something like a "second guess" injector control system, that will sometimes override the ECU and suppress or enhance injector pulse duration. Haynes manual is bloody useless as always, got a wiring diagram that is undated and appears to show a later SMPFI circuit, since the injectors appear to be driven independantly. No mention of differences in it either.

NA2ndgen · 09-12-2006, 10:16 AM

Oh crap.

I should have known it wasn't that easy after getting the sandwich adapter. I hope you guys wont mind me asking this. Is it likely the OE injectors on my 1995 3.0L are worn enough to merit replacement? Would I get better performance with new injectors of a certain type on my NA setup?

mwinkle353 · 09-12-2006, 04:51 PM

are you running lean? If not, then don't worry about replacing them. I'd just run a few tankfulls of injector cleaner a few times a year to keep them from gumming up.

NA2ndgen · 09-12-2006, 08:56 PM

Thanks Wink.

mwinkle353 · 09-12-2006, 09:07 PM

No worries. Just doesn't make sense to "throw" money at a car that doesn't need it. Unless it's to say you have "sucha-sucha" part installed. And to me, that's just being a ricer.

NA2ndgen · 09-12-2006, 09:32 PM

Quote:

Originally Posted by mwinkle353

No worries. Just doesn't make sense to "throw" money at a car that doesn't need it. Unless it's to say you have "sucha-sucha" part installed. And to me, that's just being a ricer.

I agree. If there is no real improvement, or power gain, then it is just silly. Or ricey if you will.

mwinkle353 · 09-13-2006, 04:36 PM

Honestly, the best fuel modification for a N/A application is an adjustable fuel regulator. If you do get lean, after some heavy modifications, you just crank up the fuel pressure a bit to even things out. But the PCM's Fuel Adapt range is fairly wide on our cars. And it'll take alot in order to surpass it's capability. Best thing to do is get your hands on a diagnostic scanner that reads the PCM's fuel adapt percentages. Then you can take your car for a drive and adjust your Adapt percentage adjustment as close to 0% as you can.

NA2ndgen · 09-13-2006, 04:40 PM

Quote:

Originally Posted by mwinkle353

Honestly, the best fuel modification for a N/A application is an adjustable fuel regulator. If you do get lean, after some heavy modifications, you just crank up the fuel pressure a bit to even things out.

What soft of mods? I am guessing ported heads and a 60mm TB would do it.