Topic: Alternate Injectors (Read 938 times)

cellulararrest · « **on:** May 02, 2009, 08:14:31 PM »

Has anyone (Matt?, Carey?) figured out a good alternate injector for the 3.9? Or 4.2, 4.6 for that matter. I know you guys up at ECR seem to have found something. I seem to remember them being a Ford part.

Would there be anything gained from putting these in a 3.9 with a 4.2 ECU. I know the RPI chip would be ideal, however the price is sky high.

We're looking at it to possibly try and get some more out of Ethan's range rover as that engine's getting a bit tired. Some weekend we're going to go through all the tricks (timing, TPS adjustment, MAF adjustment) and make sure everything is up to snuff.

whatroad · « **Reply #1 on:** May 03, 2009, 03:33:11 AM »

A company called Five-O. But we only use them when a 4.6 gets "chipped" I believe.
Stock Rover injectors are really horrible, they're lucky if they even "trickle" fuel compared to just about anything else. When Mark Adams was here from the U.K.he showed us the extensive testing he has performed on stock Rover stuff, and they suck.
I'm sure Matt will chime in here as well.

As far as "tweaking" Ethan's motor, I'd start with a completely tuned motor first. So do the tune up and see where you're at. I know a guy back in Pa that has played around with altering the trumpet sizes in the plenum, but I think it's a trade of. You could gain "some" better low end feel, but it tapers and peters out higher up the rpm., and vice -versa depending on how much you cut.

Greatdivide1 · « **Reply #2 on:** May 03, 2009, 07:38:56 AM »

This is what i have learned. Like Carey said the trumpets in the intake is a good place to pickup some throttle responce. I cut mine down one inch and it made a huge diffrence off the line no more hitthe gas....................then go. Its almost spot on touch it and go now. I cranked my timing up also. Knifed edged the intake to the to intake tube. I cleaned the injector plugs. Pulled coolant temp sensor andcleaned it off in the bead blast cabnit.Got a set if cut to length accel 8mil ignition wires. I also did the gm hei ignion module swap. That made a HUGE diffrence in the running of the truck.No more waiting for it to warm up for ten mins before driving now start and go with no bucking coughin or farting. Cleaned out iac. And got a new vaccum module on the sideof the dist. My next thing is a set of ford motorsports 19lbs injectors and pigtails. Then maybe a little more timing. But my truck runns great I have no problems with it lol for now and it has plenty of power.

TightButWillFit · « **Reply #3 on:** May 03, 2009, 10:28:51 AM »

you get the distributer sealed don? lol

Greatdivide1 · « **Reply #4 on:** May 03, 2009, 02:55:08 PM »

Lol no not yet lazy and busy lol

junkyddog11 · « **Reply #5 on:** May 03, 2009, 05:44:16 PM »

Quote from: cellulararrest;17335

We're looking at it to possibly try and get some more out of Ethan's range rover as that engine's getting a bit tired.

tough to get a bit more out of a tired motor. You can use Ford injectors, probably in the 19lb range, but doubt that they will do much on thier own. The Bosch fuel injectors work well with a stock motor but are expensive to replace. You can get them cleaned which will help.

Gt3454 · « **Reply #6 on:** May 03, 2009, 09:06:31 PM »

Is there any benefit to putting those into a D2?

whatroad · « **Reply #7 on:** May 03, 2009, 10:04:42 PM »

I don't think so. The Bosch system in D2's is actually pretty decent. Let's face it, you can put lipstick on a pig, but it's still a pig. There's no replacement for displacement, period.

cellulararrest · « **Reply #8 on:** May 03, 2009, 11:57:59 PM »

Quote from: junkyddog11;17353

tough to get a bit more out of a tired motor. You can use Ford injectors, probably in the 19lb range, but doubt that they will do much on thier own. The Bosch fuel injectors work well with a stock motor but are expensive to replace. You can get them cleaned which will help.

Well if you were to replace (or clean) the injectors, would you recommend just not bothering and going with the Ford injectors? What's the price difference? If it were to be chipped later on down the line then you could put them to use, no?

Maybe tired was the wrong word. It's at 130-140k right now I believe? It's just a bit gunked up at the moment. I'm sure it still has plenty of life in it. Hard to tell until we start getting into it deeper.

Quote

Like Carey said the trumpets in the intake is a good place to pickup some throttle responce. I cut mine down one inch and it made a huge diffrence off the line no more hitthe gas....................then go. Its almost spot on touch it and go now.

Ethan mentioned that as well. Maybe a good thing to look into once we get it all tuned up. I have no doubt your brain will be picked for that one.

Thanks for the input guys. It always helps to hear it from people who've done it before. I personally like to get the most out of the rover setup as I can.

Follow up post:

Found this post, Matt: http://www.d-90.com/forum/showpost.php?p=117576&postcount=15

Any reason your opinion may have changed? Is this specific to the GEMS system? I know it has much more control and may be more adaptive than the 14CU system.

junkyddog11 · « **Reply #9 on:** May 04, 2009, 06:56:59 AM »

opinion hasn't changed. If buying new injectors, go for the Ford as they are a much better price. What I meant was that just throwing a better injector in what was described as a tired motor (which at 130-140k it is probably in need of a top end freshen up) will probably not yeild the results one might hope for.

The stock Bosch injectors, in good shape, work very well. I wouldn't pay for new ones though.

cellulararrest · « **Reply #10 on:** May 04, 2009, 09:36:32 AM »

Understood. Thanks.

junkyddog11 · « **Reply #11 on:** May 04, 2009, 08:49:08 PM »

you're still smiling right?.....

cellulararrest · « **Reply #12 on:** May 04, 2009, 09:07:02 PM »

Of course! I love being able to pick the master's brains!

I'm now wondering what it takes to hack the ECU chip...

Sure would be nice to produce my own.

junkyddog11 · « **Reply #13 on:** May 04, 2009, 09:25:50 PM »

That's a tough one, and the chip is not by any means a bolt on. it still needs to be tuned, and you need a good motor to be able to get the full benefit. It took quite a bit of development and I'm fairly sure they, Mark Adams (Tornado systems), Chris Crane (RPI), John Earles (JE Engineering) have it fairly well protected.

whatroad · « **Reply #14 on:** May 04, 2009, 09:36:19 PM »

I'm not sure I'm following. According to Mark Adams(I asked him personally), there is no difference in swapping in the ECU from a 4.2. I take what he says rather seriously, because when he was here, the amount of time and knowledge that man has about these systems is "loco." Now, I'm all up for learning something new everyday, and by NO means am I a "Mark Adams". So, I'd be up for some input.

Author Topic: Alternate Injectors (Read 938 times)