rusnak

What is the part number? Same fuel pressure, and did you check with a wideband O2 sensor to see if it's still operating at lambda +/- 1.02?

stlrj

Bosch PN 0-280-155-784 (same flow rate as stock and I've tried a bunch) seems to be a perfect drop in with no modifications to fuel pressure. I'm still using the stock 02 sensor...nothing fancy and it easily passes smog.

Cheers,

Joe

oldskewel

As a scientist, I really like this response. Opinions and suggestions can be helpful, but a carefully aimed experiment with quantitative results is tough to argue with.

And (opinion warning) I would be reluctant to modify an engine as nice as the one you've already got, especially since the performance improvements are "known" to be limited. Exhaust, chip, injectors, no problem. But beyond that, it does not sound like you're starting out with a project car ripe for major surgery.

Amber Gramps

I have a good friend in the fuel injector business who cleaned and balanced my injectors within 1% of each other who was so impressed with the nozzle pattern that we gave up looking for 4 nozzle alternatives. I'd love to find injectors that were 4 nozzle that would run at the low impedance of yesteryear.

stlrj

Even though high impedance they have a higher response rate than the earlier low impedance EV1 injectors.

This might be of interest too:

http://www.ausjeepoffroad.com/forum/...ad.php?t=92236

Amber Gramps

So is the injector listed above the one to get?

We made a similar injector switch in my Ford E350 and along with new lifters and high output coilpacks turned a tired old modular engine into a monster that is stronger than it was new, some 15 years ago.

stlrj

...784 is the one I am using.

Amber Gramps

Does it require a jumper or adapter or is the electrical plug and play?

Will have to ask my buddy Gonzo if he's got 'em...

https://inlandempire.craigslist.org/pts/5949868038.html

OK, Gonzo is on it and will get back to me in the morning. He thinks he has them but he's at home at this hour. He questions the plug though. Will see....

stlrj

EV6 to EV1 USCAR adapters are required.

Amber Gramps

Ok, Gonzo said he would check in the morning for stock and loan me a full set of injectors and adaptors so I could run them on the butt dyno before I shelled out any money.

He said he also has a 703 that looks to be a direct fit and flow match. Interesting stuff.

Railmaster.

Do You really NEED more power or do You just WANT it?!
Fit a sports exhaust and lose a few inches around Your waist if possible, that will make a huge difference!

Adams

Hope I'm not confusing the issue, but this is a thread at that 'other' forum about a 4 hole injectors that also uses/requires a different chip, which are said to be matched accordingly for better overall performance. Very interested in this topic:

http://forums.pelicanparts.com/porsc...l-carrera.html

porsche0nut

What's the difference?

porsche0nut

I'm going to email Steve Wong about his thoughts on it. I have his chip and am very happy with it. Wonder if he has reprogrammed his chips for different injector styles.

If I were to go down the modernized injector route, I would want it to be plug 'n play and not REQUIRE a chip reprogram. If Steve can reprogram my existing chip to better make use of a modern injector, that's awesome. But telling me I HAVE to reprogram with HIS setup turns me away from the product in the posted link.

Amber Gramps

Not to disrespect Sal, but injectors are easily pulled from a junkyard for about $4.50 EA. When I did my van the first time I pulled injectors from several other 5.4L at Pick-A-Part and had Gonzo put together the 8 that were all within 2% of each other.

A word on simply cleaning your stock injectors. Sure, run Techron, but you may need more. I had mine cleaned and wow what a change across the entire map. My gas milage dropped significantly (in other words they were seriously clogged), my opporating temp dropped noticably, and my throttle response is crisp and instantaneous. It's a must do on 30 year old injectors.

.....And I have a Multi-board chip with four map choices so I'll play with the maps I have.