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(Post Link) post #1 of 10 Old 12-08-16 Thread Starter
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injectors. need more flow for project...

Righty, project is coming along slowly and research is continuing abound.
so, it looks like I need bigger injectors. I don't want to run a separate ecu and injector, I want to man up the ones on board and get them running right.
I have questions that people in the know may be able to help on.
Are the oem injectors a certain type? Do they have a series type that there are different volumes of? Ones that will fit without mods?
Will the ecu be able to retune or (likely) is it going to need a retune/map?
My heads hurting!!
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As I learned that you have a twinspark petrol engine right? So there should be lots of injectors out there, because it is petrol engine. not like ours diesel engine. We could only find 341 series injectors for our 1.9Jtdm engines if we are lucky and have lots of money left from mods
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Quote:
Originally Posted by Egon View Post
Righty, project is coming along slowly and research is continuing abound.
so, it looks like I need bigger injectors. I don't want to run a separate ecu and injector, I want to man up the ones on board and get them running right.
I have questions that people in the know may be able to help on.
Are the oem injectors a certain type? Do they have a series type that there are different volumes of? Ones that will fit without mods?
Will the ecu be able to retune or (likely) is it going to need a retune/map?
My heads hurting!!
your choice is to go higher fuel pressure (doubling fuel pressure gives about 1.41 times more fuel injected) or go with bigger volume injectors, or both.

Which injectors do you have now? You could get injectors from a 3.0V6 for a bit more flow. My advice is to not go bigger than you need or you run the risk of poor idle emmisions. So how much power will the engine make?
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(Post Link) post #4 of 10 Old 13-08-16 Thread Starter
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I have standard 1.6 injectors which run at 19lbs hour, I'm looking for 170hp on 5-6psi boost, so around 24-25lsb/hr.
I don't know enough about the fuel pump and how to modify its pressure, so I'm looking at bigger injectors.
I found a table on a g40 polo site that pointed me at some mondeo mk3 1800cc injectors.
I'll see if I can find it and post a link. Really rather handy.
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are those the yellow/black injectors?

Anyway, 24 lbs might be low for a turbocharged engine, remember you want to run rich at full power under boost. And do you really want to run 100% duty cycle? I'd go up a wee bit.

Last edited by Cuore_Sportivo_155; 13-08-16 at 08:03.
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right, first things first: determine the body style for the injectors (length is of importance)

EV14 ? RMA Performance

the standard injectors could be EV1 or EV6, I suspect EV1. You can substitute for EV6 but might need to change the plugs on the wiring. Just cut some of at a junkyard.

Here's a list of injectors and their flow rates, and their applications. Stick to Bosch injectors, high impedance. Low impedance injectors will burn out in a high impedance application.

Stan Weiss' - Electronic Fuel Injector (EFI) Flow Data Table

I'd look for 26-27 lbs/hr.

Did you consider lowering the CR so you can run a bit more boost?
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(Post Link) post #7 of 10 Old 13-08-16 Thread Starter
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i'd based it on 80% max duty. Maybe my numbers were off? Hmm. I'd love to build a monster and i may do if this one goes ok. and my wife hasnt divorced me.
oem is:0280150759 246cc 14.5ohm

i think i just bought the wrong ones. dammit. :\

https://www.polog40.co.uk/article_injector_table.php
polo page is useful.
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Quote:
Originally Posted by Egon View Post
oem is:0280150759 246cc 14.5ohm
OEM for what car? 246cc is quite high flow

The OEM for the older metal injector rail is EV1 style and for the plastic injector rail it is EV6 style. If you have the EV1 style, EV6 style does but is 3mm shorter, so you'll have to trim the stand-offs a bit down:

https://www.alfaowner.com/Forum/south...l#post14437617

https://www.alfaowner.com/Forum/attac...1&d=1456824610

Following the stan weiss injector sheet you'll find the metal rail 2.0L injectors are
model: 0-280-150-702 lb/hr: 18.0 cc/min: 189.2
The 3.2 V6 is EV6 style:
model: 0-280-156-038 lb/hr: 21.3 cc/min: 224.4
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Hmm, I was using info from a search. Maybe I got it wrong. 1.6 16v cf3 has plastic everywhere...
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Audi 1.8T 30.15lb/hr 316.9cc/min is perfect for you.
http://www.ebay.co.uk/itm/4X-GENUINE...EAAOSwVcFXO2X6

Other option would be Volvo T4 / T5 / T6: 31.8lb/hr 334.2cc/min
http://www.ebay.co.uk/itm/Volvo-C70-...AAAOSwq7JT-kqe
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