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Hello, please don´t you know the minimum values of EU injector 0280150252 to work well, I have tested them - 12ms/600 speed (9-10ml), 36ms/1666 speed (60-65ml),static 118-123ml. The engine hesitate especialy between 1500 - 2500 rpm and ewerithing is new except for the injectors.
Hi John, yes it is, all sensors, ingnation cabels, sparks, compresion measured etc. even we changed control unit from another car, The injectors was cleaned with ultrasonic cleanerand and tested, but only the injectors was not replaced from another car and I can not find any details of value of injectors to work right on internet and in Porsche manual.
If you unplug the MAF and force the LH ECU into limp home mode, then the following from my website gives approximate injector opening times :-
Q - What is the "limp home" programme ?
A - This is a programme within the LH brain, which allows you to drive the car home or to a workshop, even if the MAF fails. It gives two pre-set fuel injector opening times- 3.5milliseconds when the engine speed is less than 2000rpm, and 6.3mS. when the engine speed is greater than 2000rpm. Because this is a crude approximation to the constantly variable correct injector settings, the mixture will only be correct at two points. At other throttle openings the car will run rich or lean, but it's good enough to drive the car with care.
Originally Posted by Porsche928EU
Hi John, yes it is, all sensors, ingnation cabels, sparks, compresion measured etc. even we changed control unit from another car, The injectors was cleaned with ultrasonic cleanerand and tested, but only the injectors was not replaced from another car and I can not find any details of value of injectors to work right on internet and in Porsche manual.
Trying to learn and make notes on all of this and record the proper part numbers so I can be on the lookout for good deals on spare parts for my M28-22 84 Euro S Twin Dizzy
Here's what I've gathered so far from the threads you experts have contributed to LH Euro Brain - either will work 928 618 123 00 (lower clock speed) 928 618 123 02 (supports SharkTuning)
US versions will NOT (928.618.123.04)
Fuel Injectors
928.606.119.00 (Bosch 0280.150.252)
928.606.119.02 (Bosch 0280.150.730) are the later 4 hole injectors that may work
If I were to swap my LH brain to an 02 version, someone with a SharkTuner would be able to tune my 84 for optimal performance? What would that change from the way it runs on the 00 box today?
What is the flow rate of the proper 00 fuel injector for my car?
Can it use the later 02 style 4-hole 19 lb injectors or is that the wrong fuel rating and it's not possible for the 00 LH to adjust the fueling into the correct range.
If the 00 LH can't, can the 02 LH and can it do it by default or would it need SharkTuning to be right?
There are some 24 lb 12-hole injectors out there, but they require a fuel rail mod. If my original 00 injectors were 24 lb, I assume I could swap these in with the fuel rail mod and get better fuel atomization for combustion, right? If my original 00 injectors are 19 lb can either the 00 or 02 LH brain adjust to make these work properly.
The car runs very well, but if there's untapped potential from some fairly simple part swaps, why not realize it.
As you may recall, I converted my L-Jet 81 to LH / EZF from an 85 EuroS so I could Sharktune it.
If I were to swap my LH brain to an 02 version, someone with a SharkTuner would be able to tune my 84 for optimal performance? What would that change from the way it runs on the 00 box today?
You'll need a ST1 and a shop willing to work with older tech. The issue is time, you cannot tune both computers at the same time and you're burning a chip in-between runs. Tune LH, burn chip, tune EZF, burn chip, back to LH to verify air / fuel with new timing. It's not a big deal but dyno time costs money.
Road Trip to Green Bay? My tuner has done a few of these, including the tune for the 85/86 Murf928 Supercharger kit.
If everything is working good on your car now, I doubt you'll notice any difference. I actually swapped in a US 86.5 brains into my car and it started up and ran fine.
What is the flow rate of the proper 00 fuel injector for my car?
24lb
Can it use the later 02 style 4-hole 19 lb injectors or is that the wrong fuel rating and it's not possible for the 00 LH to adjust the fueling into the correct range.
I would stick to 24lb injectors. I have 42lb 4-hold Bosh injectors in my 81.
If the 00 LH can't, can the 02 LH and can it do it by default or would it need SharkTuning to be right?
You would need to adjust at least the injectors size in the ST if you go down to 19lb injectors
There are some 24 lb 12-hole injectors out there, but they require a fuel rail mod. If my original 00 injectors were 24 lb, I assume I could swap these in with the fuel rail mod and get better fuel atomization for combustion, right? If my original 00 injectors are 19 lb can either the 00 or 02 LH brain adjust to make these work properly.The car runs very well, but if there's untapped potential from some fairly simple part swaps, why not realize it.
@BC is selling a set of 32V fuel rails I had modified to work with the 16V intake manifold. I made 5 sets and had them zinc plated. Turbo Todd moved two fittings to work better for fuel line routing around the distributor and intake.
Personally I would at get a 4-hole set for better atomization. I've seen mixed opinions on going with more holes then that having any benefit. In tuning circles, it's like like asking what oil to run.
I'm sure @ROG100 has a 24lb Bosch injector he could recommend.
I'd rope in @jcorenman for further specifics on the Sharktuning questions.
__________________
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission? George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Eric, this is awesome. Thanks. The modified rails BC has would hold newer 24 lb injectors without the adapters and work with my 16v heads.
Yup, just need to make sure you have the correct O-Ring. The fuel hose routing will be different. I used Parker push lock fittings to make new fuel lines: https://ph.parker.com/us/en/82-series/3ca82-10-6
Originally Posted by Petza914
The 12 hole injectors I was thinking about were the ones in this thread and have a 24 lb rating.
07-26-2018, 05:57 AM
George Layton March 2014