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Any news Bart ?
Injection update!
The fuel pressure regulator is mounted. And i got an opel performance air horn.
On the back i put the (peugeot) fast-idle solenoid and the coolant thing which goes with the solenoid. That thing contains also the water temperature sensor. The air temperature sensor will be placed in the air horn. The 2 blue fitting are for the brake booster and pop-up headlights.
Here's the fuel rail, made from 12mm copper waterline. The 12mm sockets is the right size to make 1/4" thread in it, so i can easily make fittings for the bosses and hoses.
Amazingly it fits! (well, just little clearance from the alternator)
Note the throttle lever, which costs me some headache. And note the fuel pump, fixed with cable-ties, where the coolant tank used to be.
A volvo throttle position sensor is bodged in position.
Note the neat wiring
(Hey, thats my profession
)
Now it's time to get it started and tuned.
It starts the first time! That's very promissing..... not.
It idles very rough. I have to inject lots of fuel to keep it from stalling. Hmmm.
But when i blib the throttle, it sound very promissing! I even made a short testdrive and i was impressed. I spent a few days trying to get the idle right, but without succes.
Tuning an ecu from scratch is done step by step. Don't start the next step before the current step is ready. Step number one: Get the engine started. Step 2: get the idle right. So no use to continue if i don't get the idle right.
Spending some evenings on several forums learned me, that the way i put the injectors won't work. The injectors are spraying a big part of the fuel against the inner walls of the manifold. The injectors are BIG (680cc/min) so lots of it are dripping on the walls.
And at idle there is very little air movement in the manifold, so the fuel is sprayed in almost stationairy air. And the air movement is also going in two directions. It goes down at the intake-stroke, but when the other "cilinder" is doing the intake, it is causing the air movement to go up a little.
The best place to put the injectors is as close to the intake as possible. So it sprays directly in the intake ports.
But on the other hand, i know some cars which have the same manifold as i have, but with a DCOE throttlebody. With such a set-up you have the injectors even further away than i have.
I don't understand why a dcoe throttlebody will work, and what i made won't.
So it's back to carb.
Which is a shame, spending so much time and money to it.
What's next? Skip injection? Improve carb? Improve exhaust?
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