Increasing fuel pressure

A2Steve

A2Steve

A2OC Donor
Wales
Looking for some advice from the collective knowledge.

The turbo FSI is running well, but it’s suffering with what feels like fuel starvation on higher speeds and more so on inclines.

I’m wondering if anyone is aware of a way to increase fuel pressure/flow?

I’m not sure that bigger injectors are the answer yet.

Would it be possible to increase fuel delivery by changing the fuel pressure regulator for a higher rated item?
 
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Hi Steve
Just a thought.....
With the setup you have, the turbocharger will put additional air in the cylinders at wide throttle openings (more air than with the standard non-turbo set up). This has the effect of increasing the compression ratio beyond the geometric 12.0 : 1, and I wonder if this is causing premature detonation? The knock sensor would detect this and try to retard the spark timing to stop it occurring. Not sure what it does if it can't retard the timing enough to stop it happening.

Mark
 
Changing the FPR for a higher pressure one is NORMALLY a short lived thing as the ECU responds after working out that something is amiss.
Some cars work well with a higher pressure version.
What is the stock fpr on these ?
3.8 bar ? 4.0 bar ?
 
To be honest, the more I’m driving it the better it’s getting, as if the ECU is learning the new levels.

It doesn’t seem to be suffering from knock, it’s bizarre.

Have a great run in it earlier, it pulled really strong through all gears right up to 70 and maintained that with more to give.
 
A2Steve said:
To be honest, the more I’m driving it the better it’s getting, as if the ECU is learning the new levels.

It doesn’t seem to be suffering from knock, it’s bizarre.

Have a great run in it earlier, it pulled really strong through all gears right up to 70 and maintained that with more to give.
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I would see if the direct injectors are shared with any other platform and what the power outputs are.


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I’ve had a very good day with it today. It’s pulled well in every gear at every rev range up to about 5k. I’m not sure how long an ECU takes to learn a change but it’s perhaps done about 40 miles since having the turbo fitted and seems to be getting better every day.
 
A2Steve said:
I’ve had a very good day with it today. It’s pulled well in every gear at every rev range up to about 5k. I’m not sure how long an ECU takes to learn a change but it’s perhaps done about 40 miles since having the turbo fitted and seems to be getting better every day.
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Sounds like long term fuel trim is getting there, will only go so far however


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Very much so. It’s now driving fantastically well. A real pleasure to drive. It’s never going to be a road rocket, but it’s now quite quick and a lot of fun. In my opinion it’s how the FSI should have been sold in the first place albeit less ‘in your face’ with the intercooler.
 
A2Steve said:
Very much so. It’s now driving fantastically well. A real pleasure to drive. It’s never going to be a road rocket, but it’s now quite quick and a lot of fun. In my opinion it’s how the FSI should have been sold in the first place albeit less ‘in your face’ with the intercooler.
Click to expand...

You should try the AVY. However I have never driven an FSI


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