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[05omegav6]

Are the Bosch injectors from a Vectra VXR interchangeable with the stock Omega ones?

If so, will the fuel pump tolerate a higher fuel pressure regulator, say 4.5/5 bar... Or will the fuel pump also need uprating?

What, if anything might be gained from this

[chrisgixer]

Unless it flows more air, to match the fuelling to, will it make any odds at all?

[05omegav6]

Unless it flows more air, to match the fuelling to, will it make any odds at all?

Intake plumbing could be tweaked to keep the front multi ram, possibly a second intake with MAF wired in parallel.

[chrisgixer]

Unless it flows more air, to match the fuelling to, will it make any odds at all?

Intake plumbing could be tweaked to keep the front multi ram, possibly a second intake with MAF wired in parallel.

Depends where the restriction is. Exhaust, manifolds, inlet, engine capacity.

Improve air flow through the engine, then match the fuelling to it.

Increasing "capacity" of fuel flow won't improve fuelling and hence won't improve power. Air flow first, then see what you need.

On omega, the restriction is said to be exhaust manifolds. Inlet, exhaust, filter, engine will take more than stock.

But the theory is fitting straight through manifolds moves the power up the range. Which isn't always desirable.

Not sure anybody has tried this approach though.

[zirk]

Unless it flows more air, to match the fuelling to, will it make any odds at all?

Intake plumbing could be tweaked to keep the front multi ram, possibly a second intake with MAF wired in parallel.

ECU wont like that, probably the only way forward would be to get similar spec MAF but with a bigger Air Flow Volume, assuming of course you could bet more air to flow through it in the first place.

[Kevin Wood]

You'd almost certainly need to port the heads and change the cams to get anything significant out of it IMHO. Only then will you know if the injectors are the limiting factor. By the time you get there, you probably need an aftermarket mappable ECU to map it properly.