3.9 V8, next step to find some cheap extra power?

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Originally Posted by Big Dog

I Have just replaced my injectors with ones for a Magnor
they have 20% more flow and a better spray pattern
More info at Ricks 4Wdive on Lawrence drive Nerang 0755966662

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You mean (Mitsubishi) Magna ?

Tell me more, - am very interested !

James in Gosnells

'95 Classic Vogue SE. 3.9 on petrol only...

I wonder whether an injector upgrade is cost effective - at $80 per it's quite a chunk.
The thing is, what's important is achieving the optimum AFR. Bigger injectors will only help if that the std injector can't keep up i.e. is skewed by the engine breathing better by cam change, flowing , forced induction etc.

Maybe fitting a wide band 02 sensor and booking a bit of dyno time with someone really familiar with the Wolf may be a good start..

The other thing is that the std RV8 14CUX operates bank fire injection - 2 channels. The Wolf 3D afaik can run 4 channels so you can group the injectors in pairs to approximate the firing order i.e. 1+8, 4+3, 6+5, 7+2. Even so, whilst you're injecting into the nearest inlet runner most of the charge is into the plenum "cloud" i.e. the injection timing isn't anywhere as precise as the ignition timing.

So, I kinda wonder if getting gains with new injectors - better idle, response etc isn't more down to an injector in good nick as opposed to better atomisation et al?

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I wonder whether an injector upgrade is cost effective - at $80 per it's quite a chunk.

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I really didn't notice much difference in Gen11 or gen3 injectors, However the thing is that they are MUCH cheaper than getting new Lucas injectors.
I bought a new set of 8 gen11 about 5 years ago for AFAIR $240 and a reco set of gen3s for $120 or so.
I am not so happy with the reco ones as I think they drool, and I intend to have my Gen11s cleaned and reinstall them.
BTW car makers size and fit injectors that have ample capacity and good idle. You get nothing but bad idle by fitting bigger injectors as the 19Lb per hour gen 11 and 3 and the Lucas will easily run a 4.6 and AFAIR also are stock on a 5litre Holden.
Regards Philip A