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Leaving the N/A world too!

666DAN

By 666DAN,
in Engines & Forced Induction

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predator Grand Master

predator

Posted
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Still having troubles? Ok.. just looking at this, few things occur to me.. but i could be completely wrong.

It sounds like you're not actually getting enough pressure to the injectors in the first place, and that sems to be the source. Even stock N/a injectors should be enough to run a little boost. Have you checked the fuel pressure at the rail, and is within range ? May be useful to rig up a pressure tester to the rail and see what you're getting. If you're not getting the required pressure in, the injectors won't be working correctly and hence may reach max cycle prematurely. Also, check your fuel pressure reg? is there any difference between the stock fuel pressure reg, and say the turbo thing. Again, the lack of pressure to the rail thing springs to mind.

Also the other is to check the source of course, and that is the fuel pump itself. Are there differences between the n/a fuel pump and turbo fuel pump in terms of flow? I know on like the GTS R33 there can be a difference.

Lastly, the AFM signal and when its maxing out is a bit of a telling sign. You tried other AFMs? it seems similar to the circumstances reached when you max out a stock GTS-T AFM when you hit the 220rwkw mark (and hence go for a Z32) when it can *appear* the injectors are maxing out .. and with the emanage, i believe you need a separate injector harness to be able to control/dictate the injector pulse rate which will be important in this situation to override the ECU's injector timings.

.. so overall it sounds more like other factors than the injectors at work here.. and it may just be the end result of them maxing out that is the most obvious.

Hope that might be some food for thought, if you haven't already gone through it all (probably have :()

p.s. thanks for the toulene!

666DAN Grand Master

666DAN

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The new injectors are in and It's now running VERY rich...so looks like it was just the stock ones not having the balls. My AFM is the turbo one anyway so not a problem...I've also got the injector harness hooked up.

The fuel pump is capable of flowing the pressure, also the fuel rail is up to the job.

The second the 385cc injectors were in, everything seemed to be OK...Thursday will be the final check on the dyno and with A/F ratios.

Dan

666DAN Grand Master

666DAN

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A few pics I quickly took, excuse the inch of dirt in the engine bay :D

I can honestly say even driving the car around at less than 3000rpm (to prevent any misadventure until full tune) it would still out perform the standard car revving the balls off it!

  • 4 weeks later...
  • 2 weeks later...
daz73 Newbie

daz73

Posted
Posted

Hello Dan. Very intersested in what you have done as I would like to do exactly the same thing with my R34. Bought it in December and thought I could just whack a turbo on it but told it would be better to do an engine swap. Have you posted outcome of the operation and procedure.

Any info would be greatly appreciated.

  • 2 weeks later...
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  • 3 months later...
666DAN Grand Master

666DAN

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Heya, got on the dyno, but was getting some bad timing retarding happening...waiting for my ignition harness to arrive for the e-manage.....then I can sort out the timing spikes back to something a bit less advanced. Will try and do it in time for the Mercury Motorsport Dyno weekend.'

I'm suprised your insurance was against the idea...my insurance didn't increase at all.

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