Question For Pfc Guru's - Injector Settings

[Strik3r]

I recently had my PFC Djetro tuned (see other thread for dyno graphs).

I did some research today and found a few things that were wrong, a few of which have been easy fixes (idle ignition control turned off, cold start (water temp correction) settings not quite right, cranking settings not quite right).

I was checking out the injector settings and noticed that the scaling was at 44% and latency correction was at +0.06 ms. I checked the SARD website and for my 1000cc injectors they say 0.97-1ms injector latency.. so the scaling is correct 440/1000 * 100 = 44% but the latency should be (0.97 or 1)-0.77 = +0.20ms to +0.23ms.

What effect does this have on my engine/tune ? Can I simply change it to the correct values and go, or will the tune have been done around this incorrect setting and therefore need adjusting?

And as a bonus question, what effect would tuning with this setting have had on the cars performance / tune.

See http://www.skylinesaustralia.com/forums/Di...hs-t243375.html for the graphs....

I should note that before the tune, i was driving the car (on a run in tune) fine with my spark plugs gapped at 1.1mm (would rev right through to limiter (8800rpm). When we tuned it, we did a full reset and started from scratch. The first thing that happend was that once the base tune was dialed in, the car wouldn't rev past about 7000rpm.. We gapped the plugs down to 0.8mm and suddenly it revved to the limiter... Could this have been caused by the injector latency setting being wrong ?

Cheers !

[Strik3r]

-_^ i thought someone would have a fairly immediate answer

[GTR1993]

Honestly done worry about the latency, i put in 700cc sards into my normal power fc changed the latency and correction wouldnt start, changed latency back to stock and fired first time never had a problem.

[Adriano]

Dont change the latency now, as the whole tune will be effected. The latency would not effect the spark plugs.