WA Spotted & Chit Chat Thread

[Torquen]

My head hurts

X2...but that could be the hangover

[djkice]

I just dropped the price on my rims in classifieds...

pretty damn cheap imo I paid 550 per rim for them

just needa upgrade to some 18s

[RIP_HSV]

why 18's djkice?

[djkice]

wanna run r1rs

[RIP_HSV]

need more traction? they are quality!!

[XR06T]

So now I will post a question to see if anyone has learnt anything lol. Question is based on real data. If you log an 800rpm idle pulsewidth of a deka 60 (~70lb/hr flow rate @ 4bar), nizpro 72 (~71lb/hr @ 4bar) and a ID1000 (~110 lb/hr @ 4bar) in a warm XR6T operating in closed loop (14.64 AFR) you will see ~1.62ms, ~2.0ms, and ~1.85ms respectively. Tell me why these have different pulsewidths in this car operating under the same conditions?

I was going to say because the injectors are all different sizes, but the smallest injector is open the shortest, which confuses me..?

[IH8TOADS]

Check out this graph, I know the car needs X amount of air to idle and for a 14.64 AFR it needs Y amount of fuel (in theory). So lets assume the engine needs Y amount of fuel regardless of injector atomisation qualities. You will see that even though the deka and nizpro have the same flow rate (well within 3% from my own experience, at idle pulsewidths there seems to be a ~20% difference in flow rate. In this case the deka's are flowing more than the Nizpro 72 and also more than the ID1000's which are rated to flow ~60% more.

Have a read of this article. The last paragraphs on Page 2 is what I'm referring to.

http://www.calibratedsuccess.com/Assets/Documentation/Fuel%20Injector%20Article.pdf

The deka injector is a much quicker reacting injector compared to the bosch once it's energized and this fact is supported by the Ford Racing Parts Calibration Summary and my data above (battery offset values in the PCM attempt to characterise the injectors opening time). The PCM has the ability to adjust the injector pulsewidth via closed loop learning and fix the issue of tuners running bosch deadtime values hence why we still see 14.64 at idle and cruise and why the article says "unless some other correction was active".

[GCTXR6]

any one got a car trailer for one day next week ??????????? will be compensated buy beer

[Mat]

Anyone know what the current hotness for TV's is?

Never been keen on XBox / PS consoles but GT5 looks bombed so im going to need a PS3 and new TV. will 1.5Kish get me a decent HD TV? Thinking maybe around 42"?? Considering I rarely watch TV is it worth going LED over LCD?? It'll be used in a home theatre as well if that makes a difference.

[discostig]

I see why you love the graphs so much Brendan. Finally hooked the X3 up to the car today thanks to the GF's lappy hahaha...been pouring over spreadsheets since! I'm a Saturday night party animal.

The main reason was to have a boost gauge - albeit only readable once I've pulled over haha.

Spikes on gear changes are something to see! Dunno if auto mode is different, this was manual shifts.

This is a medium roll on start, WOT was at about 4k rpm in 1st if I read the Throttle Position Relative right on livelink (cheers Brendan).

Also a graph of acceleration - from what I understand this is the oomph feeling as you get pushed into the seat (feeling change of speed, actual speed irrelevant to senses) that makes the turbo so fun.

Would love to see a NA V8 acceleration graph to compare, since they are more linear power delivery/less 'oomph' feeling.

On another graph I'm getting just under 5.7 seconds 0-60mph! Fast I thought, until I realised 60mph is only 96.56Km/h....convert to 0-100km/h and it hits at 5.96s which is about right. These numbers depend on the accuracy of the speed measuring devices though which can be influenced by road slope of course, and tyre pressures. I should go to the top of the hill nearby and log a 0-100...hahaha! Supercar on paper.