RS_Matt

For those running one what are the typical highs and lows recorded during a journey with the odd blast?

I seem to be getting

25.2 (on over-run)
11.3 (lift off)

MattyB1983

iTrader: (51)

What readings are you seeing with WOT ??
Is it a proper wideband AFR or just a cheapy ?

RS_Matt

Torque pro app, lol . Bit laggy but seems to be on the money.

Scott.T

iTrader: (2)

It should be around 14.5 at idle and cruise.
And will drop to high 10's - 11's if in stock tune.
However the OE lambda won't read this, so you will flatline at the 11.3AFR you are seeing (it actually only reads to 11.25AFR IIRC).

RS_Matt

It cruises/idles between 14.5-14.8

I have seen 11.27 but it still recorded at 11.3, there may have been a few 11.25's when I was actually paying attention to the road.

So rhetorically speaking there's no indication how rich I actually get changing gears

I know a car leans off on over-run but are 25's normal for over-run peaks?

Scott.T

iTrader: (2)

Stoich is 14.7AFR so it sounds fine.
You don't need to worry about over-run as it very much depends on the ECU type & map.
Some run rich on overrun i.e low numbers, others run lean as the ECU switches the fuel off until a re-injection point for example 1500rpm.

As long as idle/cruise is around 14.7AFR and on boost its drops to 11's you'll be fine.
If you see 12's or 13's on boost then your MAF is likely to be packing in or you have a fuel/air issue.

RS_Matt

Cheers for the info! I can't really read boost values due to the apps lag, it's good for steady revs though and light acceleration.

The Pink Ninja

iTrader: (23)

^^Or fuel pump on its way out as mine was or a leak from the vac pipe on the stock FPR, Had my defis set on static FP and on boost dropping below 3 bar...confirmed by high 11`s on my AFR, Set up correctly its an engine saver

RS_Matt

What would dangerous boost creep give? still under 14.7:1?

tubbytommy

iTrader: (20)

You havent got an afr gauge.
For a proper reading you need an exhaust probe.
That ap is useless I have it and it miles out compared to my afr gauge with exhaust probe

RS_Matt

Did you select the extra sensors option in the settings? it slows the app down but it gets a tad more accurate on the fuel side of things.

My mapper would only trust an exhaust probe btw.

tubbytommy

iTrader: (20)

How do you know its accurate??
Only way for an accurate reading is with exhaust probe.
Without this its crap...

MattyB1983

iTrader: (51)

Same here, my wideband afr and fuel pressure gauge saved me from a hefty bill. Fuel pipe on the pump was blowing out fuel at high boost. Noticed my readings leaning out on the afr for starters and then saw the fuel pressure drop off as boost increased. I was seeing 13's on the AFR !!!!

RS_Matt

My MPG came down from ludicrous to what it was. It might not be the same for AFR but it reads the idle right. I've even got the boost gauge reading right after some tinkering.

RS_Matt

5 bar.

tubbytommy

iTrader: (20)

I didnt say the whole ap is crap as its not.
The afr bit.is. It cant give accurate readings as to do this requires an exhaust probe.
Without a probe to measure gasses what exactly is it reading to give a measurent??

Gambit

iTrader: (6)

is it not reading the ecu value via o2 sensor? Same as psi3 uses to display it

tubbytommy

iTrader: (20)

Probably and therefore not accurate.

Gambit

iTrader: (6)

Yep its not a true wideband

The Pink Ninja

iTrader: (23)

They are a worthy investment if you know how to read them, A lot of people bitch and moan about the price of defis but i`ll say it again that they are a hell of a lot cheaper than an engine rebuild

MattyB1983

iTrader: (51)

I think decent gauges are very important, not necessarily defi's but as long as they are decent. I had prosport stepper gauges and a innovate wideband afr gauge. Most don't bother with fuel pressure and afr gauges but I think they are very important.

RS_Matt

Would a car have to dangerously over-boost ect quite a few times before the CEL comes on?

swaynie

iTrader: (6)

your trusting a app on narrowband hmmmm take the afr with a pinch of salt tbh.

RS_Matt

I just used the app option to see what over-run readings I was getting, I never went on boost as my inner left front brake pad has gone.

Scott.T

iTrader: (2)

It's a pseudo wideband on the newage. Not as good a the correct probe, but alot better then the classic's narrowband.

When mapping/logging a Newage the ECU 02 reading seems to track the probes reading quite well (certainly within a few %), although it will only read to 11.25AFR.

tubbytommy

iTrader: (20)

Driving on roads like that

RS_Matt

And it changes again!

The operation of the Imp is nearly as sophisticated as Tommy's brain.

The Pink Ninja

iTrader: (23)

What are you talking about, Nothing has changed, the newage is NOT a true wideband and doesn't have the range of a true wideband, It's Psuedo wideband as stated above but better than the classics narrowband....surely you must understand that?

If not.... http://www.google.co.uk/search?q=pse...&client=safari

Kwik

iTrader: (10)

You have to if you want to keep up with your "opponent".

The Pink Ninja

iTrader: (23)

Whilst over boosting with the CEL on and a sticky brake calliper which some how seems to help give 51 MPG