this is a nice technical one for you lot to get stuck into

after finaly getting my andrew c ecu monitor up and running i have a few numbers id like advice on

car is a m7 97 wrx
276bhp model
engine mods are
K&N Pannel filter
Tas Piston recirc dumpvalve set to 18psi dump
Revolution exhaust system in center decat
downpipe cat is still present
ngk plugs
samco turbo hoses (Y piece one is not fitted at present)
all boost vacum type hoses are replaced withred silicone hose

now i have got these readings

under full throttle i got
injector duty cycle 90%
AFR around 850mv which acording to andrews figuers is a touch to low (10mv)
in 5th gear 1.35bar boost
holding 1.1 bar boost (these seam pretty high to me lol)
neve hit any fuel cut or anything, and the cars is driving much better
ignition advance seams to match the throttle position pretty well and i see about 45 ish
full throttle gives me a maf reading of 5.00 (this also seams to increase pretty smoothly

i cant rember the rest now
but does anybody have access to the proper technical sheets to see if my car is within spec?
fank yoo

 

Micky,

What does your MAF read at idle?

I think I may have MAF Voltage and Load the wrong way around.

Andrew...

 

ermm
i cant rember but i think it reads nothing at all?

 

it has no devices to raise the boost
except maybe the center cat removal?

it is a ihi vf turbo which aperntly came standerd on this year

ive just been out again and it was holding about 1.1 bar
what is the fuel cut set at on this model?

 

Steve,

Micky's car is a WRX not a UK car.

Funny enough my MAF and Load values look right, I think I must have swapped them in my development code some while ago and not updated the release code or documentation - I'll remedy that shortly.

Andrew...

I am beginning to feel the need to develop a monitor for a different ECU altogether!

 

could this be that the wrx boosts a lot harder then the uk car?
this could be where a lot of the extra power comes from?

 

yep -sorry my mistake.. didnt see the WRX bit on the end there!
yes - it will boost more, as the IHI turbo - hence more pwr !

i susspect that mite be the case Andrew .. it's definatly the case on my ecu& software - but the DT107 is still on the floor gathering dust !

new ecu - hummmm so I've heard / seen !!

StickyMicky - I think your car looks ok, apart from possibly needing a firmware update for the ScoobyMonitor to correct the MAF/Load issue!

Steve

 

hmmm on the way home i let it idle and the "MAF" reading was about 0.18
full throttle and max boost style down the motorway it was 5.00

i saw 1.34bar boost b4 it settled down to 1.1 bar :s
the things pulling like a steam train

 

Has anyone got any plans for software to take the logged data and plotting it onto a graph so values can be easily compared e.g. boost/load/rpm values. Should be relatively easy for someone with some Excel knowledge, maybe a macro or other simple method?

Not after anything sophisticated just something a little easier to interpret than endless rows of figures

 

Paul,

I've done this (see here)
my program outputs the raw ecu data, so the excel speadsheet has to do the conversions & then you can make and graph u want. I did try to incorporate this via OLE linking from my program, but it just woundnt play ball & so I gave up & did it the hard way !
it really depends on how, what ever your using, outputs the data.
if the ScoobyMonitor for example, outputs the actual values, then you can actually plug this into the demo version of delta-dash for some nice graphs ! , & likewise it's easy to make excel do it too - just use the chart wizzard & add the series you want.
hardest bit is working out all the columns & what conversion formula goes with what!

Steve

 

hmmm
anybody got a link to a demo version of delta dash?

 

hmmm got a demo version
everything is auto tho :s

 

Sticky,

humm..not tried a recent version, but I have an older version & yes, it's auto, but you can load in a CSV file too & just look at the graphs. cant you do this anymore? (not that I do, they are too small really - XL is the easier way!)

Steve

 

Cheers guys

 

wrt other conversations we've been having on this subject, we think the load & MAF are the wrong way round.
the MAF should never hit 5v & should be somewhere around the 4.2-4.8 range on WOT. mine sits at 4.45, & a mates sits at 4.52 (both MY97 - he's got an induction kit on)
{edit to say} should be about 0.8-1.2 on idle

that boost is too high for a standard MY97. does it have a chip/dawes to rase the boost?

850mv isnt bad, but cant remember what that translates to in % (&cant be bothered to use search to find out )

those reading are similar to my car & another MY97. I think they are similar to Andrews too . but I think he's playing with other bits at the mo

the only thing is the boost - that's NOT standard! should be 0.9 with maybe a small peak (unlike my monstrosoty that peaks & troffs like the himalayas! (SP?))

Steve

[Edited by ScoobyDuck - 6/11/2003 1:54:47 PM]