email me for an explanation of the scaling

 

I know how it works..

its just for 90550001 they changed the algorithm slightly...

i didn't see the last part of that change, which is why I posted

 

I'm seeing 262.14ms in the minimum IPW field, that doesn't sound right to me but maybe I'm missing something here.

 

yeah I screwed it up - I updated P#1 again

 

Ok, I changed it to 1502 address and now it shows 0.020ms. I was expecting to see something like 1.2ms is this correct? When we last tried to tune Gary’s car on the FIC 2150cc the IPW at idle was 1.28 so I figured that needs to go down to something like 1.10ms in the new Minimum IPW field but if it's already .020 then I shouldn't' be hitting a limit anyway right?

 

any luck with 96260009 anyone?

 

The 0.02ms is the stock value Mellon.

Original formula was [value] * 256 / 1000 = ipw min in ms

Now the formula in the rom is [value] * 4 / 1000 = ipw min in ms

So your original value of 5 in the rom is 5 * 4 / 1000 = 0.02ms

 

yeh so you need to "reset" it to something reasonable..

the algorithm changed but the initial value hasn't, so you need to set that for the new algorithm..

 

gotcha, I was getting hung up on what was in there but that makes sense now. We're testing some values on Gary's 2150's with pump gas currently.

 

I will say it again, the stock ROM scaling equation is T*0.256.
So a value of 05=1.28mS

 

???

 

do you have the xml for rom 94170715

 

8858xxxx

please check...

<table name="Minimum IPW #1 SHLL2->NOP (0x4908 -> 0x0009)" category="Misc" address="29350" type="1D" scaling="Hex16"/>
<table name="Minimum IPW #2 SHLL2->NOP (0x4908 -> 0x0009)" category="Misc" address="29352" type="1D" scaling="Hex16"/>
<table name="Minimum IPW #3 SHLL->NOP (0x4900 -> 0x0009)" category="Misc" address="29354" type="1D" scaling="Hex16"/>

<scaling name="IPW16:SHLL0" units="ms" toexpr="x*8/1000" frexpr="x*1000/8" format="%.3f" min="0" max="65" inc="0.008" storagetype="uint16" endian="big"/>
<table name="Minimum IPW SHLL0" category="Misc" address="1102" type="1D" scaling="IPW16:SHLL0"/>

 

why not just drop fuel pressure from pump controll at idle?(bigger value resistor-lower pump voltage before bypass.... lower injected quantity...
and just use normal or even higher ipw for propper controll , because around minimum ipw of the injector(not ecu) behaviour is eratic
i use standalone ecu(quit oem long time ago because lack of support for jdm roms) and just run pump speed through pwm output but a small change of the resitor get's same result,and car will bypass it after certain rpm, tps ,load so it does not get affected and you get proper idle/ac.....
link for diagram....http://www.roadraceengineering.com/e...elpumpinfo.htm
i had this issue long ago on many cars, and always used bypass,even with simple electromechanical control, but now it's easy with ecu controll.....
just my 2 cents..as it seeems this is taking almost 2 years now and still no adequate solution
whit lower pump flow you can run even bigger injectors

 

Dude, lowering the minimum IPW works perfectly...