can you add them to this and any others you've found?
ty

0.08517/0.00167=51 (Hex 33)
0.08350/0.00167=50 (Hex 32)
0.08684/0.00167=52 (Hex 34)

0.084339/0.00167=50.5023 Cannot be saved as an integer.

Study FR and check how ME7 is doing its fueling.
KRKTE is just a tiny part of fueling algorithm.
You could even not touch it at all and modify other parts of algorithm maps/constants to get proper fueling but as BOSCH made KRKTE for the purpose of "calibrating" injectors its good practice to use it.

Short DIY for ME7 fuelling for all DIY tuners out there

When replacing injectors you need to take a few maps into consideration:
- TVUB - injector dead times (this produces tvu_w variable)
- FRLFSDP - this is relative fuel pressure correction table (remember what gives final fuel amount is not fuel pressure but difference between fuel pressure and manifold pressure)
- KRKTE of course (this multiplied by FRLFSDP gives frkte_w variable)
- FKKVS - injection correction (this is simple multiplier for final injection time)

Your injection time is calculated with this formula:
(rk_w x frkte_w x FKKVS) ->(limited by TEMIN) + tvu_w = ti_b1
rk_w is fuel amount mass calculated by the ECU.

As you can see KRKTE is like slope variable and TVUB is like shift variable in linear function

So if you get under/over fueling in all rpm/load range you adjust KRKTE. If you get more/less fuel corrections closer to small injection times you adjust TVUB.
Then for final adjustment you can use FKKVS.
Of course you could do all of this just with FKKVS also but this is not how BOSCH meant it to be done

And very important table, ignored by most tuners is FRLFSDP.
There are 2 types of this table in Volvo ME7.
For returnless fuel system cars axis is pu_w-ps_w - difference between manifold pressure and ambient pressure.
For DECOS cars axis is pistnd_w-ps_w - difference between manifold pressure and fuel pressure.
For returnless fuel cars axis is usually ranged up to 1,2bar of boost so you need to rescale it for higher boost levels (well you don't as 99% of the tuners don't do that but if you want to keep good practices then do it

And another very important detail. There were 2 injection time scaling factors in Volvo ME7 - 0.00266 and 0.00320
Very important when you look at injection times and calculate injection DC to see when do you max out your injectors.

If your fueling is properly tuned you should have fuel trims in the range of 1-5% top in all load/rpm areas.
If its like 17% or more - then something is very wrong in the tune.

And as for calculating KRKTE - if you use BOSCH injectors don't use any stupid KRKTE calculators or formulas - they are all wrong
Just look at official BOSCH doc's and look at fuel flow rating - but very important - there are many ways to give injector fuel flow ratings - there is a few mediums (ethanol, methanol, gasoline), a lot of units (lb/min, cc/min, ml/hour and so on) the pressure injector were tested. So if you see something like 440cc in injector description - without units and pressure - that value basically is useless.
But as for BOSCH injectors you can always check their ratings on the official BOSCH pages (hard to find in Google as this search engine recently is more like market place then information finder - but there are other search engines). And just divide new injector rating by old injector rating lets say 321/278 = 1.15 -> and just multiply KRKTE by this - but use raw byte value (and obviously round to nearest byte value)   - do not confuse yourself calculating factors - factors are useless with KRKRTE. You just add unnecessary complications for yourself

And if you get injector from some other brand - well you then have no choice but look at ratings they give to calculate KRKTE and then just fine adjust it on the road unfortunatelly.
For example Volvo BOSCH so called green injectors are called also 440cc. If you get for example Deatchwerks 630cc injectors - you have to assume those ratings have similar fuel pressure and units and just divide one by another and do the same simple KRKTE multiplication as before. But this time you need to check fuel trims on the road and fine adjust it probably. So simply speaking you need to empirically look for KRKTE.

I hope this all makes sense

-delete this-

Thanks, I think I got KRKTE right as fueltrims are spot on. 3.8bar FPR installed.
But when install green injectors I know ill need to adjust other maps etc as mentioned.

A lot of reading is on me7.1 that seems a tad differnt than p80 me7. I have gone over the wiki a few times, just need it to sink in. Im more trying to figure out how to find the maps etc.
Ive found quite a few but working out axis etc and making sense of it eg what column is what and how do you know what voltage, rpm, etc is each.  Have to find TVUB and other fueling maps.
I found a 2001 V70 and 99 S70 2.4T XDF but doesnt align with the C70 2.4 T.
Ill do some logs, and run the fixer etc, figure out that. then do some more reading But thanks for all the explanations, my brain will hopefully eventually click, its just drowned in other stuff with work and life - Taken on a multi GPU / CPU cluster at work / AI etc etc.

I have asked Rob for a injector Tune, but would be good to know how it all works so can fine tune things my self esp when Im doing so many things to the motor etc, and me being me likes looking at data and manipulating things untill its perfect.

Its a 2000 Volvo C70 2.4T Auto

This is the Info I found:
Software appears to be at 18025: 2612045591           37359462
From Hex Editor: 32 36 31 32 30 34 35 35 39 31        30 33 37 33 35 39 34 36 32


ECU Part Number: 0009470738 A
Software Part Number: 0009487546 C  & 0030785805 AB


1.0 Vastlab Volvo ID: 9 9W20 P80 B52X4XT
ME 7.0 10ER


Base PDF fr Bosch E7 SDB259 by HJ 060124
No. ADMINISTRATOR

10EERHJ A21 2006-0-24

Thats Amazing. Thanks

Ill have a good look, seems to be working with quite a few maps etc the ones I need anways,. Wish I could buy you a beer