I fitted some yellow phase 2 440cc injectors to my MY97 Turbo 2000 at the weekend, using a Carl Davey adapters for the phase 1.5 fuel rail. I'd also had them reconditioned and flow tested beforehand so they should be in good health.

By my calculations (based on instructions in the ESL manual), I need to adjust the injector scaling from 1.00 (which was the default for my 380cc injectors) to 0.85 to accommodate the 15% increase to 440's. However, at 0.85 it's running way too lean across the whole range. I've figured out, through playing with values and watching the wideband that a value of about 0.93 for the injector scaling brings me back in line with where I was previously for my AFR values, but this is then only a 7% increase which seems quite a bit different from the supposed value I should need.

Is there anyone else running 440's on an ESL setup where the injector scaling at 1.00 is calibrated for 380's? If so, what did you set your injector scaling to?

 

Yup , same outcome you found , at 0.85 I had to make my fuel table a complete unit richer to get my wideband readings correct . Like you I adjusted injector scaling to suit and too am running 0.93

 

Perfect - that's exactly what I wanted to hear! :-)

 

No worries

Its worth mentioning tho, i have to tweak my Injector scale come summer / winter

Summer im running 0.94 , now im running 0.92

Reason i have to tweak is , usually in summer with 0.94 injector scaling my AFR at WOT is around 11.2 (what the fuel table requests etc ) , lately at WOT its been down to 10.8

changing scaling to 0.92 brings it back closer to the desired 11.2 at WOT

cheers

 

Interesting.
So the manual is just a guide and not exact I'm guessing?
My injectors have increased by 68% (440's > 740's) so I would expect to change the scale to 0.60. The car runs like a pig with this scale,0.67 gets the car running sweet and lines up the AFR table with the WB pretty much perfectly.
I thought maybe this was down to me running mafless but seems not.

 

Yeah, the manual is pretty much a guide not exact from my experience anyway as some things it says you cant do , you can etc

At 0.60 compared to 0.67 was pretty lean if it requires 0.67, no wonder it ran shat lol

like me at the beginning, i set my injector scale to what it should of been mathmatically and never had a fuel table to wideband match, now at the setting the car likes, its like for like, bar a .digit or so

 

Ah - makes sense. I think I'll probably just leave mine in the middle at 0.93 and accept the small loss in performance from a richer mix, sometimes!

Interestingly, the car seems to be running much smoother now that it did before. I'm not sure if that's because I've now got 4 nicely balanced injectors (after cleaning and flow testing), or because the phase 2 has a better spray pattern, but it's definitely smoother than it was on the old injectors.

 

Where did you take them for clean and flow test Ben?
Could do with putting mine in for a clean but need a fast turnaround.

 

AS Performance have an injector cleaning/testing service - was quite reasonably priced the last time I looked into it too.

 

I did ask Alyn a few months back,he was really busy and wasn't a fast turnaround for injector cleaning at that time 7-10 days iirc. I will give him another call next week but as he provides a top service then the guy is always sooo busy
I can't have my car off the road for too long if I can help it.

 

http://injectortune.co.uk/

I used them after seeing someone mention they were very pleased with the service and results them on here a few months ago. Checked them out on some other forums (found via Google) and read very positive reports of them there too.

Cost me £57 and I think I received them back again within about 3 days from when I posted them - so very quick.

 

I also upgraded from 380cc to 440cc and I have my injector scaling on 0.85, but I had it mapped like this, and it runs perfect like this, so I guess there are 2 ways to do it.

 

Thanks @ @ben.harris sounds very good

 

I take it that your desired/input fuel table figures are not what you get as a reading on the wideband?
Or would it be the maf scaling has been change to line up the AFRs?

 

As asked , do your wideband readings match the desired AFR from the table at WOT etc ?

 

I drove my car with same conversion over a year, no problems, only funny thing is i measured yellow's and they flowed 500cc not 440, injector scale was 0.85, afr was spot on as long as i used maf sensor. If i chaged to 2,5l engine, i changed injector scale back to 1 and i had to make very minimal changes to fuelmap, with 0.85 scale it was leans as crazy, biggest problem was "tip in enrichment" that cant be changed in esl, so i needed to make it richer with injector scale. Now i have id1000 injectors, should be somewhere near 0.4, but i use 0.54 and complete fuelmap reset
It is all only trial and error, i have still some problems and i belive i get them fixed only with ecu change...
With yellow injector's i had zero sideefects, worked very well, better than was with originals to be honest.

 

I didn't do the mapping myself. But I do have the ability to read it and can put it up if you could tell me how to do that. I'm running the ESL board 1.1. But a mate of mine did the mapping of my car