Turbo 4.8 Idle/coast lean issues Bosch 210's

[Jezzro2004]

Hello I have been fighting with cold start issues and lean AFR issues until my truck is operating temperature. I have tried sloppy mechanics tune cabinet injector data as well as injector dynamics data and messed with transient fuel mg, min and default injector settings, and the OLFA tables and as you can see in my tune I am commanding way rich mixtures for cold start and still seeing lean AFR's until warm this is also an issue at highway speeds at light throttle and coast at operating temp once I have a little load everything trims stoich AFR. DFCO is off and I have been using hp tuners for about 3 years now and last summer I upgraded to a 7875 and Bosch 210 injectors on pump/meth injection 17-18 psi. The rest of my tune into boost has been good to go for the past year on this setup but I have exhausted all efforts and research on what move to make next to fix my situation. I have looked over my tune and have got to correct the throttle cracker airflow is the only thing I've noticed. This only seems to be an issue at idle and part throttle. I ran FIC 72lb prior to these for about 2 years without any issues All help is greatly appreciated.
Truck is 74 C10 Gen 3 4.8 DBC Speed density tuned
Vs7875
Returned/ boost referenced FPR on 43 psi
Pump 93/ straight meth injection
intercooled
Bosch 210s from vs racing
Summit 8706 stage 2 cam
Btr springs and pushrods, rockers
4l80e
3.73

[SiriusC1024]

Static Flow Rate @ 58 PSI ( 400kPa ) w/Gas: 2550 cc/min = 240 lb/hr
https://turbo4less.com/product/bosch...l-application/

You have 93.1lb/hr.

Saw a recommendation to use ID2000 data. Looks like that's what you followed except for the IFR. Needs to be 241.69 lb/hr

Even assuming good data those are going to be difficult to tune. Way way oversized.

[Jezzro2004]

I do have the injectors IFR scaled to have more resolution in the timing tables I am not sure what effect that has on other injector tables though.

[SiriusC1024]

Also, how are you planning 17-18 psi on a 2 bar OS?

[SiriusC1024]

I do have the injectors IFR scaled to have more resolution in the timing tables I am not sure what effect that has on other injector tables though.

You have to scale stoichiometric ratio along with that tho. Half IFR = double stoich.

[gtstorey]

Even assuming good data those are going to be difficult to tune. Way way oversized.

You know what they say, buy once/cry once and you will be good to go when you decide you want 2000hp from your 4.8L.

[edcmat-l1]

You have to scale stoichiometric ratio along with that tho. Half IFR = double stoich.

He scaled the VE table to get within the limits of the timing table. Otherwise you're way over your cyl airmass putting you in the bottom row of the table.

[smokeshow]

Top of the line injectors for sure.

[blindsquirrel]

more resolution in the timing tables

Yeah, that's the opposite of 'more resolution', the table still has the same number of rows and columns. Too much... something going on here that isn't going to be fixed by a few messages posted back and forth.

[blindsquirrel]

Top of the line injectors for sure.

Well if they're no good how come they're so cheap? Also, lots of famous-on-youtube people have used them!

[gtstorey]

"Acceptable Fuels: CNG USE "

[edcmat-l1]

Like trying to fill a shot glass with a fire house.

[Jezzro2004]

Can you explain how it's the opposite? Not trying to bash/degrade anyone but I'm not sure I'm understanding how it effects the opposite of more resolution. Does anyone else have a legitimate idea or solution to my issue the post is about? besides bashing what I have/using and everything else off topic? 2000 hp on a stock bottom 4.8??? I think not nor do I have any intentions trying. That reply was also off topic and a waste of time. I've ran this setup and amount of boost for 3 almost 4 years. Other than the injector swap and it's not been babied...Not bad for a 200k junkyard motor if you ask me. I have no issues with my AFR into boost just idle and cruise (light-off throttle). Also can you explain what doubling stoich will change for my setup?

[edcmat-l1]

The doubling stoich thing, ignore it. That doesn't pertain to you. I know why you scaled it the way you did. Everyone is pinging on you for having issues with injector control, when you have great big, huge piece of shit injectors.

[Jezzro2004]

The doubling stoich thing, ignore it. That doesn't pertain to you. I know why you scaled it the way you did. Everyone is pinging on you for having issues with injector control, when you have great big, huge piece of shit injectors.

I don't understand why all the bashing for them I mean they idle great and work great once my truck is operating temp it's the cold temp idle/cruise AFR that has gave me lean issues. I have added to the OLFA and that helped and could fine tune more just wondering if their is other ways to skin the cat.

[gtstorey]

I guess we can't have any fun on here? Sorry I wasted a few electrons.

But did you see that they were designed for CNG before you bought them?

[Jezzro2004]

I guess we can't have any fun on here? Sorry I wasted a few electrons.

But did you see that they were designed for CNG before you bought them?

Yes I am aware

[edcmat-l1]

I don't understand why all the bashing for them I mean they idle great and work great once my truck is operating temp it's the cold temp idle/cruise AFR that has gave me lean issues. I have added to the OLFA and that helped and could fine tune more just wondering if their is other ways to skin the cat.

Because they're ridiculously too big for your combo and they're cheap for a reason. I won't tune them. I turn down stuff like this and snake eaters, any crappy injector especially ones that big.

[blindsquirrel]

I don't know of ANYONE who tried them and kept them long-term. They all found out after a some period of time that the 210s do not like being run on liquid fuels.

[smokeshow]

You could convert to natural gas.