HELP NEEDED 2014 LT1 with LT4 fueling issues

[H8EDC7]

I have a 417 stroker, F1r, heads, cam, dual nozzle meth, flex fuel, LT4 injectors, LT4 pump, Cordez low side system. F1r only cranking 16.5psi at this time and seeing 968rwhp.

We are having issues with the 2014 LT1 computer accepting the commands for the LT4 components... cannot get enough fuel thru the injectors. Low pressure is cranked up, we've tried that.

ethanol content is 33%

A/F ratio is steady thru 6500rpm at 13.1 although it was a chore to keep it below 13.8

dual alky nozzle running ( 2 ) # 15's of pure alky

at 5750 RPM fuel pump pressure is 47 psi, fuel rail pressure is at 2868 psi

at 6400 RPM fuel pump pressure is 41 psi, fuel rail pressure is at 1295 psi

We have both versions of HP 3.4 and 3.5 but just cannot seem to get our ecm to like the 2015 LT4 fuel settings..... WHAT ARE WE MISSING???

I'D LOVE A PHONE CALL TO WALK THRU IT, I'D PAY FOR THE TIME AND HELP. So frustrating. We are wanting to add boost and get these numbers over 1000rw but she is stuck in the mud right now.

Don't know if phone numbers are allowed on here so i will wait to publish my number.

I am hearing that Mr. Higgs Boson is the man at this topic and would love to hear from him.

thanks in advance for any input!

[Ben Charles]

Post the tune!! Higgs had a 14 and the OS is different then the 15 cars, so there are different changes

[Ben Charles]

How big are the meth nozzles!?
I've done close to 750whp on stock lt1 fuel system and twin 15gph nozzles with cam lobe

I'm sure you have a cam lobe, and with CPR low side and lt4 hardware should be about where you are at since lt4 hardware about 100 more rwhp

Just noticed flex fuel!! What percent?? You are at the max of your fuel system...

[H8EDC7]

2 #15's of pure alky

[H8EDC7]

Flex fuel is at 33%

[Ben Charles]

Gotta be out of fuel!!! Time to add more meth, go pure 93 or 116, or add port injection

I would not run it at 13.1 either... plus need to be tuning that rig in lambada with flex and meth