Cammed 392 Twin Turbo Pulling Timing WOT

[Plum7o2]

Hello Everyone!

I just want to give a shout out to all the people who have put real information out for people to share, discuss, and learn from. (HemiTuna and 06300cSRT8 for example)

So I have been tuning my car via speed density and trying to tune for 14psi. Couple of questions.
1 - I noticed that it is pulling timing at WOT and I do not know what table it could be following to get from 14 down to only 3 degrees at WOT.
2 - I noticed my VE tables at 14psi (260ish mg/s) gets up over 300% Should I adjust my fuel injector tables so above 128mg/s to give more fuel per pulse? Would that lower my VE % in that area?
3 - LASTLY - MAX VE Limit.. Do I need to raise this value to over 300 to match what I am seeing in my VE Tables? It was set at 180 because I read that on a post before but think that was for NA.VEBoostTableChanges.hpt tt2.hpl tt1.hpl

[Hemituna]

You need more fuel system.....130% duty cycle and 25ms could be a record, I have never seen em that high lol...
Get up over 100% DC and it will pull timing.
You are getting plenty of pulse width but still not enough fuel so is either pump/s, lack of pressure or injectors too small.
Once you have the fuel supply sorted out, do you have a boost referenced return fuel system? If you do table 34078 (fuel mass vs pressure difference) needs to be all zeros,
or if you still have a returnless system, that table needs to be scaled for boost to keep the VE table sane.

[Plum7o2]

You need more fuel system.....130% duty cycle and 25ms could be a record, I have never seen em that high lol...
Get up over 100% DC and it will pull timing.
You are getting plenty of pulse width but still not enough fuel so is either pump/s, lack of pressure or injectors too small.
Once you have the fuel supply sorted out, do you have a boost referenced return fuel system? If you do table 34078 (fuel mass vs pressure difference) needs to be all zeros,
or if you still have a returnless system, that table needs to be scaled for boost to keep the VE table sane.

Thank YOU! I have been tuning my car based on a lot of your posts! lol

I was trying to see my duty cycle (I must have overlooked it) What you say makes perfect sense. I am on my stock returnless system. I FORGOT I was going to run a boost a pump when I turned the boost up. (Got too antsy)

I am running Fuel Injector Clinic 1000cc I will take a look at that table 34078 in the mean time to see if I can get away with 10+ psi

Thank you again Sir.

[Plum7o2]

You need more fuel system.....130% duty cycle and 25ms could be a record, I have never seen em that high lol...
Get up over 100% DC and it will pull timing.
You are getting plenty of pulse width but still not enough fuel so is either pump/s, lack of pressure or injectors too small.
Once you have the fuel supply sorted out, do you have a boost referenced return fuel system? If you do table 34078 (fuel mass vs pressure difference) needs to be all zeros,
or if you still have a returnless system, that table needs to be scaled for boost to keep the VE table sane.

Capture.JPG so looking at this table. If I am correct. I would need to scale this to read the PR that I am getting and make those numbers GREATER than 1.0 Assuming 1.0 = 0kpa and 100kpa would be "vacuum" under normal conditions.. Then Under boost I would need to treat it like 0kpa is 14psi atmospheric pressure so ABOVE atm pressure I would need to increase the value over what is at the 0kpa level.. right? lol

[DakBuilder]

Hemituna, thanks for all of the knowledge you share on this platform..... I'm nearly complete with my 392 twin turbo build, and I plan on using most of the information you've put out here.