Need a base tune for a 426 stoker motor

[Clatall]

I just got done doing a 6.1 stroked to a 426 in a 2006 Chrysler 300 srt8 and I was wondering if anyone else out there could possibly lend me a hand I need a base tune for the motor and trany!! This is an n/a motor

[HackAbuse]

I have a tune for a 426 in an 06 Jeep Cherokee, not sure how similar it is to your application offhand

[GFB Performance]

What injectors, big or small cam, stock TB...?

[Clatall]

90 mm tb the cam is gross lift of 597 574 duration of 222 230 the injectors are from a 392 hemi think they are like 550cc, headers cold air intake

[Dynamic]

I'm in the same boat with a 392 stroker built from a 5.7 in an '04 Durango. Cam is 221/230 on a 115 LSA, stock TB, injectors from a 6.4L (392) also. Any help would be appreciated!

Sorry... Not trying to hijack. It just seemed like the OP and I are after pretty much the same thing, so I piggybacked his post.

[Abdulaziz_pe]

it cant be difficult

1- change the injector data , and it is from 392 ( which i doubt due to the connectors are not the same ) you can copy it from 392 file
2- increase your throttle flow ( just the ones below 100) by 10% )
3- lean out the VE tables by 15% ( up to 1000 RPM only, just for idling )
4- set your idle RPM on the ones that below 800, to 800

write the tune and see how the engine runs

these are for initial startup to let you adjust well

and keep us updated

[Dynamic]

Yeah, I'm on the same page with you. I'm sure I can get it dialed. I just wondered if anyone had a similar setup, and would be willing to share their file; mostly to compare with the tune that I come up with on my own...

I actually just got the car fired a few days ago, and I'm currently waiting for my HP Tuners Suite to get here. It does run and idle. The fuel trims have adjusted far enough to run in closed loop. Open loop is pretty rich, especially with the 392 injectors. I did put the stock injectors back in just to try to put a few miles on the new engine, but it dies every time you come to a stop. The PCM just can't get along with this camshaft just yet. I'll put the 392 injectors back in when HP gets here and start tweaking.

The changes you listed are pretty much exactly what I have planned to get started. I'll tune with fuel trims to get things close, then use the WB's to dial in the PE and open loop stuff.

FWIW, the injectors I have are out of a 2015 6.4L, and the connectors are identical. They are a "bolt-in" replacement for the stock 5.7 injectors.