Ok, my previous tuner had enrichment rate set to .0195.... so I changed to 1.3 and it gets right to 14.6afr now at WOT, feels much better!

My problem is that it is still running lean(like 14.8-15.4afr) at idle, and slow cruising speeds.

I am still very new to tuning, but very determined to figure this out and learn for myself.. so bear with me! lol

Attached are my last log and current tune file.

What I have changed since the previous tuner had it..
He had it set up for like 34lb injectors.. it has(and had when he tuned it) 43lb injectors
rear end gear swap to 4.11's
corrected the enrichment rate to 1.3
copied a eq ratio table for open loop from another 408 with an ms3's tune file


Specs of vehicle:
04 silverado
408ci(10.01:1 cr), 317 heads hand ported/polished(unknown flow specs), MS3 from TSP: 237/242, .603"/.609, stock intake, stock TB(drilled for idle airflow)8.1L marine injectors(42?43?lb/hr).

Thanks a lot guys, yall have been a great help to me!
-Lurius

 

14.7 is what you should be +/- for normal cruising and idle. You should be way richer at WOT and in PE, somewhere in the mid 12's I'd think.

How are you judging AFR?

 

wideband I got in GB a while back on ls1tech

 

I am no tuner but why does your IFR scale backwards?

 

Im no tuner either, so ya got me there.. I used same tables as used on 3 different other tunes with same injectors.

 

returnless fuel system, right?

 

Post a couple screenshots so the non hpt guys can see.

 

Screenshots of what? let me know what screens, and what type of graph and ill get'm to ya asap.

 

 

Um ya thats wrong.... Your IFR table is f'd up. You should be seeing a afr in the high 14's at idle and around 12.7 or so at WO. The PE table looks stock...