Hi All,

Is there (or could there be) a section on this forum for people tuning the 0411PCM swaps for the Small block TPI setups on the thirdgens.

Thee conversions seem to be pretty popular, but there's almost no information on the requirements for the SBC motors.

I've completed my swap and trying to learn about the tuning process, and thought the best way to learn would be to look at other people's BIN files and what engine builds they have to see what can be altered to get a tune running better than it is, but there's no BINs out there other than the stock LS1s.

I'd love to know if there's a base spark map to start with, or some knowledge base of where to start with these tunes.

Anyone else think it would be something useful, or is it not that popular?

 

Is the 0411PCM a replacement for the original ECM units with some modification?

 

Some guys here have done it. I think this is the best forum for those posts.

You'll find more info on other websites though, as those swaps are very common on other platforms than thirdgen fbody, and also these forums are not as active as they used to be 10+ years ago.

I can think of a few members who have some fairly impressive builds using those ECM's, so you should still find the help you need.

-- Joe

 

Unless you are running the 24x coil per cylinder setup, you need to start with a 2002 5.0 or 5.7 Express van calibration for a 305 or 350 TPI swap. The stock Van calibration will run the engine once the VATS, Error codes and non electronic transmission are accounted for. The Timing map is not overly difficult to transpose from the TPI setup to the 0411. Just have to log RPM, MAP and average GMS/CYL in a Histogram Then use the average GMS/CYL at that MAP & RPM reading to fill in the timing map from the TPI.

 

Yeah, mine is the coil per cylinder setup.


My bigger problem was it wasn't so much a conversion but a brand new build and a changeover to 0411PCM at the same time.


So I went from a '165 ECM TPI 350 mild crate motor to a 400SBC AFR heads, XR270HR cam with HSR EFI intake and 28lb injectors.


There wasn't much of a base map I could use, and because I was using the AVT-852 cable and Tuner Pro with 0411 XDFs I only had 1 or 2 OS's I could choose from to work with.


Luckily my car is now in the tuners hand and at the dyno as we speak, so it should be all sorted in a few hours, but I've spent 4 years on the project and 2 of those were just on the wiring and 0411 side of things.


I just figured it would be a good thing to have the posts and threads in 1 section instead of some in DIY EFI, some in TPI, some in electronics etc.


Basemaps, software / tuning options, troubleshooting, wiring diagrams etc.

 

Tuning it is no different than regular ecm tuning. Just the software has changed.

Now most guys use hptuners for ls1 pcms. Using tunerpro and the obd2 xdf i have no experience with but it sounds like it should have similar layout to tuning tpi with tunerpro but with table values similar to what you see in hptuners.

Most sbc still want 20-25 deg idle or more, mid 30's to low 40's cruise and part throttle, and 32-38 deg wot. Just gotta translate that into the tables in the 0411. Ls1 timing table actually isnt a bad place to start. Its typically conservative at wot at 26-28 deg. Cruise is aggressive so you can remove 2 deg or so to start. Wherever you see a 40 value or higher bring it down some to start

 

In my experience MOST of the small blocks I tune like 46-52* of timing at cruise. Running at a minimal load, say 3,500+ rpm and 30-40 KPA

 

Yeah it can vary. Chambers and air fuel mix will influence. My cruise stuff tends to be alittle lower than 3500, mostly 2000-2700 and 50-60 kpa.