Hacking a GM Computer for Boost - plus SCALING the TUNE!
Getting set up to tune an LS for boost, INCLUDING scaling the tune! Fuel settings, trans settings, spark settings, and knock settings YOU NEED. This PCM is a DBW P59, but the basics are pretty much the same.
Follow the build: www.gwellwood.c...
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Turbocharged '61 Chevy Pickup Project Playlist:
0:00 Intro
0:30 Sequence of events
1:24 Changing the Operating System
2:58 Failing the MAF to run Speed Density
4:20 Changing the Injector Flow Rate (IFR)
4:52 Checking the VE Table, and using a "Compare" file
6:20 2-Bar or 3-Bar MAP sensor settings
6:59 Spark Tables and Air-Flow/Boost limitations
8:29 "Scaling" the tune
8:57 Halfing the IFR
9:47 Halfing the VE Table
11:17 Halfing a whole lot more
13:07 Disabling Long Term Fuel Trim (LTFT)
13:47 Improving Power Enrichment (PE)
15:18 Boost Enrichment
16:08 Halfing a bit more
16:17 Altering the Spark Table for the lower Airmass
19:00 Correcting the "Corrections"
20:57 Altering the Base Spark for the lower Airmass
21:23 Altering the Max Torque Timing for the lower Airmass
21:56 Disabling "Burst Knock"
22:18 Desensitizing the Knock Sensors
23:07 Altering Torque Management & Traction Control
24:07 Altering the DBW table to make the most of your power
25:11 Disabling Drivetrain Abuse
25:33 Scaling UP the Calculated Airmass
27:38 Altering Torque Converter settings
28:03 Unlocking the Torque Converter Clutch (TCC) at high throttle
29:20 Epilogue
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Turbo '61 Chevy Pickup Project Playlist:
Planning: • Planning it Out!!
Brakes: • Fixing the Brakes on m...
Running: • First Start of my 1961...
BONUS - Alive: • BONUS: Alive After 20 ...
Driving: • The First Drive in 20 ...
New Drivetrain: • Picking The Drivetrain
LQ4 Refresh: • Refreshing an LQ4 6.0L...
Frame Mods: • Truck Frame: Shortened...
Suspension & Steering: • Laying Low, Rack & Pin...
Motor Mounts: • A Whole Wack of Stuff ...
Inner Fenders: • Tubbing Inner Fenders ...
Turbo!: • "DIY" (Fabrication-Hea...
Coolers & AC: • Placing all the Cooler...
Cab Rust: • Fixing ALL the Nasty C...
Rusty Doors: • Fixing the Doors!
Bed Shorten: • HOW TO: Shorten a Step...
Panhard! • Fabricating a Panhard ...
Hood Repair: • Fixing The Hood
Rear Fenders: • Fixing Rear Fenders!
Nose: • Fixing The Nose!
Bed Patches: • Fixing the Bed!
Front Fenders: • Fixing Front Fenders!
BONUS - Hood Blasting: • Remove Paint AND Stress!
Cab Blasting: • Blasting the Cab!
Frame Blasting: • Blasting the Frame
Primer!: • Primering the Pickup!
BONUS - Trailer Hitch: • BUILD: A Trailer Hitch!
Gas Tank: • Rear-Mounted Gas Tank!
BONUS - Fully Rollerize a 4L80E: • HOW TO: Fully Rolleriz...
BONUS - Install a Limited Slip Differential: • HOW TO: Install a Limi...
Begin Reassembly: • Reassembling the Truck!
Pre-Paint Prep: • Pre-Paint Prep Prep!
BONUS - Tailgate Logo!: • Put Your Own Logo in Y...
Paint!: • Painting the '61 Chevy...
BONUS - Modernize your Steering Wheel: • Vintage Steering Wheel...
Back Glass: • HOW TO: Install Back G...
Windshield Glass: • HOW NOT TO: Install a ...
Door Glass: • HOW TO: Install Door G...
BONUS - Barrel Engine Cover: • HOW TO: MAKE an LS Eng...
Headlights: • Installing & Wiring Aw...
Turbo Exhaust: • Fabricating Turbo Exhaust
Fixing Door Latches: • Fixing Door Latches
Bumper Brackets: • Making Bumper Brackets
Modern Wipers: • Fitting Modern Wiper Arms
Stainless Fuel Filler: • Fabricating a Fuel Filler
Brake Lines: • Making Brake Lines
Battery Mount: • Frame Mounting the Bat...
Coolers: • Engine & Trans Cooler ...
BONUS!! TEASER!! • '61 Apache Teaser
DBW: • Fabricating a Drive-By...
First Start? • Finally, a REAL "First...
Boring Cummute: • The Boring Commute 3: ...
Cup Holders: • Fabricating a Cup Holder
Buckets: • Modern Seats & Belts F...
Tunes: • Build Subwoofer Boxes!
DAMAGE! • This Air Filter Could ...
Car Show: • Knox Mountain Hillclim...
Tuning: • Hacking a GM Computer ...
Пікірлер: 7
Definitely enjoyed it. It sounds like you have to go to a 2-week crash course on LS Theory of Operation to understand fully how each component affects others. You mentioned KZread. I haven't looked yet and I'm not going to be making any PCM changes for some time, but would you say that the resources to understand how what you are doing in one place impacts other areas can be found on KZread? Probably a dumb question. I have a friend who has HP Tuners and has offered to help me when the time is right. He is a huge fan of turbocharging and has several wicked VW's and Audi's. He also loves doing VR6 swaps on VW's. I am thankful for the "tune your LS in a nutshell" overview. It is pretty amazing what they (GM) have done with this and now I can see why it is such a popular swap. I used to think that the LS was just a better small block Chevy, but it is really more like a gearhead's sandbox/playground!
Thank you for the information.
Excellent
🤔😂took me three try’s to get through this, I’m still not really comfortable with the laptop thing! I realize this is a boosted issue, but in my early life, many of us started with flathead motors! Tuning started with the Small Block Chevy and Ford OHV motors, a Posi diff, gears, a handful of mechanical advance weights and springs, some carb jets, metering needles, cams, a vacuum gauge, timing light, stopwatch and a measured distance! Pings, lighter weights, or heavier springs, idles Ok, road test, adjust. Repeat as many times as necessary to get to where you wanted to be. Oh ya don’t forget the revelation that struck while you were in the shower, or while you were asleep, that gave you something to try the next Friday night! This is probably an over simplification, but those were my recollections! Still have the vacuum gauge and Timing light, but there’s no requirement for them anymore! Thanks for sharing your process!
@GregWellwood
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I'm old enough to be very good at carb tuning and ignition re-curving. I wanted to specialize in tuning back in the day. Tuning like that is long gone. If you can tune a carb, you can tune EFI. And instead of nailing idle and WOT and hoping everything inbetween works, you get pinpoint precision for each and every operating condition. It really cool, AND you don't have to smell like gasoline. When I teach kiddies fuel systems, I teach carbs first using EFI terms, and then it's easier to teach EFI because we already use the terms.