Help Tuning VT304 with Supercharger

General Tuning Questions And Discussions
Wade
Posts: 562
Joined: Mon Jul 11, 2016 6:29 am
cars: Vr 5.0 statesman vr exec 5.0 turbo vy clubsport

Re: Help Tuning VT304 with Supercharger

Post by Wade »

This is a stock l67 commanded afr table. Its commanding richer at 550mg. But after logging i may see that in my commanded afr table ive setup its actually commanding that at say 400mg
Attachments
6A2D92D7-628F-4B09-A42B-BDB80CBE4533.jpeg
Wade
Posts: 562
Joined: Mon Jul 11, 2016 6:29 am
cars: Vr 5.0 statesman vr exec 5.0 turbo vy clubsport

Re: Help Tuning VT304 with Supercharger

Post by Wade »

This is where I needed to set the commanded afr’s up to actually match my logs of what I was targeting on a mild l67 I’m remote tuning
Attachments
FB3440F5-9B93-4506-9416-BE611116B236.jpeg
Wade
Posts: 562
Joined: Mon Jul 11, 2016 6:29 am
cars: Vr 5.0 statesman vr exec 5.0 turbo vy clubsport

Re: Help Tuning VT304 with Supercharger

Post by Wade »

You can see that although I’m now targeting richer at 700mg, in the logs it’s actually around 500-550mg right when it’s coming onto boost.
Attachments
F01CF943-A8D8-4A60-8EC5-648458AD44FB.jpeg
Wade
Posts: 562
Joined: Mon Jul 11, 2016 6:29 am
cars: Vr 5.0 statesman vr exec 5.0 turbo vy clubsport

Re: Help Tuning VT304 with Supercharger

Post by Wade »

Once you know that your commanded afr’s are now matching what your seeing in your logs, than force open loop. Turn off lean cruise and dfco and start fine tuning the fuelling while keeping an eye on knock
Wade
Posts: 562
Joined: Mon Jul 11, 2016 6:29 am
cars: Vr 5.0 statesman vr exec 5.0 turbo vy clubsport

Re: Help Tuning VT304 with Supercharger

Post by Wade »

Once I’m this stage I’ll set the injector multipliers up to 1.000 flat across the range. Get the car to operating temp and start logging
Attachments
112A6A17-5EB7-4D52-B71F-50F4D881FF58.jpeg
Wade
Posts: 562
Joined: Mon Jul 11, 2016 6:29 am
cars: Vr 5.0 statesman vr exec 5.0 turbo vy clubsport

Re: Help Tuning VT304 with Supercharger

Post by Wade »

After playing back the log I check my wideband readings and select both running average and running sample counts across the mg range and look for an average pattern of how much the fuel is out by. So say at 300mg the average across the rpm range is -5% and say at 700mg it’s out by -2%. I than use the injector multiplier spread sheet and pump those numbers in across the whole table and I’ll end up having an injector multiplier that looks more like this. Doing it this way I’ve found I can get the fuelling dialed in within just a couple logs
Attachments
C2482773-3E64-412A-847A-CB40949168BC.jpeg
Wade
Posts: 562
Joined: Mon Jul 11, 2016 6:29 am
cars: Vr 5.0 statesman vr exec 5.0 turbo vy clubsport

Re: Help Tuning VT304 with Supercharger

Post by Wade »

than I’ll hold a lower gear and start doing more wot runs, and repeat. I’ll than have an injector multiplier that looks like this. By this stage your fuelling should be pretty good. Hope this helps. Might not be the right way. But it sure is a fast way and works really well for me
Attachments
3962BABA-C03B-4D63-B7EE-6AB4C8797805.jpeg
VTXU8
Posts: 93
Joined: Sun Dec 17, 2017 9:12 pm

Re: Help Tuning VT304 with Supercharger

Post by VTXU8 »

Hi Wade, thanks so much for your input. Much appreciated.
Im having problems connecting to car. Tuner pro keeps giving me D/A errors and counting. Then after a short time TP5 crashes. Ive checked all the settings in Preferences and all seems fine and BIN matches ADX etc. I didnt have trouble before so this is puzzling me. I have no trouble using OSE Enhanced Flash Tool. I was successful once downloading bin from emulator to tuner pro but now that keeps saying failed to download too. So thats where im at this stage :wall:
Might have to bite the bullet and get the car towed to a tuner shop :sad2:
Post Reply