Turbo 4.8 final tune help

[edcmat-l1]

You are asking a lot to expect people to use clear and concise language. Doesn't happen much anymore, and people get upset if you expect them to.

Agreed.

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So yes, I miss spoke on the first post and forgot I didn’t pull the tune from the truck. This is the same tune that the tuner loaded on the truck and made a backup file on the thumb drive. I realize he didn’t do a great job and all I’m asking for is a little guidance on what looks jacked and needs changed. I have updated the injector data from what he had and I’m sure the VE tables are jacked.

[[email protected]]

Ok, so I found what I think is the correct injector date and slight change to timing. I uploaded it to the truck and it seems to better but still not great. I added the adjusted tune and a log file if anyone would help me out. I am not sure where to adjust the VE table to.test (HPD) C-10 4.8 stg2 TH350 turbo 10.4.23.V5.hptlog2 10.4.23.hpltest (HPD) C-10 4.8 stg2 TH350 turbo 10.4.23.V5.hptlog2 10.4.23.hpl

[SiriusC1024]

Please read the part number off the injector and post it here. It's very important to get it right.

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Please read the part number off the injector and post it here. It's very important to get it right.

[SiriusC1024]

Missed a 3. It's 12613412. Data is correct for that.

I went ahead and created a base file for you. This isn't a full tune, but it's a step in the right direction. You'll still need to work on it.

This is all assuming that the fuel pump can keep up and that a 1:1 regulator has been installed.

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Awesome. Thank you I’ll give it try tomorrow.

[SiriusC1024]

Take it easy. Keep an eye on AFR and knock events.

[edcmat-l1]

Missed a 3. It's 12613412. Data is correct for that.

I went ahead and created a base file for you. This isn't a full tune, but it's a step in the right direction. You'll still need to work on it.

This is all assuming that the fuel pump can keep up and that a 1:1 regulator has been installed.

Hey buddy I'm not going to hammer you, but you need to tell people you're a novice and you may or may not know wtf you're doing. Especially on forced induction stuff where someone may unknowingly throw your file in, go out and hammer on it and melt their shit down.

PE is setup for NA application. If you missed on the VE accuracy you've got him setup for catastrophic failure. And you haven't done enough of these to know if you missed or not.

You're also starting out with too much timing in it initially until you know how much boost it's making and what the final WOT fueling is like.

[SiriusC1024]

Thank you for the constructive criticism.

Isn't it true that the PE table is valid for 0-100kpa then the Boost Enrichment takes over? It's a little on the rich side, but the good thing about that is more padding to keep AFR from going lean until VE gets dialed in.
boost enrich.png

I didn't really touch timing. I just kept the Low he had but copied it into High as well. The High table was definitely dangerous. Low looked about right to me. It appears to be the stock Low timing curve that has been continued into the high cylair regions, decreasing roughly 1 degree off MBT (in the high loads) for each 1lb boost, correct? He shouldn't be setup to exceed 14psi on a 2 bar tune anyway.

Those are questions I'm asking as discussion btw. Tell me if I'm wrong it's ok.

I did say ease into it and keep an eye on AFR and KR. Hopefully OP understood that means don't lay the hammer down. Work up to full power. It's a baseline that should close enough that he could notice a problem trending towards dangerous and make corrections.

To further safety I did modify IAT spark, restored Knock Recovery Rate, setup Injection Timing, and re-enabled the Complex Cylinder Charge Model.

[edcmat-l1]

Thank you for the constructive criticism.

Isn't it true that the PE table is valid for 0-100kpa then the Boost Enrichment takes over? It's a little on the rich side, but the good thing about that is more padding to keep AFR from going lean until VE gets dialed in.

Yep and I'm here to apologize to you. I did not look at the boost PE. I set the RPM PE table up for boost. I don't depend on the PCM switching from one to the other.

I'd pull 3 degrees until you both figure out how much boost it's gonna make.

If this is one of them "On 3" kits the waste gates are too small and they repeatedly suffer from runaway boost.

[SiriusC1024]

Oh ok thanks for checking into it anyway. It's good to have multiple eyes on this kind of stuff.

Pulling 3 degrees is a good idea. If I was starting from scratch I'd have 8 in place of 13.67.

That is a good point about the wastegate. I'd like to emphasize to OP - EASE INTO IT. Watch your wideband. Go up a little at a time and review your logs each run.

Also, as a good first exercise, implement edcmat's 3 degrees timing removal and let's see what you come up with.

[SiriusC1024]

Did you see the Min Fuel Qual? Who taught me that

[edcmat-l1]

Did you see the Min Fuel Qual? Who taught me that

Shouldn't need to change it for those injectors. At least not as low as you got it. Stock setting should be .032 and for factory FF injectors I'm pretty sure it's .028. Leaving it stock will work fine.

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Thanks everyone for the assistance. I am by no means a tuner just trying to fix what the guy that said he tuned it did. I’ll pull some timing and keep an eye on AFR.