03 LB7 Build

LB7StillAlive

LB7StillAlive

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Bdsankey said:
I'd say you're toward the upper end of those injectors in terms of peak efficiency, 2400us is already chasing the piston down with fuel.

Those numbers are about where I'd expect the setup to be "happy"! I'd bet around 2500-2600us is what it would take to break 800whp.
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I was at 2300us on Version 3 and it didn’t really smoke under WOT. They turned it up to around 2400us because they felt it had more to give. I suspect you’re correct on it needing 2500+ for 800+. They made mention 2800 would be the absolute limit, but not recommended. Target of the build was to be 750-800whp as a street and light tow vehicle. For now, it’s more than enough to keep me content . I was surprised at the torque, only expected 1300-1400.

The 600 numbers were the dyno runs in Tune 3. It’s a bit nerve racking to watch a truck dyno…sounds like it’s going to explode at any moment, haha.
 
Bdsankey

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LB7StillAlive said:
I was at 2300us on Version 3 and it didn’t really smoke under WOT. They turned it up to around 2400us because they felt it had more to give. I suspect you’re correct on it needing 2500+ for 800+. They made mention 2800 would be the absolute limit, but not recommended. Target of the build was to be 750-800whp as a street and light tow vehicle. For now, it’s more than enough to keep me content . I was surprised at the torque, only expected 1300-1400.

The 600 numbers were the dyno runs in Tune 3. It’s a bit nerve racking to watch a truck dyno…sounds like it’s going to explode at any moment, haha.
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My personal opinion would be to leave it alone and enjoy. It sounds quite safe and efficient tuning wise.
 
N2BRK

N2BRK

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You don’t think pressure was dropping too much in that short log file?
 
Bdsankey

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LB7StillAlive said:
I needed to pull a log for tune 5 validation and figured I'd share it given one asked a few responses back. I needed to ZIP it in order to attach it.

@Bdsankey - Received the CalTracs, thank you very much. I'll hopefully get those installed this weekend.
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N2BRK said:
You don’t think pressure was dropping too much in that short log file?
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If you're talking about the log above, I hadn't looked at it until now. It's dropping a fair bit of rail BUT it looks like a tune revision will fix that no problem. It's sitting at ~960mA on the reg, there's still injection pump left and it also recovers toward the end of the pull which indicates that the initial ramp/how quick the ECM responds needs to be adjusted.

Relatively straightforward stuff. While Blake and I don't see eye-to-eye, he is a great tuner who can easily correct this file. It is possible that the updated file that's in the truck now and this issue doesn't exist but we would need @LB7StillAlive to tell us if there's been a revision since this log was uploaded.
 
N2BRK

N2BRK

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I didn't realize that wasn't the same tune that was dynoed. What you are saying makes total sense.
 
LB7StillAlive

LB7StillAlive

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Bdsankey said:
If you're talking about the log above, I hadn't looked at it until now. It's dropping a fair bit of rail BUT it looks like a tune revision will fix that no problem. It's sitting at ~960mA on the reg, there's still injection pump left and it also recovers toward the end of the pull which indicates that the initial ramp/how quick the ECM responds needs to be adjusted.

Relatively straightforward stuff. While Blake and I don't see eye-to-eye, he is a great tuner who can easily correct this file. It is possible that the updated file that's in the truck now and this issue doesn't exist but we would need @LB7StillAlive to tell us if there's been a revision since this log was uploaded.
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Tune File 0041, is the current Version 4 tune in the truck and was the tune file used for the Dyno pull.

Last Friday I submitted two log files for review by Blake, that was one of them. I suspect I’ll get an update this week or at least feedback on his review of them. I’ll post the second one, and will try to look at it and see what you all see (although unlikely to be successful). I appreciate you guys looking at it and providing some feedback.

On the monitor it doesn’t show rail loss, but I could understand if the monitor is not as accurate as the AutoCal.

@Bdsankey - I do plan to leave it alone, from a chasing more HP perspective. The build is « Safe » at the current range.
 
Bdsankey

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N2BRK said:
"He's got a good bit of pump left." - said She.
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giphy.gif
 
Bdsankey

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PureHybrid said:
Desired 25k? Weak sauce lol
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On his sensor arrangement I would agree. I forgot he is running a later generation sensor.

That would be a very easy way to gain more injected fuel volume without touching duration. I cannot speak for Exergy but I do know Dynomite will warranty them up to 32ksi on all of their solenoid injectors for 01-10 GM.
 
LB7StillAlive

LB7StillAlive

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N2BRK said:
View attachment 13462210min lunch brake at work. lol. But at first blush…
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You taught me something. I was wondering how I could see the pulse width in the new rev. I now see it’s 2350. I suspect I can custom set the PIDs I see when I open the tune.

Right now all I see is RPM and Fuel Rail i believe. The bottom two charts are empty when I open EFI Live. In clicking around I believe I saw where I can add PIDs…I’ll ask some more questions if I’m unable to figure it out. Work computer doesn’t have EFI Live…yet. Safety protocols won’t allow the install, which I’m requesting to have bypassed .
 
Bdsankey

Bdsankey

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LB7StillAlive said:
You taught me something. I was wondering how I could see the pulse width in the new rev. I now see it’s 2350. I suspect I can custom set the PIDs I see when I open the tune.

Right now all I see is RPM and Fuel Rail i believe. The bottom two charts are empty when I open EFI Live. In clicking around I believe I saw where I can add PIDs…I’ll ask some more questions if I’m unable to figure it out. Work computer doesn’t have EFI Live…yet. Safety protocols won’t allow the install, which I’m requesting to have bypassed .
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You can right click and hit "select PID" to view all of the available PIDs that you recorded.


If that PID has a gold star that means it is the PID shown in the box you right clicked on. If that PID shows a green check that means it is shown somewhere on the graph already.


I would be shocked if you didn't pick up some HP/TQ by simply killing the initial rail pressure dip.
 
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