At 7500 rpm, for instance, I’m consistently logging a pfi maximum value of 12 ms. The time it takes for 2 revolutions is 16 ms so I’m missing out on a solid 25%.
Type: Posts; User: engineermike
At 7500 rpm, for instance, I’m consistently logging a pfi maximum value of 12 ms. The time it takes for 2 revolutions is 16 ms so I’m missing out on a solid 25%.
Thaks for taking the time to look that up, Eric.
So the pulsewidth offsets, I'm assuming this is something like calculated (or specified) time to open and close the injector? Is that hard-coded...
Does anyone know the PCM algorithm that calculates the logged parameter "PFI Injector Maximum Pulse"? I know it's not the traditional calculation of 2*60*1000/rpm, but it appears to be related to...
The cylinder pressure limit is for timing only.
The throttle doesn't go wide open until 5500 rpm. At that point it appears as though TIP desired = TIP actual, and with the throttle wide open it's all you're going to get at that TIP. If you want...
If you post a WOT log, then add Borderline Timing, MBT, Timing, and Knock Advance and make sure the data rate is high. If you're running E85 then you can generally add a lot to the borderline tables...
Which is what I said, minus the theoretical part. Theoretical means it can't or hasn't been proven. MBT can and has easily been proven. By definition, it is NOT just a theoretical number.
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I love the flex feature but I’m afraid hpt isn’t the best software to make it work.
Be careful with flex on these. There are 9 parameters for fuel system fuel volumes that are typically defaulted to 0 lb in the m6g. The problem is that when switching fuels on a fillup, the logic...
So you have 3 issues remaining? Occasional bog on 1-2 shift, dying when coming to a stop, and low WOT timing?
If the tune is hacked together, it might make sense reverting back to a stock file...
MBT is a physical characteristic of the engine, being the timing at which it's most efficient and makes the most torque. It's not just some theoretical number. The tune should be calibrated to...
Im assuming you mean max load, not just load in general which is always changing. At any rate, if you lower compression to, say, 9/1 then MBT will be much higher. If the MBT in the table isn't...
The mbt tables really shouldn’t be modified much from stock unless you make some major change to the engine like compression ratio or cam profiles. Some tuners just raise all the mbt tables by some...
This sounds just like shift torque modulation. You can log more stuff to learn more about whats happening but basically its cutting spark to achieve a target shift torque. You can change the shift...
My 2020 does but it’s a Roush os.
The pcm doesnt have the ability to sense or calculate non-baro throttle inlet pressure. It thinks it’s only 0 psi there, so it opens the throttle appropriately but inadvertently lets all the boost...
If you?re sure of your injector data it?s pretty straight forward. You just have to modify the maf transfer function and your goal is for the average fuel trim to be close to 0. You can make some...
You could try using the slip tables again but set the slip to 0 rpm in each gear.
Rob, the method I posted above prevents it from using S (spark retard) and A (air/fuel) to modulate torque. It has to resort to I (ignition cut) to reduce shift torque. I’ve tested it and it works...
Yep, my mistake....fixed it.
Thanks veefour!
I’m looking for a manual one.
You basically have to force the SAI system to skip S and A and go straight to I. To do this, you'd have to set Shift Modulation to 1.0 in table 33458 (spark only torque ratio) and confirm Shift...
I dunno man, you didn't list the shift points in the first post in the list of tables that you adjusted. I opened the file and all the shift points are set to 7000-7450.
Yes, I’ve done it.