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You need to datalog a pull to see where on that table to pull timing
I’d start the timing drop at 4200ish so you include peak torque, that’s where bent rods and many other fun things happen
Peak torque. 4-5k. Above that you can start feeding it back in. That said your plug showed no signs of detonation. If the rest looked like that your tune was fine as it. Quick being lazy and get a WMI kit on it and turn it up. 🫠
You need to datalog a pull to see where on that table to pull timing
I’d start the timing drop at 4200ish so you include peak torque, that’s where bent rods and many other fun things happen
I've got tons of data logs, I configured my timing advance and retard charts to mirror the timing table in HP Tuners plus added a few more cells for the increase in grams.
At this point its not pulling any timing from 2,800 rpm to redline but is there somewhere else I should be looking?
Peak torque. 4-5k. Above that you can start feeding it back in. That said your plug showed no signs of detonation. If the rest looked like that your tune was fine as it. Quick being lazy and get a WMI kit on it and turn it up. 🫠
I'm gonna pull the rest of the plugs today and see how they look.
Could I see detonation on the plugs before see it pull timing in the datalogs?
If so is that how I know I'm on the edge of the tune essentially?
I bought the meth parts from my buddy, just missing the pump and driver for the Cortex, he's camping in Montana for a few weeks so I'm on it lol.
The only thing the logs will tell you is if you're picking up knock. Then you can pull timing around the knock. Plug reading will tell you if you have a problem potentially BEFORE you see knock in a log. That's why plug reading is so important.
The only thing the logs will tell you is if you're picking up knock. Then you can pull timing around the knock. Plug reading will tell you if you have a problem potentially BEFORE you see knock in a log. That's why plug reading is so important.
That's great to know because I assumed that if I had knock issues that the data log would pick it up, but I was always concerned that by the time I picked it up in the data log that it would be too late to prevent damage.
Posting pics of the plugs now, there's some interesting things to see.
Pulled all the plugs this morning, started on the driver's bank and then moved over to the passenger bank.
Be very curious to get some feedback, I didn't see any detonation on any of the plugs, some of the timing marks seemed to move around between plugs which I find very interesting.
Heat range seemed pretty consistent, only looked like it got into the first thread at most.
Been trying to think of a spot where I can make rips and swap out plugs without being too risky because I'd really like to compare between these plugs and a fresh set. Plug 1 1/3 Plug 1 2/3 Plug 1 3/3 Plug 2 1/3 Plug 2 2/3 Plug 2 3/3 Plug 3 1/3 Plug 3 2/3 Plug 3/3 Plug 4 1/3 Plug 4 2/3 Plug 4 3/3 Plug 5 1/3 Plug 5 2/3 Plug 5 3/3 Plug 6 1/3 Plug 6 2/3 Plug 6 3/3 Plug 7 1/3 Plug 7 2/3 Plug 7 3/3 Plug 8 1/3 Plug 8 2/3 Plug 8 3/3
Cant tell heat range for crap with that anti-seize as was already mentioned. However, it does look like cylinders 7 and 8 are starting to show signs of slight black speckling on the porcelain. It's always tough to tell over a computer monitor, but it looked like there were a few on both cylinders. Given that they're the rear 2 cylinders, not really surprising that they're going to get more air than the rest as that's been proven many times over. If you know which injectors you have that flow the most I'd stick those in the back 2 cylinders. Then either pull a degree or 2 as FrceFed suggested or simply finish the WMI kit.
Cant tell heat range for crap with that anti-seize as was already mentioned. However, it does look like cylinders 7 and 8 are starting to show signs of slight black speckling on the porcelain. It's always tough to tell over a computer monitor, but it looked like there were a few on both cylinders. Given that they're the rear 2 cylinders, not really surprising that they're going to get more air than the rest as that's been proven many times over. If you know which injectors you have that flow the most I'd stick those in the back 2 cylinders. Then either pull a degree or 2 as FrceFed suggested or simply finish the WMI kit.
How do I go about determining which injectors are flowing more than others and in what amounts?
Side note, my tune was a little bit lean in the upper rpm area on the last hit, my tuner has already sent me a tune adding fuel in that area.
Would I still need to move injectors around if the new tune adds more fuel?
Then for timing, I looked at my datalogs and my Cylinder Airmass goes from .74 to 1.15 between 4,000 rpm to 5,000 rpm, is that the area I should pull two degrees from?
You would have had to have flowed injectors and know which was which from the report that came with the injectors. If the tune was lean and it's been corrected that would help, but it'll be tough to reread plugs like that. You could just replace 7 and 8 with fresh plugs and make another hit and check them again. Yes timing in the 4-5k range is where you can pull a couple degrees, then with the 2 new plugs go make a pass.
You would have had to have flowed injectors and know which was which from the report that came with the injectors. If the tune was lean and it's been corrected that would help, but it'll be tough to reread plugs like that. You could just replace 7 and 8 with fresh plugs and make another hit and check them again. Yes timing in the 4-5k range is where you can pull a couple degrees, then with the 2 new plugs go make a pass.
Ah okay, yeah I don't have any of that data unfortunately, injectors were in the car when I bought it.
So regarding the timing, did I interpret this correctly by using the grams/rpm range from my data log to determine where to pull timing from in the timing table at WOT?
If that is correct than I was wondering if I shouldn't pull one degree from the surrounding cells just to smooth it out a little bit?
my preference is to use a datalog trace of a run and adjust the table from there so you can see the timing through the pull. trying to do that strictly with a table can be difficult. it will typically 'follow' boost inversely with a 1-3° dip around peak torque
my preference is to use a datalog trace of a run and adjust the table from there so you can see the timing through the pull. trying to do that strictly with a table can be difficult. it will typically 'follow' boost inversely with a 1-3° dip around peak torque
How do you do a data log trace for that?
Would I set up an actual timing chart (like the advance/retard chart) using the same parameters then I can see where timing is actually at?
Correct - I think out of the box the histogram is set up with kpa/rpm and shows timing change the kpa to airmass and then it'll follow the table in the computer and you'll know where you are at.
Does it even live in the 4000-5000rpm range? At WOT my converter goes to 5400rpm so it has very little load on it in that area. Overall your table is much spicier than mine, but it might be needed to get that turbine rolling.
Correct - I think out of the box the histogram is set up with kpa/rpm and shows timing change the kpa to airmass and then it'll follow the table in the computer and you'll know where you are at.
Does it even live in the 4000-5000rpm range? At WOT my converter goes to 5400rpm so it has very little load on it in that area. Overall your table is much spicier than mine, but it might be needed to get that turbine rolling.
See and I was just thinking about that, its only in the 4K-5K range in first gear, if I shift no earlier than 7,000 rpm, by the time everything happens its closer to 7,400 rpm and my rpm drops back into the 5,800-5,900-rpm range for both second and third.
Correct - I think out of the box the histogram is set up with kpa/rpm and shows timing change the kpa to airmass and then it'll follow the table in the computer and you'll know where you are at.
Does it even live in the 4000-5000rpm range? At WOT my converter goes to 5400rpm so it has very little load on it in that area. Overall your table is much spicier than mine, but it might be needed to get that turbine rolling.
I created a histogram using rpm and grams and the square is moving around but no numbers are populating.
I used the actual spark input, is there a different one I should be using?
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