RPM B3 ls7 cam events for EOIT

[Matt_lq4]

Been using the Race Proven Motorsports RPM B3 cam for a while on my LS7 but lately found Cringer's EOIT program and wanted to reduce the raw fuel smell at idle.
I could reduce/increase the boundary (Ecm 13336) that currently says 540*, until fuel trims or wideband reading shows richer, but seeing if there is a less trial and error approach if you have cam data.

Unfortunately with my cam, I didn't get a card but just a piece of paper with
Camshaft Part: 25-TSPCustomCam-LS
Duration .050 intake 243 exhaust 259
Valve lift @1.8 for intake and exhaust 0.666
Lobe separation 114
ICL 111

[Cringer]

You should move Boundary back anyway. Then dial it in with Normal ECT to minimize the smell. 243*@.050" is a pretty big cam.

[Matt_lq4]

Thank you, I'll keep playing with those settings.
I did actually move injection boundary back to 500 at idle last year and the fuel smell was reduced, I just wish I could see what it "should " be at theoretically with your calculator and the others. Lack of a cam card is currently hindering that goal haha.

My concern with adjusting the ECT portion, is that I don't want the injection timing changed anywhere but below 1700 rpm (for cruise to minimize bucking and near 900 rpm idle to minimize smell), so the ECT adjustment sounds like a global change for every RPM.

Perhaps I can dial in the RPM (ECM 13338) portion instead, to target the RPM areas I mentioned. Boundary table is also in RPM though, can I just focus on one of the RPM tables and leave the warmed up ECT alone at 110 in ECM 13337?

If I'm only interested in the proper injection timing at a fully warmed up coolant temp, at lower RPMs, is there anything wrong with strictly adjusting only ECM 13336 Injection Boundary?

[Cringer]

Thank you, I'll keep playing with those settings.
I did actually move injection boundary back to 500 at idle last year and the fuel smell was reduced, I just wish I could see what it "should " be at theoretically with your calculator and the others. Lack of a cam card is currently hindering that goal haha.

My concern with adjusting the ECT portion, is that I don't want the injection timing changed anywhere but below 1700 rpm (for cruise to minimize bucking and near 900 rpm idle to minimize smell), so the ECT adjustment sounds like a global change for every RPM.

Perhaps I can dial in the RPM (ECM 13338) portion instead, to target the RPM areas I mentioned. Boundary table is also in RPM though, can I just focus on one of the RPM tables and leave the warmed up ECT alone at 110 in ECM 13337?

If I'm only interested in the proper injection timing at a fully warmed up coolant temp, at lower RPMs, is there anything wrong with strictly adjusting only ECM 13336 Injection Boundary?

Yes adjust RPM via Boundary, don't make it flat. N. ECT obviously is not adjustable by RPM.

For your cam, I would suggest these valve events as a starting point (and this is an educated guess based on a standard ramp rate and an unknown ECL, so it is not perfect, but close enough):
IVO: 36
IVC: 78
EVO: 90
EVC: 38

This results in .006" timings of:
In Dur: 294
Ex Dur: 308
ICL: 111
ECL: 116
LSA: 114

This means EVC occurs at 398 and IVC occurs at 618 in Boundary degrees. For idle and low RPM you'll want to probably want to target SOIT around 390-395 and for 4000+ rpms target EOIT around 600. That is the basics anyway.

[Cringer]

No, not like that. Did you watch this video? It goes over the math. You define EOIT with the tables HPT exposes (and accept a few in the background you cannot see) and SOIT is variable based on the injector pulse width.
https://youtu.be/FmdJOOUUqQg

[Matt_lq4]

This is as far as I got so far. I had to cut off some of the pictures to shrink their file size.
For fun I went to Output:Raw Data, although I realize it's too early, just to see. Car itself is in storage so I can't do any testing yet to gather the rest of the data. Thanks for your suggestions.

[Cringer]

Did you plug in the IPW into the tool?
Do you have the latest version 1.6.2?

[Matt_lq4]

Going through the video now, trying to find the part about the Input:Scanner portion and what kind of driving I'm supposed to do for this datalog, to gather the data in the scanner.
The PE portion makes sense, full throttle, but for the CL portion, assuming a few minutes at idle and part throttle with a fully warmed up vehicle, is best.

Yes I see your scanner layout for this data in the video. Version 1.6.2 yes

I posted 3 pictures above of what I entered so far into the tool.
Screenshot_20250209_005248_YouTube.jpg

[Matt_lq4]

I initially thought this tool would take my stock injection tables and aftermarket cam specs, and generate new Boundary angles.

However, is the addition of the scanner data and CL and PE data gathering, for the tool to dial in more accurate final EOIT tables for the engine you're implementing this on?

[LS ROB]

I initially thought this tool would take my stock injection tables and aftermarket cam specs, and generate new Boundary angles.

However, is the addition of the scanner data and CL and PE data gathering, for the tool to dial in more accurate final EOIT tables for the engine you're implementing this on?

I've been following along here and I believe this tool tells you where you are currently and by using the graph, you can get close to where you need to be spraying. Maybe someone more knowledgeable can tell us if we need to be spraying after or before the IV closes?

[Matt_lq4]

I've been following along here and I believe this tool tells you where you are currently and by using the graph, you can get close to where you need to be spraying. Maybe someone more knowledgeable can tell us if we need to be spraying after or before the IV closes?

I hope Cringer chimes in as I didn't see any explanation in his videos, of what the scanner data brings to the ultimate end result. Hard to use a tool without any clarification from the creator. Paging Cringer!
It makes perfect sense that it's to dial in the final EOIT and SOIT values that tool spits out. While without scanner data, it's more of an initial guess. We use the scanner to gather data for adjustments, so it seems obvious but nobody has clarified on this injection timing tool.

My car is in storage so I can't do any scanner data gathering, so this is what the tool gave me without scanner data. Screenshot_20250209_214133_Gallery.jpg

[LS ROB]

That's very similar to what i have came up with. I have the TSP stage 2 and the cam events are very similar.


eoit asst..jpg

[Matt_lq4]

He estimated the valve events on my cam but just for reference, it's 243/259 114 LSA, 111 ICL. I was never provided a cam card from RPM.

[LS ROB]

I see. Im 234/246 115+3 @.050

I think I need to target around 425ish but but i'll follow along with your thread and see how it goes.

[Cringer]

I initially thought this tool would take my stock injection tables and aftermarket cam specs, and generate new Boundary angles.

However, is the addition of the scanner data and CL and PE data gathering, for the tool to dial in more accurate final EOIT tables for the engine you're implementing this on?

If you hire 1000 tuners to tune your car you will end up with 1000 unique tunes. Everyone has a different solution. Is there one single best tune? No. You'd think oem tunes would be perfect. But they are not.

So what does this tool do? Does it have the audacity to tell you what to do and what is perfect? Again , no.

Look at all the data points you input into the tool from the editor, scanner, and cam/crank data. It ties all these things together and brings synergy to all of them where HPT cannot. It shows you what is going on and shows you the impact of your changes. It won't tune for you, but allows you to tune better.

EOIT is a balance of performance, emissions, and throttle response. At idle you can get away with spraying a little before EVC. Everything else depends on your combo, and dare I say, how well the rest of the tune is dialed in.

It is up to you to tune it.

Edit: and most professional tuners won't even tune EOIT at all

[Matt_lq4]

If you hire 1000 tuners to tune your car you will end up with 1000 unique tunes. Everyone has a different solution. Is there one single best tune? No. You'd think oem tunes would be perfect. But they are not.

So what does this tool do? Does it have the audacity to tell you what to do and what is perfect? Again , no.

Look at all the data points you input into the tool from the editor, scanner, and cam/crank data. It ties all these things together and brings synergy to all of them where HPT cannot. It shows you what is going on and shows you the impact of your changes. It won't tune for you, but allows you to tune better.

EOIT is a balance of performance, emissions, and throttle response. At idle you can get away with spraying a little before EVC. Everything else depends on your combo, and dare I say, how well the rest of the tune is dialed in.

It is up to you to tune it.

Can you address the question I posed a few times about the scanner data gathering? That's literally my only question, not questioning anything else about the tool. Trying to understand what the scanner data will be providing, help me understand. It's frustrating why that hasn't been answered.

To make it simpler, I'll lay it out here:

1.) How do you want us to gather the CL and PE scanner data for this pulsewidth vs rpm scanner table....CL is to be gathered at idle, short cruise? Explain your criteria to gather accurate info that will then paste into the Editor portion of your tool.

2.) Do I keep repeating the process of gathering pulsewidth data from scanner data and plopping it into the tool, until a certain point?. Usually trims train us to stop the tuning process once we get to nearly no error versus commanded....so trying to apply that here to understand how far I keep going despite this not being a fuel trim scenario.

[Cringer]

You need it so the tool can calc the SOI.

[Matt_lq4]

I'm about to give up on this lol, I can't make my questions any easier.

[Cringer]

Input all the data into the "Editor" tab.
Then go to the "Scanner" tab and click the COLUMN AXIS COPY LABELS link.
Go to the scanner and create a 2D graph using those RPM break points and put IPW as the data point
You will need to two graphs in the end. One for CL and one for PE, so you will have a filter for each.

How many times you repeat is up to you. Again, do you have a dyno, emissions equipment, Draggy, a smell target, or throttle response feel? This is the art of tuning.