Injection Timing Assistance Requested

[Higgs Boson]

Scottt28 - I also think I possibly broke your cam calculator? I input numbers and hit calculate, but it wasn't changing anything that I could tell I assume it's supposed to change the numbers up top? Will it also give you new numbers listed below it or is that just an example? Anyway - seems like I just screwed it up...

that wasn't working before either

[jsllc]

I updated this sheet with a Cam Calc. Added delay for fuel travel from injectors to chamber.

[GHuggins]

Amazing what happens when multiple heads come together ^^^ really like this one

[GHuggins]

I know gas as a liquid has certain fixed flow times, but wouldn't fuel vapor get into the cylinder quicker with rpm's? In other words I would think that at 6000 rpms the time to chamber should be less... It was 1:40 AM when you sent me this last one Scott, so assuming that played into it

[jsllc]

I know gas as a liquid has certain fixed flow times, but wouldn't fuel vapor get into the cylinder quicker with rpm's? In other words I would think that at 6000 rpms the time to chamber should be less... It was 1:40 AM when you sent me this last one Scott, so assuming that played into it

It does take less time but more in crank degrees because there is less time between degrees of crank rotation.


FuelTT.jpg

[Ironhydroxide]

I updated this sheet with a Cam Calc. Added delay for fuel travel from injectors to chamber.

i like the Fuel reaching chamber portion, that's off the end of the injection yes? where the last of the fuel reaches the chamber?

Also, where'd the Normal ECT Go, is it no longer relevant?


I also spent a bit of time yesterday. don't take this wrong, but I don't like the plethora of graphs, so most of my work was getting it all in one graph. Here's mine. feel free to steal whatever out of it you want.

INJECTOR TIMING TOOL GEN IV - LS2 02.xls

[GHuggins]

i like the Fuel reaching chamber portion, that's off the end of the injection yes? where the last of the fuel reaches the chamber?

Also, where'd the Normal ECT Go, is it no longer relevant?


I also spent a bit of time yesterday. don't take this wrong, but I don't like the plethora of graphs, so most of my work was getting it all in one graph. Here's mine. feel free to steal whatever out of it you want.

INJECTOR TIMING TOOL GEN IV - LS2 02.xls

Scott divided it up into two pages - check the first one out...

[GHuggins]

It does take less time but more in crank degrees because there is less time between degrees of crank rotation.


FuelTT.jpg

Nice... I would assume a lot of things would change this - air velocity and turbulence in the runner? Enough to make a significant difference - don't know?

[GHuggins]

i like the Fuel reaching chamber portion, that's off the end of the injection yes? where the last of the fuel reaches the chamber?

Also, where'd the Normal ECT Go, is it no longer relevant?


I also spent a bit of time yesterday. don't take this wrong, but I don't like the plethora of graphs, so most of my work was getting it all in one graph. Here's mine. feel free to steal whatever out of it you want.

INJECTOR TIMING TOOL GEN IV - LS2 02.xls

Yours gets a little cluttered for me, but not everyone processes information the same - I'm sure some on here will use this solely... I like the piston distance info - bet if one were to really get in depth with this stuff in a lab environment - this could prove useful...

[Ironhydroxide]

Yours gets a little cluttered for me, but not everyone processes information the same - I'm sure some on here will use this solely... I like the piston distance info - bet if one were to really get in depth with this stuff in a lab environment - this could prove useful...

I don't doubt the guys who build engines from scratch have much more powerful tools at their disposal than what we're making here.

that said, the visualization is key for me, to teach myself what is going on.

some can look at a sheet of numbers and pull out correlations... not I though.

[schpenxel]

i like the Fuel reaching chamber portion, that's off the end of the injection yes? where the last of the fuel reaches the chamber?

Also, where'd the Normal ECT Go, is it no longer relevant?


I also spent a bit of time yesterday. don't take this wrong, but I don't like the plethora of graphs, so most of my work was getting it all in one graph. Here's mine. feel free to steal whatever out of it you want.

INJECTOR TIMING TOOL GEN IV - LS2 02.xls

It is a bit cluttered for me too but it does do a good job of showing what's going on at different RPM's all on one graph, I think anyways

[jsllc]

i like the Fuel reaching chamber portion, that's off the end of the injection yes? where the last of the fuel reaches the chamber?

Also, where'd the Normal ECT Go, is it no longer relevant?


I also spent a bit of time yesterday. don't take this wrong, but I don't like the plethora of graphs, so most of my work was getting it all in one graph. Here's mine. feel free to steal whatever out of it you want.

INJECTOR TIMING TOOL GEN IV - LS2 02.xls

All input is on the first page. ECT is there. Cleaned up all of the graph formatting and added a single graph.

[GHuggins]

Haven't checked this one out yet, but could you possibly put the graphic up above the main inputs table and put the cam calculator below? Then all of the other numbers can be on the second page like they were. Like I said, haven't seen this one yet to see what was changed.

[jsllc]

Haven't checked this one out yet, but could you possibly put the graphic up above the main inputs table and put the cam calculator below? Then all of the other numbers can be on the second page like they were. Like I said, haven't seen this one yet to see what was changed.

Sorry Do not understand. Which graph? There are MANY.

[jsllc]

Haven't checked this one out yet, but could you possibly put the graphic up above the main inputs table and put the cam calculator below? Then all of the other numbers can be on the second page like they were. Like I said, haven't seen this one yet to see what was changed.

Best guess as to what you want.

[GHuggins]

All input is on the first page. ECT is there. Cleaned up all of the graph formatting and added a single graph.

This one is fine Scott - actually like it better than the one posted above... Didn't have a chance to look it over before - should have before I posted... I thought you had turned the multiple black graphics into 1 that you could change the rpm on and it would readjust "it's" parameters for that - didn't know you added a second more progression showing graphic...

Thank You

[GHuggins]

So until further revisions are made - I think this is a good final for the moment? This is the one Scott - Jslic - posted above with everyone's work combined into one...

Looks good everyone - Thank You

[Area47]

So until further revisions are made - I think this is a good final for the moment? This is the one Scott - Jslic - posted above with everyone's work combined into one...

Looks good everyone - Thank You

so does one put in the cam specs into the main fields there and it back calculates the data from there?

[sevinn]

So until further revisions are made - I think this is a good final for the moment? This is the one Scott - Jslic - posted above with everyone's work combined into one...

Looks good everyone - Thank You

So a word of note, in my copy of office 2016, the math didn't work for the valve events when I input my cam specs until I adjusted the formulas to be SUM formulas. It worked fine on google sheets however.

I'm going to look into the rest of the math as well and make sure.

[GHuggins]

So a word of note, in my copy of office 2016, the math didn't work for the valve events when I input my cam specs until I adjusted the formulas to be SUM formulas. It worked fine on google sheets however.

I'm going to look into the rest of the math as well and make sure.

You are correct - it was working fine in an earlier revision... I'm sure Scott will get this straightened out...