TTS Cranking Fuel Table adjustment

[bbrowncods]

I have 6.0 gm/sec injectors, so the "millisecond" values in most calibrations are too high.  Also the CI for my setup is 98 vs most cals of 96. So here is what I did, let me know if you think there is a better way.

1. Orig cranking ms value = 70; Orig injector = 3.91gms/sec, therefore 70x3.91= 273.7 ( since I am going to convert right back to ms, I am bypassing the conversion from seconds to milliseconds)
2. 273.7/96ci = 2.85/ci (orig fuel per ci displacement)
3. 2.85x98ci = 279.4 (orig fuel adjusted for my engine size)
4. 279.4 / 6.0 gm/s = 46.5 (new cranking ms value)
5. replace 70 for 46.5.

I did this for all the temperatures in the table.

[FLTRI]

Nothing wrong with your theory. May not pan out exactly like you assume IF you have a much larger CI engine than stock.
You may find you will need to put some back in if it doesn't start easily after the change.
HTH,
Bob

[hrdtail78]

What injector size do you have in your cal?  Did you change it or leave it alone?

[rbabos]

Way too much math happening here. 5-10% drop would likely get your there.
Ron

[Steve Cole]

AS Bob said should be close but may need a few adjustments. I do it just a little different

Old Inj/ New inj = %change

3.91/6.0=0.6516

Take this and multiply it by the mSec and you have the new value. This gets you close enough for a new injector size change. I do not worry about small displacement changes as your going to need to fine tune th evalues o nce running anyways.

[bbrowncods]

What injector size do you have in your cal?  Did you change it or leave it alone?

I put in the tuning constants 6.0.  V-tunes are going well.

Thanks for the inputs.

Steve, your method is a lot simpler.  Thanks!