timing calculator

Im going to mainly be working on the 6.7l cummins diesels, that being said, is there any timing table calculators out there that you guys would recommend? even if if has to be pruchased.

And i also keep seeing the negative(retard timing values in the stock maps being showed and i cant stop to wonder, are those negative numbers for a cruise condition when EGR operation is hapening?

The timing calculator in EFILive is free and works pretty slick on the Cummins. Check that out.

Negative timing at low piston speeds may be to reduce NOx emissions as well as lower engine noise. Its surprising sometimes how little timing is needed to make power at low RPM.

Nick

Thank you much Nick for the reply! Do you know of any very specific to cummins training/course that i can take?

We're talking about doing a cummins worked example early this year, otherwise I do not know of any training course available.

A Cummins specific course would be great!

X2 on the Cummins course, you did a great job and had a lot of nice tips and tricks in the dmax example

I would give that an x3

Ill give that a x4

Any updates on when the Cummins worked example will be released? I'm in the early stages of tuning my CM2200

I dubbed that, You can use my truck as a genie pig. I have a brand overhauled engine with an aftermarket set up and would like to see a cummins version. All that money in this makes me a bit nervous. :-)

Can it be done a simple timing calculator? I do not think so as for to many parameters involved and for the most parts a relation to fuel injection pressure as well.

Best option I think is to create a library or data base with good documented set-up of the engine so you can look for something close to your set-up and take it from there and even then you can be the master or create a disaster overstepping things.