A few spark questions perhaps?

[Bruce Melton]

For those of us with older LS1s, the stock 02 Z06 HO spark table is an interesting benchmark. (02Z _left) This is a good starting point it seems.

In that the cammed cars seem "like" to idle @ ~24* and at higher MAP range it would seem that blending the 24* timing into that 02Z table would avoid holes when combined with matching Park tables? The only anticipated downside is a bit of tip in rattle perhaps, which could be corrected as necessary. I attach a proposed HO table below for comment. (prop_right)

If this works, the ultimate spark in the lower right of the table could be bumped in ~2* steps on a dyno to maximize power and approach KR.
I am hearing that larger displacement, free flowing, cammed LSs are gaining power up to almost 30*.

Sanity checks encouraged.

[billyjo]

Does all of this apply to a DBW set up as well? My tabel 5916 is set to a value of 1.2% which matches what was being said about the stock position. But when I log TP% at idle it is around 7.5% (I have a LS2 throttle body) but doesn't that mean that without changing the 5916 value to match my TP% that I won't be using the base spark tables?

[Bruce Melton]

Does all of this apply to a DBW set up as well? My tabel 5916 is set to a value of 1.2% which matches what was being said about the stock position. But when I log TP% at idle it is around 7.5% (I have a LS2 throttle body) but doesn't that mean that without changing the 5916 value to match my TP% that I won't be using the base spark tables?

You might want to change B4349 to .0157.

http://efiforum.iqd.co.nz/showthread...ighlight=b4349

[billyjo]

Did you get that number from 90/85? What will this do for me and are there any other tables that should be changed?

Thanks,

Bill