Noob spark table question
#4
Keep in mind that a naturally aspirated engine can only go up to 101.3kPa @ sea level, or whatever the atmospheric pressure is at your elevation, and from 0-100kPa the last two maps are relatively similar, with the middle one a little more aggressive and scaled for boost.
Idk why the last spark table only goes to 6400 rpm and has funky rpm intervals though.. where did you get it? It looks like it's for a supercharged v8.
Idk why the last spark table only goes to 6400 rpm and has funky rpm intervals though.. where did you get it? It looks like it's for a supercharged v8.
Last edited by Cococarbine3; 11-28-2010 at 08:39 PM.
#10
Boost Czar
iTrader: (62)
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,490
Total Cats: 4,079
And if you look at the 100kPa row, it's very similar to the oem map, a little advance in lower RPMs and less advanced in upper rpms...but not by much.
I know DIYautotune found that, N/A, they make best power on the map they provide without risking too much advance. So around the lower 30s should suffice for most people...going more advance probably nets no extra power. They have the dyno, I don't.
I know DIYautotune found that, N/A, they make best power on the map they provide without risking too much advance. So around the lower 30s should suffice for most people...going more advance probably nets no extra power. They have the dyno, I don't.
#11
However, since the second table actually goes up to about 5psi (if I'm not deluded) then it would work as well.
What I'm wondering is why the stock table goes all the way up to 230 kpa which is way, way more boost than I'm capable of. I guess I'm going to do my own which tops out with my own measly 5 psi.
A lot to learn, though it's beginning to make sense. One of these first days, there'll be one of these things that tunes itself without even having to attach laptop.
Need to go logging and maybe smooth out some of the rough spots. I'm pretty sure they didn't do this map in cold weather! ;-)
#12
Boost Czar
iTrader: (62)
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,490
Total Cats: 4,079
You'll have to rework the entire map if you ever run more than 5psi. Just leave it scaled to 230kPa and tune within your window. There's no real loss of resolution since there isn't much change happening between rows/columns.
#19
Boost Czar
iTrader: (62)
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,490
Total Cats: 4,079
no. you intially lock your timing at 10° when you install your MS to simply sync the CAS signal to the MS. it's an arbitrary number. You could set it to 0° or 20° and do the same.
on their map, they like to idle at 17°, and thus is why that area is all 17°. They also like to idle at 13.0:1.
on their map, they like to idle at 17°, and thus is why that area is all 17°. They also like to idle at 13.0:1.