Mustang605

iTrader: (13)

I should be firing my car tomorrow..I'm good with tuning timing curves & what not...I've been reading for hours & searching the web on tuning MAP for advanced timing & all that & I'm still lost & clueless...any help would be greatly appreciated...& since the MAP adds timing should I leave my timing where I would usually set it @ without a map or have it lower than usual since the MAP will be set to add timing? & graph posted would be great

ZONES89RS

iTrader: (25)

I dont run one, my timing is pretty aggressive, so i think it would just be too much with it anyway.

forcd ind

iTrader: (7)

its been a while since i messed with the map graph, but i'll try and add something-i used the map because of boost
i didnt use the RPM graph, left it zero'ed out-when you turn the ign on, engine off, the red line on the graph will go to 14.7, which is one atmosphere, which is the pressure all arounf you, always there, you just dont feel it-once you fire the engine, the engine vacume will pull against the 14.7 fig, the red line will go to the left (aprx 2" of vacume will pull the map down one #, if 14" of vacume, you will see the 14.7 map drop to aprx 7 on the graph) so what ever you want your idle timing to be, set it at that point
as you drive easy, vacume will raise, sometimes pulling the red mark further to the left, you could raise the timing more as in cruise-when you hammer it, vacume will drop, the red mark will return to the right and should go to 14.7 if all the vacume is gone, wide open throttle-if running boost, 2 bar map lets say, scale will read to 30, and red mark will go beyond 14.7 (14.7 + boost, say 10#'s, would be 24.7, so you would have your timing sliding lower
i use the 3 dials on large, drive around and see what the #'s are
i fire it with aprx 30 degs, then adjust the timing points based on the map readings-hope this hasnt confused you

overhere

iTrader: (2)

i would like to see one of your timing screen shots. i also use mine with boost and the only way i figured out to do it was with both rpm and map scales.

Mustang605

iTrader: (13)

I'm gonna be running my timing around 32 or 34 so if I add timing with the map is it gonna help that much? I'm also running nitrous @ the track will it have any affect on that with pulling timing & all that? Also is it really worth it because it's gonna cost me 70 bucks for a brand new 1 is it really a necessity or something that helps THAT much? If it's worth it I'll try it if not I wont

S10xGN

iTrader: (11)

For a 1-BAR sensor, you can get one second-hand from a junkyard late model GM and the plug will match the MSD. I set my MAP curve in addition to my base timing curve, most engines need 50+ degrees at light loads and a high AFR to be efficient...

ZONES89RS

iTrader: (25)

With the timing retard built into the box, the MAP advance will do nothing even if it was not armed with the timing retard as it does nothing at WOT.

Mustang605

iTrader: (13)

so your saying you can run 50+ degrees of timing cruising around & not hurt the engine? I see your normal degrees is at 30+ degrees & your MAP is over 10 so when your cruising around it's adding that 10+ degrees? I didn't know you could run that much degrees

ZONES89RS

iTrader: (25)

**** still confused me till i understood the 14.7 atmospheric pressure situation, i will run one on my 86 TA with a turbo.

Mustang605

iTrader: (13)

yea I'm confused as hell...sounds like it may be worth it for cruising around but I just cant understand the damn thing..makes me wanna say f it

S10xGN

iTrader: (11)

Right, lean mixtures at low loads require lots of timing for efficiency. Once you "step into it", the MAP advance goes away (if you're programmed correctly) and the RPM curve takes over.