mopar4x4stroker
Well-Known Member
Hey guys, I just installed an E Curve dizzy. Those who don't know, its a digital diz with its own built in ign module. It allows the user a variety of custom tailored advance curves that you set by following a graph with corresponding letters and numbers that you then set with little dials under the cap. You also have the option of vacuum adv. and or locked-out, with a start retard feature that retards the timing below 600rpm.
Im not gonna go into detail on how to set it up, but I will mention that its backwards to a traditional diz. You set your total at idle, lock it down, then pick the advance (retard) curve from the chart.
Anyway, I wasn't even sure how much total my motor could tolerate. So initially I left it locked out at 38 and went for a test drive. I figured it was gonna ping like a sob under light throttle load, but to my surprise it was fine. So I kept adv it 2° until I heard ping. It didn't start to ping until 44° deg. I couldn't believe it. What a different animal. My old diz was a vac adv unit. Not sure what the vac curve was, but it was set up for 318 with 15 initial and 34 mechanical by 3k rpm. Needless to say, it was quite the slouch. I wasn't impressed (almost embarrassed) with the 408.
Anyway, being Im new to ignition tuning, does this seem normal or has my damper slipped? I don't know what kind of mileage I get since I can't go more then a mile w/o getting on the throttle . Would it benefit in economy or performance in a cruise situation with an actual "curve" whether it be mechanical or vac?
I just can't believe it can handle that much lead. The teener couldn't handle anything above 16-17/35-36. That was just de-smoged with cam/intake and mopar elec ignition. I know strokers like a lot of initial, but I didn't think 42° with closed chamber heads, moderate compression, small cam.
Motor is a 408LA with 670 holley SA, home portmatched performer intake, RHS closed chambers with 2.02's, 9.5:1 dished pistons, 470ish 225 duration 112lsa hyd flat with 1.5 RRs.
Vehicle is a W150 pickup, stock 727/TC, 3.23 gears, 30" tires. Weights a hair over 4k
Im not gonna go into detail on how to set it up, but I will mention that its backwards to a traditional diz. You set your total at idle, lock it down, then pick the advance (retard) curve from the chart.
Anyway, I wasn't even sure how much total my motor could tolerate. So initially I left it locked out at 38 and went for a test drive. I figured it was gonna ping like a sob under light throttle load, but to my surprise it was fine. So I kept adv it 2° until I heard ping. It didn't start to ping until 44° deg. I couldn't believe it. What a different animal. My old diz was a vac adv unit. Not sure what the vac curve was, but it was set up for 318 with 15 initial and 34 mechanical by 3k rpm. Needless to say, it was quite the slouch. I wasn't impressed (almost embarrassed) with the 408.
Anyway, being Im new to ignition tuning, does this seem normal or has my damper slipped? I don't know what kind of mileage I get since I can't go more then a mile w/o getting on the throttle . Would it benefit in economy or performance in a cruise situation with an actual "curve" whether it be mechanical or vac?
I just can't believe it can handle that much lead. The teener couldn't handle anything above 16-17/35-36. That was just de-smoged with cam/intake and mopar elec ignition. I know strokers like a lot of initial, but I didn't think 42° with closed chamber heads, moderate compression, small cam.
Motor is a 408LA with 670 holley SA, home portmatched performer intake, RHS closed chambers with 2.02's, 9.5:1 dished pistons, 470ish 225 duration 112lsa hyd flat with 1.5 RRs.
Vehicle is a W150 pickup, stock 727/TC, 3.23 gears, 30" tires. Weights a hair over 4k