llxkevinxll
10+ Year Contributor
- 536
- 271
- Jan 29, 2012
-
Milwaukee,
Wisconsin
1). No boost, vac, or exhaust leaks.
None
2). Verify mechanical timing.
Timed
3). Verify base timing
5deg factory spec
4). Ignition system
NGK BR7ES @ 0.020", new MSD wires, ~1500 miles on new OEM PTU/Coil pack.
5). Motor health
~1500 miles on build, have not taken measurements
6). Basic throttle body adjustments.
BISS is slightly out of adjustment, base TPS voltage is set
7). Compression ratio
8.5:1 JEs, unsure on calculated CR (unknown HG thickness or chamber volume)
8). Wiring and sensors
Harness was rebuilt with all new Sheridan Engineering connects ~4k miles ago.
9). No DTC/CEL codes
None
10). Electrical system
ACDelco GM Alternator, rewired. ~50 miles on new alternator. Optima Red Top in trunk.
11). Base fuel pressure and injector values
43.5 psi with car on and vac line attached (so a bit higher than factory). FIC 1650s with dead times from data sheet set.
12). Properly calibrated and configured wideband sensor
Innovate MTX-L, recal ~500 miles ago
13). Type of fuel
Marathon/Citgo 93. ~9.8% on the GM flex sensor
Hey guys, I was hoping to have some second opinions on my timing map and the knock readings I am seeing. Just want to know if I am seeing some sensor oddities or if the knock I am registering is likely real. I have attached a log snippet of a pull. Pardon the throttle position, the not particularly smooth country road isn't the best tuning surface. Am I mistaken thinking 1.1 deg of total timing at 6500 rpm is odd? That seems exceedingly low but I really haven't tuned other DSMs. Most of my experience is N/A SBC stuff which doesn't quite translate for this particular question. Any comments/opinions welcome. Just want to get a better grasp on what I am seeing.
None
2). Verify mechanical timing.
Timed
3). Verify base timing
5deg factory spec
4). Ignition system
NGK BR7ES @ 0.020", new MSD wires, ~1500 miles on new OEM PTU/Coil pack.
5). Motor health
~1500 miles on build, have not taken measurements
6). Basic throttle body adjustments.
BISS is slightly out of adjustment, base TPS voltage is set
7). Compression ratio
8.5:1 JEs, unsure on calculated CR (unknown HG thickness or chamber volume)
8). Wiring and sensors
Harness was rebuilt with all new Sheridan Engineering connects ~4k miles ago.
9). No DTC/CEL codes
None
10). Electrical system
ACDelco GM Alternator, rewired. ~50 miles on new alternator. Optima Red Top in trunk.
11). Base fuel pressure and injector values
43.5 psi with car on and vac line attached (so a bit higher than factory). FIC 1650s with dead times from data sheet set.
12). Properly calibrated and configured wideband sensor
Innovate MTX-L, recal ~500 miles ago
13). Type of fuel
Marathon/Citgo 93. ~9.8% on the GM flex sensor
Hey guys, I was hoping to have some second opinions on my timing map and the knock readings I am seeing. Just want to know if I am seeing some sensor oddities or if the knock I am registering is likely real. I have attached a log snippet of a pull. Pardon the throttle position, the not particularly smooth country road isn't the best tuning surface. Am I mistaken thinking 1.1 deg of total timing at 6500 rpm is odd? That seems exceedingly low but I really haven't tuned other DSMs. Most of my experience is N/A SBC stuff which doesn't quite translate for this particular question. Any comments/opinions welcome. Just want to get a better grasp on what I am seeing.