What are you carbed naturally aspirated LS guys ending up with on your ignition timing? I know every engine is different but after a few passes it seems like mine doesn’t like much timing and I’m trying to figure out if it really doesn’t like timing or I’ve got some other issue. It is a 440 with 14.25:1 compression and a LLSR, TEA TFS 245 heads, ported Super Victor and Dominator carb. I’ve only got a handful of runs but it seems like 28-30 degrees is where it does the best. Does that seem too low?
440 LSX
I'm at 10.5:1-10.8:1 and 35* got me my best ET/MPH so far.
23x/24x @ .050 HR cam
LS3 heads un-ported
Vic Jr
750 Mighty Demon
Builder of the motor I copied says I need to back down the timing some 30-32.
I need to play with timing and see what it does...
Give it what she wants
23x/24x @ .050 HR cam
LS3 heads un-ported
Vic Jr
750 Mighty Demon
Builder of the motor I copied says I need to back down the timing some 30-32.
I need to play with timing and see what it does...
Give it what she wants
I have mine set at 32°. I've set it as high as 36°, but did not see any improvement. Some guys say they have seen improvements by retarding the timing some after 5000rpm, but I have not tried that.
Are you utilizing the MAP feature or not? If not, double check that the graph for the MAP is zeroed out, and remember to save any changes. After I make changes and save it, I still always exit the program, and then open it back up while still connected to the MSD box and verify that the changes took.
Are you utilizing the MAP feature or not? If not, double check that the graph for the MAP is zeroed out, and remember to save any changes. After I make changes and save it, I still always exit the program, and then open it back up while still connected to the MSD box and verify that the changes took.
403 with 12.0/1 compression and ported ls3 heads best e.t. Was with 35* of timing. Running on e85
The better/more efficient the head and induction, the less timing required. It is not unusual at all to top out at 28° N/A with FI. Anything more just does not provide any benefit on some engines.
People have told me I was wrong, they said my engine has issues. I run 38. The only motor I have hurt was from a huge wheelstand. My car has been 1.23 60ft, The first 6.0 ran 6.24, 6.2 went 5.97. The current 6.0 has been 5.93 with a bad 1.29 60. It has been 6.02 2nd time out this year with about 90 degrees and 96% humidity. 38 degrees timing. I do pull a degree after 5-5500. thinking of trying 2 degrees. Its just so hot out right now, I don't care to do much testing.
~13:1 LS3 stock short, unported (decked .075) stock heads, 237/250 112+4 cam, stock LS3 manifold, made best power at 26* on E85. Tried 30* and everything in between but the motor just wanted 26. Smoothing at 0 30* made similar power but the pull was more jagged so we left it at 26. Thinking about trying a hotter plug, running BR7EF gapped to .026, but it is a hillclimb/track car and wanted to run on the colder side.
I'm running a 2001 LQ4 with stock 317 heads, .649/.600 lift 239/242 dur 110 cam 9.6:1 compression, Holley low rise intake, ProSystems 996 CFM carb 94 octane gas, 18 degrees at 500 rpm ramped up to 27 degrees at 5000 rpm to 6400 rpm then up to 28 degrees to 6600 rpm, then it's back to 27 to 7000 rpm.
32 degrees on mine with a carb. I switched to EFI and it only liked 30 for some reason. not sure why.
I have his first 6.0 cam ..he swapped cams on the 6.2 and uses that same cam on the new 6.0..the 6.0 has more compression now..when he went 6.24 with the old cam and motor he was around 10.5-1 comp..he also cleaned up the heads some if i remember correct..think hes like 12-1 comp now..i know he runs less timing because he broke a piston around the summer time when he went to the 6.0 setup
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