Hi All,

I put AFR Eliminator 180 heads on my Son's 1988 L98 IROC-Z.

Presently running the stock Advance vs. RPM vs. Load table.

Does anyone have a recommended Advance table?

I heard (rumor mil) that these heads do not require very much advance. At least for carb applications.

Best Regards,

Bruce

 

They typically seem to like 30-34 deg at wot depending on compression and gas. Most cruise areas at lower loads seem to tolerate 34-36 deg or so for me. More would be nice if it takes it but my last motor didnt seem to want more than 35-36 at cruise

 

34 seemed to be my sweet spot on my 195's.

 

Thanks Guys.

I looked at the stock L98 table in the bin.

17.93 17.93 17.93 17.93 17.93 18.98 20.39 21.80 20.74 20.04 20.04 20.04
16.17 16.17 16.17 16.17 16.88 18.28 20.04 20.74 20.74 20.04 20.04 20.04
15.47 15.47 15.47 15.47 15.47 17.93 20.04 21.09 22.15 20.74 20.74 20.74
17.93 21.09 24.61 24.61 26.02 25.66 22.85 22.85 22.85 18.98 18.98 18.98
18.98 23.91 28.13 27.77 27.07 22.15 18.98 17.93 17.93 16.17 16.17 16.17
19.69 26.02 30.94 30.94 30.94 28.48 23.91 22.15 22.15 18.98 18.98 18.98
21.09 35.86 35.51 34.45 33.75 33.05 29.88 26.02 23.20 22.15 22.15 22.15
22.50 33.40 35.86 35.86 35.16 34.45 32.70 26.02 23.20 22.15 22.15 22.15
22.50 33.40 35.86 35.86 35.86 34.81 33.40 29.88 26.02 24.26 22.15 22.15
22.50 33.40 35.86 35.86 35.86 35.86 34.45 32.70 28.83 24.26 22.15 22.15
22.50 33.40 35.86 35.86 35.86 35.86 35.16 28.83 26.02 24.26 22.15 22.15
22.50 33.40 35.86 35.86 35.86 35.86 35.16 27.77 24.26 20.04 20.04 20.04
22.50 33.40 35.86 35.86 35.86 35.86 33.05 27.77 23.20 21.09 20.39 20.39
25.31 33.75 37.97 37.97 37.97 35.86 31.99 26.72 24.26 21.80 20.04 20.04
25.31 26.72 29.88 33.75 33.75 35.86 32.70 27.77 25.31 21.80 20.39 20.39
25.31 33.75 37.97 37.97 37.97 35.86 31.99 27.77 24.26 23.91 22.50 22.50
33.75 40.08 40.08 40.08 40.08 37.97 35.16 31.99 28.83 24.96 23.20 23.20

Sorry about the poor looking map.

I have not run the engine very hard. Looks like I should limit the values about ~36 degrees?

Best Regards,

Bruce

 

If you are starting a fresh tune keep it low for now and then as you get air fuel ratios in line, add more timing and see what it does