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| Starting point tune http://www.supercarraces.com/phpBB3/viewtopic.php?f=24&t=1354 |
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| Author: | 1972LS5Chevelle [ Mon Mar 10, 2014 8:36 pm ] |
| Post subject: | Starting point tune |
My 72' is pretty close to being ready to run, and be roadworthy. I am going to start with somewhere around 14-18 degrees base timing. (Vacuum advance disabled) I have a Moroso spring and weight kit installed with the heavy springs. (around 36-38 degrees total advance) Plugs are indexed, stock heat range - 44 I think?, .035" gap IIRC. Petronix Ignitor III with matching coil. My SCR is 9.65:1 (measured) vs. the factory advertised 8.5:1. The DCR is 8.57:1 (For reference, I have a spare, untouched short block. I took some measurments and come up with 8.4:1 SCR and 7.365:1 DCR) I am guessing around 3900-4000 lbs with driver and fuel. 3.73 gears, M21 close ratio trans. Am I in the ball park with my timing and plug gap? |
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| Author: | Ted Daros [ Mon Mar 10, 2014 8:59 pm ] |
| Post subject: | Re: Starting point tune |
Seems in line, should start! Im curious what your cranking compression is? |
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| Author: | 1972LS5Chevelle [ Tue Mar 11, 2014 4:26 pm ] |
| Post subject: | Re: Starting point tune |
Ted Daros wrote: Im curious what your cranking compression is? I'll have to stick a guage on it and see. I generally like to check all 8 cylinders with zero miles, then again after 800-1000 miles. All the calculators I have checked online say around 188 psi +/- 1-2 psi. |
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