msd btm
#12
Re:msd btm
Originally Posted by TurboEF9
Originally Posted by Whitey
With the BTM you should be advancing your timing to get a faster spool than using the BTM to take the timing out
Think about this. Say your spark is set to pop at 2.3 degrees at 9psi (based on your ECU's ignition map), and 7400 rpms. Add this to your static timing (assuming stock), you'll spark at 18.3 degrees BTDC.
We use your "Advance BTM", which would advance per psi of manifold pressure, set to say, .5 (one half of a degree per psi). (.5 advance * 9 psi) + 16 static = 22.8 degrees, BTDC, rather than the 11.5 degrees it would be when retarding (as BTM is meant to do)... ..got ring lands?
Re-reading what I wrote I can now see where you got that idea. I'll try to be clearer in my responses next time.
#14
Re:msd btm
Originally Posted by Whitey
Originally Posted by TurboEF9
Originally Posted by Whitey
With the BTM you should be advancing your timing to get a faster spool than using the BTM to take the timing out
Think about this. Say your spark is set to pop at 2.3 degrees at 9psi (based on your ECU's ignition map), and 7400 rpms. Add this to your static timing (assuming stock), you'll spark at 18.3 degrees BTDC.
We use your "Advance BTM", which would advance per psi of manifold pressure, set to say, .5 (one half of a degree per psi). (.5 advance * 9 psi) + 16 static = 22.8 degrees, BTDC, rather than the 11.5 degrees it would be when retarding (as BTM is meant to do)... ..got ring lands?
Re-reading what I wrote I can now see where you got that idea. I'll try to be clearer in my responses next time.
thats what the msd btm do. pn6762. you set your timing at stock timing, then the btm has two *****, one on the box to set the psi amount that you want timing to start retarding, and the other **** is dash mounted, to set the amount of timing to retard, I have mine set to run at 1.5 deg, for every 2 pounds of boost.
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