$88 Rpm derivative spark control. What it's it?

**f85gtron** · 10-15-2015

So, for 5th i have n/v of min/max 39/147. 4th is maxed (turned off because I have a four speed manual). 3rd is 60/158. I suppose the cutoff (maximum to allow rdsc) would then be 60?
I'm confused by what constitutes a "minimum" and a "maximum" value in this context.

**f85gtron** · 05-15-2017

update:
Ive got rdsc to work really well, with the exception of decel. it cuts so much timing that the motor pops. it keeps pulling down past idle rpm almost to stall. with rdsc turned off, everything is fine. what parameters in 88 effect rdsc decel behavoirs?
ron

**RobertISaar** · 05-15-2017

to change the amount of advance that is being added or pulled, you'll need to change the D-RPM multiplier for the gear you're in(effects both added and pulled spark), or change the maximum RDSC spark value for the gear you're in(D-RPM is Negative, to change only pulled spark).

**f85gtron** · 05-16-2017

thanks robert!
i had them set to 0*. i thought it would pull 0* timing out, not set to 0* on neg drpm! i found some 3.1 numbers from an auru bin and they work much better. ill play with it some more.
ron