Knock retard at part throttle
11-09-2005, 09:00 PM
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Knock retard at part throttle When I say am at 30mph and give some throttle I notice some knock retard. but from a stop and go wot there is no retard. How would I fix this i'm guessing it's because of the load when pushing throttle. Can I adjust pe table or what? Thanks guys.
11-09-2005, 09:26 PM
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You may want PE in sooner (enable MAP, TPS) or
you may just want to pull back part-throttle timing.
Then there is the tip-in aspect, rolling the throttle
puts you into speed density mode until MAP comes
back to stable and if you have airflow mods aft of
the intake manifold that aren't represented by a
shiny up-to-date VE table you're liable to be lean
on transient throttle. Heck, that can even happen
relatively stock. See this by hard O2 voltage dips
every time you roll on the throttle, if this precedes
the KR event by a frame or three then focus here.
you may just want to pull back part-throttle timing.
Then there is the tip-in aspect, rolling the throttle
puts you into speed density mode until MAP comes
back to stable and if you have airflow mods aft of
the intake manifold that aren't represented by a
shiny up-to-date VE table you're liable to be lean
on transient throttle. Heck, that can even happen
relatively stock. See this by hard O2 voltage dips
every time you roll on the throttle, if this precedes
the KR event by a frame or three then focus here.
11-09-2005, 10:21 PM
#3
some people like to do their spark timing on the main spark tables...
I prefer to use teh stock spark tabels and add to only PE by using the spark add vs AFR vs RPM table..
you can still remove knock down low if needed(usually not really needed on the stock table unless you add a different cam) and you can still add spark to WOT (you will be in PE at WOT) and you can do it by different AFR's and by RPM...
Why add 4*-6* over the entire table causing knock in a few areas that were already all good...when you can easily controll how much spark you add by another table
I prefer to use teh stock spark tabels and add to only PE by using the spark add vs AFR vs RPM table..
you can still remove knock down low if needed(usually not really needed on the stock table unless you add a different cam) and you can still add spark to WOT (you will be in PE at WOT) and you can do it by different AFR's and by RPM...
Why add 4*-6* over the entire table causing knock in a few areas that were already all good...when you can easily controll how much spark you add by another table
