Can 1.0 knock cause -4 degrees of timing retard?
#1
Can 1.0 knock cause -4 degrees of timing retard?
That`s what I autotapped this weekend at 37MPH. Then the timming jumps right back up again. How much can that hurt my times?
I ran 12.7@105 with just a converter & lid .. then put on skinnies, maf ends, and ASP pulley and couldn`t break into the 12`s and my MPH dropped to 103. <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
It was about 20 degrees hotter but only about 75*
I ran 12.7@105 with just a converter & lid .. then put on skinnies, maf ends, and ASP pulley and couldn`t break into the 12`s and my MPH dropped to 103. <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
It was about 20 degrees hotter but only about 75*
#2
Re: Can 1.0 knock cause -4 degrees of timing retard?
Was the timing drop at shifts? If so, Torque Management is a play and be glad it's only 5!!
In my personal exp, I've never seen I 5deg (with 1deg of KR) drop at the point of the KR occurance.
Your run data sounds strange. If the MAF ends were making you run too lean or the ASP pully was generating false KR then you should have seen the KR higher?? Don't know. What did your O2's look like?
Mark
In my personal exp, I've never seen I 5deg (with 1deg of KR) drop at the point of the KR occurance.
Your run data sounds strange. If the MAF ends were making you run too lean or the ASP pully was generating false KR then you should have seen the KR higher?? Don't know. What did your O2's look like?
Mark
#3
Re: Can 1.0 knock cause -4 degrees of timing retard?
I think 37 MPH is the shift point.. o2`s were between 800-920. One bank seemed to be running leaner than the other.
kinda strange.... I was hoping for mid 12`s for sure <img border="0" title="" alt="[Sad]" src="gr_sad.gif" />
kinda strange.... I was hoping for mid 12`s for sure <img border="0" title="" alt="[Sad]" src="gr_sad.gif" />
#6
Re: Can 1.0 knock cause -4 degrees of timing retard?
Dan, The negative timing you are seeing at 37 MPH is timing being pulled during the shift. You should also see it at your 2-3 shift. I've been tuning with Edit to get rid of this problem for a few weeks now to no avail. One fix for it though is to bump up your Spark Retard Limit to a positive value. This will prevent a dip into the negative. I set mine at +10 and noticed a marked improvement at the track, you can actually feel a difference. The car no longer noses over on the shifts - its very nice. The current debate on this subject though is whether or not the Spark Retard Limit table is solely for timing during shifts. I'm still looking for that answer.
#7
Re: Can 1.0 knock cause -4 degrees of timing retard?
are you running an A4? if so, in addition to timing retard you also may be experiencing fuel cutoff during upshift. this is done for smoother shifts in daily driving, but may not be in your best interest at the track. unfortunately, I don't have a solution to this. anyone?
<img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
<img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />