KR at WOT
04-16-2007, 10:38 PM
#1
On The Tree
Thread Starter
iTrader: (20)
Join Date: Jun 2005
Location: Florida
Posts: 108
Likes: 0
Received 0 Likes
on
0 Posts
KR at WOT
I have a Nelson Tune for my mods below, mainly the cam/headers. How much performance could I be losing if im seeing KR as high as 8.0 at WOT. I know KR is certainly not a good thing to see at any time. I like my Nelson Tune and this is my second cam Ive tuned for from Allen, the last one was the MS4 and I never saw any KR anywhere in the RPMs.
04-16-2007, 10:44 PM
#2
8 is pretty high. I can't really say how much power you're losing but that is definantly a pretty good spike.
You do have a 01-02 pcm right? Also you did do a crank relearn correct?
I was seeing tons of KR before I did a crank relearn and then it all went away.
You do have a 01-02 pcm right? Also you did do a crank relearn correct?
I was seeing tons of KR before I did a crank relearn and then it all went away.
04-16-2007, 10:48 PM
#3
On The Tree
Thread Starter
iTrader: (20)
Join Date: Jun 2005
Location: Florida
Posts: 108
Likes: 0
Received 0 Likes
on
0 Posts
I do have an 01-02 pcm. Interesting, I never even did a crank relearn after the recent cam swap, because it didnt appear i needed one after the MS4 cam...just plugged in the pcm and cranked over.. so a crank relearn could clear up all that KR?
04-16-2007, 10:51 PM
#4
Originally Posted by anarchyracing101
I do have an 01-02 pcm. Interesting, I never even did a crank relearn after the recent cam swap, because it didnt appear i needed one after the MS4 cam...just plugged in the pcm and cranked over.. so a crank relearn could clear up all that KR?
04-17-2007, 10:19 AM
#7
Originally Posted by Rhino79
Yeah, 4* is like the factory max for knock retard, so he probably changed that to 8* max. Your losing a lot of power with that much timing being pulled.
I want to say that all of the gas tunes I've seen have KR max set to 8* in PE mode, so at WOT, that's pretty much normal.
As to whether or not you're losing power from the timing being pulled... Maybe, maybe not. If the timing is excessively advanced, then pulling 8* may still leave you at a point where peak cylinder pressure is occuring. It's certainly not the most efficient before the spike picks up, but it may or may not be after the KR spike occurs.
Trending Topics
04-17-2007, 03:05 PM
#8
On The Tree
Thread Starter
iTrader: (20)
Join Date: Jun 2005
Location: Florida
Posts: 108
Likes: 0
Received 0 Likes
on
0 Posts
I couldnt get a hold of the buddy of mine with the obd2. What kinda obd2 or tec2 can i get inexpensively to do the crank relearn? Im sure ill need it in the future.
04-17-2007, 05:41 PM
#10
Senior Member
iTrader: (24)
Join Date: Nov 2001
Location: Tampa, FL
Posts: 6,044
Likes: 0
Received 0 Likes
on
0 Posts
Ive built 3 motors and swapped 4 cams and have never done a crank relearn. Never a problem yet.
8*s is a lot of timing but like dc said, it wont matter if the timing is advanced too much anyways. I would say that you are losing power though.
8*s is a lot of timing but like dc said, it wont matter if the timing is advanced too much anyways. I would say that you are losing power though.