Spark Knocking?

FoxRod87

Active Member

Feb 1, 2006

243

1

27

Carolina

Sep 6, 2008

#1

• Sep 6, 2008

• #1

My car spark knocks really bad in 3rd gear running at the dragstrip. What should I do? I have a SCT Xcal 2. Do I tune the spark advance down or Global spark down or try to richen the fuel mixture? Thanks.

 

Superhereaux

chicks make me feel inadequate

Founding Member

Jul 30, 2002

538

3

59

South Texas

Sep 6, 2008

#2

• Sep 6, 2008

• #2

Switch to a higher octane or retard the timing a bit

 

J

Jbauer

New Member

Jan 20, 2008

506

0

0

Sep 6, 2008

#3

• Sep 6, 2008

• #3

Switch down the spark advance.

 

oxfordgt

Member

Apr 30, 2006

288

2

18

Clarksville, TN

Sep 6, 2008

#4

• Sep 6, 2008

• #4

If you are already running the highest octane available then back off the WOT spark.

 

FoxRod87

Active Member

Feb 1, 2006

243

1

27

Carolina

Sep 7, 2008

#5

• Sep 7, 2008

• #5

oxfordgt said:

If you are already running the highest octane available then back off the WOT spark.

Click to expand...

Is that the Global Spark or the Spark advance. And yes this is on 93 octane. And it only spark knocks at WOT.

 

oxfordgt

Member

Apr 30, 2006

288

2

18

Clarksville, TN

Sep 7, 2008

#6

• Sep 7, 2008

• #6

Do not touch the global spark. That will change spark at idle and cruise. Only back off the WOT.

 

FoxRod87

Active Member

Feb 1, 2006

243

1

27

Carolina

Sep 7, 2008

#7

• Sep 7, 2008

• #7

So I need to retard the timing from 4000-8000? Or all of them?

 

oxfordgt

Member

Apr 30, 2006

288

2

18

Clarksville, TN

Sep 7, 2008

#8

• Sep 7, 2008

• #8

I don't deal with sct I use Sniper. But it should have 3 different WOT sections 2000-4000,4000-6000, 6000-8000 or something like that. Find out at what rpm you are pinging and pull timing out of that area.

 

FoxRod87

Active Member

Feb 1, 2006

243

1

27

Carolina

Sep 8, 2008

#9

• Sep 8, 2008

• #9

Yes it does. Thanks alot.