0 Knock with a/f @ 10.7-9
Jul 12, 2006, 05:59 PM
#1
0 Knock with a/f @ 10.7-9
I did a little tuning on my car with the flash software and evoscan. I had it tuned to 11.2-11.5 a/f and hitting about 12 degrees of timing going up to 15 degrees around 7000rpms. 21Psi of Boost on a 35r,but my car was showing 6-9 points of knock from 6000-8000rpms so of course the car knocked my timing down.
Is it normal for the car to have 0 knock @ 10.7- 10.9 a/f? or should I be able to hit 11.5 af without knock? Is the knock count safe around 11.5 a/f or this turbo?
Oh BTW I have ISP Racing Gt35r kit, 780 injectors and 272 gsc cams on stock gears.
Is it normal for the car to have 0 knock @ 10.7- 10.9 a/f? or should I be able to hit 11.5 af without knock? Is the knock count safe around 11.5 a/f or this turbo?
Oh BTW I have ISP Racing Gt35r kit, 780 injectors and 272 gsc cams on stock gears.
Last edited by DCSilvrEvo; Jul 12, 2006 at 06:03 PM. Reason: Add More
Jul 12, 2006, 06:24 PM
#3
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For your reference:
On my previous tune that I paid for, I was hitting 8 degrees of timing at sub 11.0 afr with 2 counts of knock at torque peak.
After I adjusted it, I'm hitting 12.0 AFR throughout the range with 6 degrees of timing with zero knock.
On my previous tune that I paid for, I was hitting 8 degrees of timing at sub 11.0 afr with 2 counts of knock at torque peak.
After I adjusted it, I'm hitting 12.0 AFR throughout the range with 6 degrees of timing with zero knock.
Jul 12, 2006, 06:28 PM
#5
Originally Posted by JeffR116
For your reference:
On my previous tune that I paid for, I was hitting 8 degrees of timing at sub 11.0 afr with 2 counts of knock at torque peak.
After I adjusted it, I'm hitting 12.0 AFR throughout the range with 6 degrees of timing with zero knock.
On my previous tune that I paid for, I was hitting 8 degrees of timing at sub 11.0 afr with 2 counts of knock at torque peak.
After I adjusted it, I'm hitting 12.0 AFR throughout the range with 6 degrees of timing with zero knock.
Jul 12, 2006, 06:55 PM
#6
Originally Posted by DCSilvrEvo
I had it tuned to 11.2-11.5 a/f and hitting about 12 degrees of timing going up to 15 degrees around 7000rpms. 21Psi of Boost on a 35r,but my car was showing 6-9 points of knock from 6000-8000rpms so of course the car knocked my timing down.
Is it normal for the car to have 0 knock @ 10.7- 10.9 a/f? or should I be able to hit 11.5 af without knock? Is the knock count safe around 11.5 a/f or this turbo?
Oh BTW I have ISP Racing Gt35r kit, 780 injectors and 272 gsc cams on stock gears.
Is it normal for the car to have 0 knock @ 10.7- 10.9 a/f? or should I be able to hit 11.5 af without knock? Is the knock count safe around 11.5 a/f or this turbo?
Oh BTW I have ISP Racing Gt35r kit, 780 injectors and 272 gsc cams on stock gears.
Would easing up on the timing first, pulling the fuel to low 11's, and then readjust the timing accordingly be an option? Guru's, what do you think?
Jul 12, 2006, 07:02 PM
#7
Originally Posted by C6C6CH3vo
Is this on 93 octane?
Would easing up on the timing first, pulling the fuel to low 11's, and then readjust the timing accordingly be an option? Guru's, what do you think?
Would easing up on the timing first, pulling the fuel to low 11's, and then readjust the timing accordingly be an option? Guru's, what do you think?
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Jul 13, 2006, 10:29 PM
#10
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I would suggest the following approach.
Keep your AFR at about 10.9 for now.
Keep your boost at 21 psi.
Consider using a map similar to this as a starting point (maybe even go a degree lower).
I assume that the 35r can hold its boost to redline, which is why the snippet I posted follows a more linear timing curve than the stock map. This should hopefully work without knock counts. If it does, up it by one degree. If you still get knock counts, go down by two.
l8r)
Keep your AFR at about 10.9 for now.
Keep your boost at 21 psi.
Consider using a map similar to this as a starting point (maybe even go a degree lower).
I assume that the 35r can hold its boost to redline, which is why the snippet I posted follows a more linear timing curve than the stock map. This should hopefully work without knock counts. If it does, up it by one degree. If you still get knock counts, go down by two.
l8r)
Jul 14, 2006, 08:03 AM
#11
I brought the timing down about 2 degrees in the upper register and Now i just have to find a good strip to do fuel and get it back to 10-9 11.0 I also modified the knock filter to the 05 so it wont pull timing as quick. I have 0 knock now from 5000-8000.
