Playing with my cobb AP and I switched one of my views to knock sensor 1. My value is around 86-88 and low of 81 and high of 90. I have no idea what a good range is? My friends sti has a knock sensor and supposedly if it goes over 3 it's bad. I'm utterly confused here and I can't find any helpful sample data in google for our cars.
His "knock sensor" is a knock ratio. If you see a kr of more than 3 hes right, its bad. The AP on this car doesnt have a KR pid to watch as far as I know.
Ian at COBB told me to monitor cylinder 1 timing correction. If it stays at 0 or goes +, then your good.
KOEO(key on engine off) 167, hot idle 85(on knock 1), 30mph 104(knock 1), 55mph 137(knock 1). there are 2 knock sensors according to the reference chart.{ edit: pid reference is not in ratio(for this car), just a number (in the units mesured category it reads N/A.}
The dealer I took my car to on Monday told me the FiST does not have knock sensors. I figured he was mis-informed, but had no proof. Has anyone gotten a warning light or a trouble code?
Topped off the tank on 93 oct 3 hours of mixed casual/spirited driving and my correction cyl1 never went neg but did go pos to 4. But I have no clue what that means.
Depends on the area. California only has 91, yet I have found a couple places out there with 100 on tap. Also, E85 is becoming more popular, pop some of that in with a tune and your good to go haha
We have lots of fuels to play with in the U.S. That's part of the problem! Here, our posted pump octane rating is the average of ROM & MON. For the same fuel, the U.S. octane rating is 4-5 less than it is in countries that use AKI (Very similar to RON). Additionally, in most areas our fuel is 10% ethanol. Of note, some of our refiners make specialized high octane gasoline both for off-road/racing and some legal for street use (Sunoco offers over 20 specialized fuels). This is rarely available at the pump but can be legally obtained at prices about double our usual $4.00 a gallon.
We are possibly within a couple of years of having leadless aviation gasoline available from Swift Fuels and possibly Shell. Then this entire question will become mute.
So just a question. I played with my ign corr cyl 1 and at wide open throttle to about 4500 it goes 1.75 then after that's drops to negatives. Know why?
What octane map are you using? What gear is that in? Is it possible to take a log?
This car likes to add in timing when it is "happy". You can monitor timing corrections in all 4 cylinders individually, but I use #1 as a general reference. Typically, consistent negative timing corrections means that the mapping is too aggressive for the fuel being used or mechanical condition of the car. A negative correction here or there would be normal. But if you have consistent negative corrections, use a lower octane map until you can get higher quality fuel.
Any negative values means motor is sensing knock and is pulling timing to keep the motor safe (from detonating).
Why don't some of you do some datalogs, drive in 3rd or 4th gear and do some WOT pulls? I will be logging some more later today and posting results - but I am in cali so only 91 map till I get to a 100oct station later next week.
Just did some data logging on a cool rainy day, on stage 1 93 V102
Ign Corr. Cyl1 (°)
+.75
3800-4400
+1.5
4471-4947
+2.25
5032-5483
+3
5553-5973
+3.75
6035 then no longer full throttle
All is happy on my car, thanks Cobb
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