Predator tuning....let's see if I am understanding this right...
06-27-2004, 04:52 PM
#1
Predator tuning....let's see if I am understanding this right... +% on PE richens fuel across the entire rpm range...
+% on Spark advances timing at WOT only...
I want my LTs to be slightly - when cruising, 0 at WOT...
Right now I have PE at +4.75%, Spark at +5%, and my LTs are -1 to 1, 0 at WOT. My O2 mV are 885 at WOT, no knock seen from 1st to the top of 3rd gear.
When I had PE at 0, my O2 mV was 905....
So, is any of this close to a decent tune? What looks good, what looks bad? Advice?
+% on Spark advances timing at WOT only...
I want my LTs to be slightly - when cruising, 0 at WOT...
Right now I have PE at +4.75%, Spark at +5%, and my LTs are -1 to 1, 0 at WOT. My O2 mV are 885 at WOT, no knock seen from 1st to the top of 3rd gear.
When I had PE at 0, my O2 mV was 905....
So, is any of this close to a decent tune? What looks good, what looks bad? Advice?
06-28-2004, 11:33 PM
#3
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No PE is only at WOT. The car will run "leanish" otherwise. Crusing around you want to be at 0 or low neg. numbers.
I do not remeber the spark. But I "thought" it was immediate and always unless you get KR. You want that in the 27 range at WOT
I do not remeber the spark. But I "thought" it was immediate and always unless you get KR. You want that in the 27 range at WOT
07-14-2004, 06:22 PM
#6
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tuning Ive also been messing around with the tuning for a while. Right now at WOT my 02's read 950-980. Does this mean rich or lean??? To fix this I would add PE or take it away? And also, would me having ported/polished heads with the stock cam affect anything? thanks!
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07-17-2004, 04:47 PM
#12
Launching!
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Hey 99SSleeper;
i got Jet Hot Lt's and ORY also, what % is you spark and A/F at?
at idle my spark is at 25-27%, i cant remeber off the top of my head what i have mine set at.
i got Jet Hot Lt's and ORY also, what % is you spark and A/F at?
at idle my spark is at 25-27%, i cant remeber off the top of my head what i have mine set at.
09-20-2004, 01:55 PM
#14
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950-980 is very rich. Most people shoot for .85 to .88 (850 to 880). I'm not familiar with tuning LS1's but I did do a bit with my 90 Talon Turbo, same concept. It's just 02 sensor voltage. The higher the number, the richer the AF ratio is. Anything below 800 is getting pretty lean. Like they say..... Your engine will never feel as good as it does the minute before it blows (lean condition).
09-20-2004, 04:31 PM
#15
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I have a snapshot of my old Predator tune as a
.bin file.
Spark push from the Predator tune is not WOT only,
it adds everywhere from the 0.32 g/cyl line on up.
By way of reference, this is about 20% throttle on
my car.
880mV on stock exhaust manifolds is right about
where you want to be. Get it there, jack the spark
forward until you see KR and then back off a percent
(or two). The Predator "%" scheme is kind of bogus,
don't believe it literally. Like, since when does -25%
on 0.300 sec shift adaptation time equal 0.000?
Must be the New Math.
.bin file.
Spark push from the Predator tune is not WOT only,
it adds everywhere from the 0.32 g/cyl line on up.
By way of reference, this is about 20% throttle on
my car.
880mV on stock exhaust manifolds is right about
where you want to be. Get it there, jack the spark
forward until you see KR and then back off a percent
(or two). The Predator "%" scheme is kind of bogus,
don't believe it literally. Like, since when does -25%
on 0.300 sec shift adaptation time equal 0.000?
Must be the New Math.
