what's a CFOL?
what's a CFOL?
Yes, it can be enabled for any TPS %.
The table you need to look at is B3616.
For instance I have mine set to enable from 15-20% 1600 rpm's up. In my case it has really helped push in a little more fuel when under load.
I am running closed-loop with MAF. Ran flawlessly this week on a run at elevations near 12,000 feet. For me I am essentially using the PE function as a 'semi-open loop', and after 2-3 months of learning and effort I am very pleased with my tune.
Hope it works out well for you.
..WeathermanShawn..
Shawn, if you're running that high up, your airmass is a lot smaller than in normal conditions. Your effective compression is much smaller than it would be at sea level, so you could probably get away with a much more aggressive settings for PE activation, as it takes a lot more effort for your car to hit the compressions where you'd need the enriched mixture. same goes for timing, but that's automatically covered since the timing table is on a airmass axis.
Marcin, thanks for the tip.
I will definitely do some testing at various loads and elevations over the next few months.
Scientifically I understand what you are saying about altitude and compression. My sea-level CR is ~11.0:1, but even at this higher elevation I have had to constantly fight that inevitable pinging and occasional knock.
This was the first tune I put over 300 miles on and beat the ping!
Again thanks for the tip.
..WeathermanShawn..
hm, you might be confusing a ping coming from too much timing per compression, with a ping that happens from high load as a result of going up hills, which happens a lot at altitude, unless you're at some huge plateau.
i spent few weeks trying to pinpoint a cause of ping in this supercharged cts-v once, and it turned out that the owner was just lazy and thought driving up a hill in 5th gear with a 4000+lb car is OK. hills don't show up in logs, to me it just pinged at random. this is why dynos and steady flow conditions are golden.
Agree.
Down shifting cures many a problem. It is easy to 'lug' up hills if you don't figure out it is time to down shift.
Fixed it though.
Yes, the dyno is a good controlled way to figure out many a problem. Terrain and elevation has its own unique challenges.
Talk to you later.
..WeathermanShawn..
Yes, one is pre-ignition, the other detonation, they work differently but have similar results.
Marcin, CFOL == OLFA (the table).
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