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Flash vs Piggyback - Where we stand today.
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01-23-2011, 09:57 AM | #23 | |
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How about reading the actual knock sensors activity? |
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01-23-2011, 10:04 AM | #24 | |
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From my reading of the threads, Cobb did not state that there are multiple load based ignition maps, or any weather corrections. My understanding is one map based on load... if this is the case be prepared for some knock caos. |
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01-23-2011, 10:05 AM | #25 | |
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01-23-2011, 11:05 AM | #26 | ||
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And you are correct. If a flash tune is currently targeting ~4 deg in the midrange and ramping up to 11 deg by redline AND only running 13-11psi on 93oct in the winter, you aren't going to see knock. Not by a virtue of anything other than the fact that the tune is very conservative. You'd see the same thing if you run a Procede at 11psi with 100% ignition correction. Quote:
-You aren't concerned about making more power when conditions are good. -You aren't concerned that the DME is trying to target the same power output wen condition are bad. -Load requests are always within the reach of turbo system capacity (ie, the DME is NOT targeting 16psi at 7000rpm when it is only capable of supporting 13psi) -Load requests don't exceed what the engine can support given allowable knock threhsolds (ie, supporting reasonable boost pressures on pump gas). All these criteria of easily met on a bone stock car that runs 6-9psi depending on conditions. Double that boost pressure and all bets are off. shiv Last edited by OpenFlash; 01-23-2011 at 11:30 AM.. |
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01-23-2011, 11:18 AM | #27 | ||||
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Regards, Shiv |
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01-23-2011, 11:28 AM | #28 |
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This is one misinformation. The reaction to boost overshoot may or may not be able to be corrected, and it also affects driveability. It is not desired.
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01-23-2011, 11:31 AM | #29 |
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Actually, people who experience overshoots/throttle closure say that it does no affect driveability. Cobb already stated, they can remove the throttle closure issue if users request it. This will probably an option with ATR if I had to guess
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01-23-2011, 12:05 PM | #30 |
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Throttle closure is necessary to control overboost conditions in Cobb's flash so why would they allow something fundamentally required by their flash to work properly easily removed on their customer's request?
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01-23-2011, 12:06 PM | #31 |
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Because once ATR comes out, you are responsible for your car, not them. keep in mind, cobb is not out there to push anything with ots maps.
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01-23-2011, 12:47 PM | #32 |
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01-23-2011, 12:48 PM | #33 |
My X5d tows my spec miata to the track.
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01-23-2011, 12:49 PM | #34 | |
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I would say a good tune will NOT knock. |
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01-23-2011, 12:51 PM | #35 |
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Must be n54tech
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01-23-2011, 12:57 PM | #36 | |
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I mean this with all due respect. Guys can you please keep the fanboyism down in this thread. This thread so far is one of the best I've read this week. Everyone has their favorite tune, but start a different thread if you guys want to pump camps. |
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01-23-2011, 12:58 PM | #37 |
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Very much true, this is the main feature I'm waiting for because I have a cobb tuner in Chicago that I've used before that does great work in the subbie world. Plus they have an AWD dyno which helps.
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01-23-2011, 01:10 PM | #38 |
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I am not sure if there is much of an "issue." I know Alan had some throttle problems, but I believe four of us have posted AP logs and three show none or little throttle correction activity. As I look my logs over, timing and WGDC are locked step-for-step doing what they do best.
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01-23-2011, 01:10 PM | #39 |
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Fixed
and yes, that makes more sense that your post.
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01-23-2011, 01:35 PM | #40 |
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+1. No tune is superior to another. Each have positives and negatives. Stating that one tune is better than another is stupid and only results in the next tuner war thread. Seen it 79767987080764 times already.
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01-23-2011, 01:49 PM | #41 | |
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01-23-2011, 03:54 PM | #42 | |
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01-23-2011, 05:54 PM | #43 |
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Just curious, How would one go about detecting knock?
How does the DME detect it? Do all tunes rely on just the DME to predict knock? I know some tunes are retroactive and some proactive when it comes to timing adjustments, just curious how the system goes about detecting/prediction knock.
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01-23-2011, 05:59 PM | #44 | |
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