02-18-2017, 02:33 PM | #155 |
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02-19-2017, 12:10 AM | #156 | ||
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That being said, it's still very wrong to set +4 additive target at higher RPM whatever bolt-ons you have, unless a bigger turbo is put in place. Stock turbo runs +4psi up top inefficiently. Bigger IC, richer mixture and retarded timing are working together to clean up the mess it makes, while a better idea is to avoid having the mess in the first place and instead find a boost target that balances well with stock turbo & cooling system to make efficient power, which seems not necessarily less (I thought it was, but it turned out not). Whatever that optimal target is, one thing for sure sport tuner or jb+ with +4 up top isn't it.
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02-19-2017, 08:22 AM | #157 | |
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02-19-2017, 11:05 AM | #158 | |
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1) In this case, IAT alone disqualify them. 2) Assuming IAT problem is solved with IC/Meth, you'll be then looking at a leaner AFR because there is no adjusting fueling to the increased boost. Pre cat o2 sensor will be constantly reporting lean and DME will be busy reacting by adjusting to STFT (short term fuel trim). Though I doubt a couple hard pulls is beyond DME's adjusting capability, a constantly adapting DME will make a less smooth power delivery. More importantly, DME is actually adjusting to a less optimal target (because it sees less boost than real), a richer mixture should've applied under higher boost to ensure less chance of detonation and lower EGT (Exhaust gas temperature). 3) Put leaner AFR aside for a while, you get to the messed up timing table, the very final stage where power output is dictated. With increased boost and leaner AFR, ignition timing should be retarded accordingly. That's a difficult mission for even a more sophisticated piggyback like jb4 and Dinantronics, let alone TMAP based ones which is incapable of touching it up at all. Granted, factory tune always leaves something on the table (which is why so many people get away with it with low factory boost N20/N55 application) and N55B30T0's factory tune has a richer AFR already thanks to higher boost target, you still are left with much less on the table with N55B30T0, something proven to be sensitive to or desperate for octane as a clear indication that ignition is close to its edge and engine is very much prone to detonation. Higher IAT and leaner fuel mixture just add to it. I believe that's what sometimes happen in mid-to-high rpm range and DME is reacting to it by pulling timing. Ask any seasoned JB4 N55 guys who plays with TMAP based piggyback at 17psi or above. I bet he'd be laughing his ass off. I've attach a data log with my friend's stock m2 running on jb4 map1 (sport tuner equivalence), who barely know what he is doing. It happened just today on highway where intercooler has plenty of flow at its disposal. Only it turns out, from a single run, IAT is rocketing and timing is falling to ground. You can't even tell if it's because of the IAT or detonation. And that's when most of time it doesn't even hit boost target, which is 19psi or so.
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02-21-2017, 10:33 PM | #159 |
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Has anyone considered the fact that the winter blend gasoline with butane mixed in could also be causing the timing to be pulled? We are in the middle of winter, although it doesn't feel like it and the owner lives in Philly, so the car is probably running on winter blend. Butane has been known to cause issue and pull timing and I am wondering if the dynos showing high stock power were done during the summer or in a warmer climate area where they don't use winter blend. Just some food for thought.
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02-22-2017, 07:35 AM | #160 |
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For the sake of completeness-
Since you are going stage 4 Dinan, if you install the piggyback nwhile waiting for the turbo to arrive and set it to stage 1 setting. A Dyno run at fab speed would tell whether the stage 1 actually makes more power than the sport tuner,
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02-22-2017, 08:07 AM | #161 | |
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02-22-2017, 09:13 AM | #162 | |
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02-22-2017, 11:27 PM | #163 | |
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02-23-2017, 06:49 AM | #164 |
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Everything works the same from comfort to sport +. Each mode in the tuner changes how high your targeted boost gets on full throttle.
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02-23-2017, 06:37 PM | #165 | |
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From Dinan website: Unlike most of Dinan’s product offerings the DINANTRONICS Sport does not offer a factory matching warranty and instead possesses a limited 1 year product only warranty that protects the user against defects and workmanship. This is the case in order to retain a very attractive price point. Even though it may not hold the warranty Dinan is known for, the device has still been rigorously tested and has met all of Dinan’s lofty standards in safety. For example, since the DINANTRONICS Sport module installs on the boost sensor and not the manifold pressure sensor, ignition timing and air-fuel mixtures remain safe for worry free driving. |
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02-24-2017, 04:21 PM | #166 | |
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02-24-2017, 04:25 PM | #167 |
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Fabspeed Motorsport Curious to know what your objective thoughts are here on the safety of the Sport tuner since you guys ran the dyno
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02-24-2017, 04:39 PM | #168 |
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Dinan makes a great product. It has been tested and proven to work for years and time after time again. They have a ton of extensive research done with these cars to ensure safety and reliability. That being said, I will not argue that there are alternative products out there that are of high quality as well as competitively priced.
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