Quote:
Originally Posted by jeremyc74
They do see timing changes. The changes resemble what's being seen with other tunes. The timing has to change to make this much more power.
I don't know how it's doing it, and I don't care. It works well, and is very cost effective.
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Quote:
Originally Posted by dadasracecar
THAT would be scary as you make power by advancing timing. Retarding is a safety measure when increasing boost.
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Quote:
Originally Posted by jeremyc74
What are you talking about? Where did I say anything about retarding timing? I said it has to CHANGE. I would consider advancment a change.
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Quote:
Originally Posted by dadasracecar
There is no way the JB3 (or any other piggyback for that matter) is advancing timing over stock while raising the boost to almost double the stock pressure. That would be suicide unless you were running some sort of methanol system.
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Quote:
Originally Posted by jeremyc74
Your posts don't even make sense any more.
I said the timing HAS TO CHANGE in order to make as much power as people are seeing with the JB3. Are you saying that the timing ISN'T changing? So the JB3 is able to increase the boost and power levels and the stock timing is still working? :iono:
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My posts don't make sense? You're delusional. What the hell does CHANGE mean to you? It's either retarded or advanced from the stock position. Read the quoted posts that you made.
I'm saying the JB3 increases boost and fueling but, until shown otherwise, it does not change timing. The speculation is that it relies on the car's knock sensor to pull timing when the car knocks at high boost on the stock timing map. That's why it may be dangerous. It would be if that speculation is true.
The general rule of thumb is that you pull timing when significantly increasing boost to mitigate knock. If you're just raising (doubling) boost and adding fuel any car will knock. Relying on the knock sensor to pull timing after the fact is reactive and bad because your engine will suffer that knock event - possibly every time you go into that max boost situation. If a piggyback pulls timing when raising boost the car (hopefully) won't knock under high boost and the ecu controls the timing as normal. It may advance or retard the timing but it will do so using it's full range rather than immediately pulling a bunch from a big knock event caused by doubling the boost and leaving timing as it were.