Bad idea for limiting boost?
Bad idea for limiting boost? So right now im strapped for cash. I dont want to run the risk of something going wrong and overboosting my engine. So can i add a bit more fuel to the fuel map above my boost region in case something goes wrong, itll fall on its face from being over rich.. Example: say the highest i want to go is 8lbs, i can fatten it up say around 11-12lbs. Should i leave the timing as is? is any of this safe to do? thx
yes. But I figured this thread was different. Like as in flooding it with fuel in case of an overboost condition. The other thread was asking what timing people are running. Iirc.
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So right now im strapped for cash. I dont want to run the risk of something going wrong and overboosting my engine. So can i add a bit more fuel to the fuel map above my boost region in case something goes wrong, itll fall on its face from being over rich.. Example: say the highest i want to go is 8lbs, i can fatten it up say around 11-12lbs. Should i leave the timing as is? is any of this safe to do? thx
Also, I've had cases where too much unburnt gas made the wideband report lean, so if you're running closed loop, that could be an issue.
Be careful, depending on how much fuel you already have, adding more fuel may actually give you more boost, especially with a small wastegate. An added safety measure is loosen the wastegate spring. If you're going to try it, maybe reduce the wastegate and try (fatten it) it at let say 4 PSI, then you have a buffer in case the extra fuel doesn't do what you expected. Then work your way up.
Also, I've had cases where too much unburnt gas made the wideband report lean, so if you're running closed loop, that could be an issue.
Also, I've had cases where too much unburnt gas made the wideband report lean, so if you're running closed loop, that could be an issue.
I did that for a little bit. Put a hobbs switch connected to ground out my IAT. and at that temp in the IAT table I'd pull a bunch of timing, similar to the sloppy anti lag thing.
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You should have your fuel tables and your timing tables properly scaled to be safe in case of overboost. Not necessarily just dump a bunch of fuel but to give enough it wouldn't be too lean. But mostly pull timing. Plenty of other ways to build safety into things like Doug said too.
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From: Norn Iron
You dont need to do anything daft, just have the load cells above target safe. That applies all the time anyway
But really, if all gate plumbing etc is good and quality parts are used, there should be no risk of overboost.
But really, if all gate plumbing etc is good and quality parts are used, there should be no risk of overboost.