Quote:
Originally Posted by Anthony1s
So, if I'm understanding your question correctly... you are asking if an upgraded fuel pump will alleviate any knock issues you might run into due to low octane fuel? And that this is on a M2 without a turbo upgrade. It's a good question.
My armchair scientist knowledge is telling me that it won't be a great solution. Pulling timing is an octane issue, not an issue with fuel starvation. Although, you can retune to dump more fuel into the cylinders... decrease the air:fuel ratio. Then the unburnt fuel will have a slight cooling effect. So in that sense, I think it may work, but it would require a custom tune to add more fuel. It may also come with the negative side effects of running too rich though. Like fouling your spark plugs.
Upgrading the fuel pump is really done to prevent fuel starvation and provide more fuel so a upgraded turbo can run in it's efficiency range.
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I think you've got it, though - due to my limited understanding of all the issues - I guess my question is really more general: I'd like to run the BM3 Stage 2 93 map, on an M2 with a stock turbo. From the discussions here, it seems people have issues with the engine's timing being pulled and will fall back on the 91 octane map. Are all timing issues related to knock? Is lack of fueling an issue in such circumstances?
My goal is just to be able to make consistent power. I also do not want to deal with the headache of WMI and the added complexity in order to achieve that.
Thanks again, I really appreciate the thoughtful replies.