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You are very right! (more) (archive)

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Posted by Bob ///M3 on September 18, 2000 at 20:37:35:

In Reply to: Re: Not sure what you mean! posted by Kit Wetzler on September 18, 2000 at 15:37:54:

This is one very important scenario that isn't discussed at length enough.

I would like to see data on the input signals from the knock sensors while doing a dyno run with stock software versus performance software. It might be very interesting! Of course, there are other factors but this one hasn't been discussed much.

Good suggestion about altering the knock sensors' signal to becoame slightly more aggressive. Too bad we don't have a signal light that indicates when the knock sensors are signaling that ignition retardation is taking place.

Bob ///M3

It is correct that the performance fuel maps are "at the ready" or as you say "ready for disposal" but unless conditions are perfect those maximum curve points on the map will not be used. However, this is also true of the stock fuel maps as well!

Just remember that the "fuel maps" are really not what is causing a power loss. The knock sensor is what is causing it. When the ECU hears knock, it pulls back timing which kills power very quickly, and it pulls it back to a stock level. What chip makers need to do is to tune the knock sensor thresholds to be a bit more aggressive and to allow a harmless level of knock...

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