Quote:
Originally Posted by slaughtr
One issue I have, particularly at the track, is that the second cam change-over can be very abrupt. Phil, you and I have talked about this and I will see how it does after the raised second cam switchover, but...
It also seems to me that, even above the cam switchover point, the engine management will revert to the lower cam if throttle input is low. For instance, going around a long sweeper, even if I'm at 6,000 RPM or so, if I'm only modulating the rear with the throttle with light throttle inputs, when I come out of the turn and put the hammer down, I feel an abrupt cam change. It's very disconcerting.
Is it possible to stop the ECU from reverting to the lower cam at light throttle inputs? Why would it be like that in the first place, fuel economy?
Anyone?
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Ronnie, what you are describing is the need for a lower TPS limit, not raised, for the "Exhaust Cam" TPS limit. The original base maps had values ranging from 40 to 45 deg. The idea was to gain fuel economy, as you mentioned, by only using the second cam when it is really needed. For track cars we find a lower values to be better overall. A car I set up recently had it set as low as 20 deg and it worked very well in the conditions that require careful modulation. Try the map I sent you recently and let us know if that is an improvement.
Kris