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psalt psalt is offline
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Join Date: Mar 2006
Posts: 1,107
The real interesting area is that big hump you see in the graph above 2500RPMs, I have played in this area a lot and will tell you it completely changes the car. The throttle response goes flat if you lower that hump and it really comes alive if you make it steeper.

Sal,

OK, you are interested in the "big hump" (like everyone else). The way I read this map is the steepness of the "big hump" is the rate at which you pull out timing when the throttle opens. I know you said the 8%-58% is not correct, but if it relates to manifold pressure (load) or throttle angle, the timing increase only occurs under 21%, which is light load. I doubt you ever get to 5000 rpm under 20% throttle, unless you are coasting, certainly not under acceleration or top speed. What kind of % are you seeing at 65 mph cruise ? I am used to seeing a 15-20% throttle angle at part throttle cruise, where timing needs to be advanced above the WOT curve. As soon as you step on the pedal (throttle response) the extra timing goes away. Most systems use a 30% throttle position to go open loop, when does the Carrera TPS go open loop ?
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Paul
Old 01-24-2009, 01:45 PM
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