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----- Original Message ----- From: "Jim Adney" <jadney@vwtype3.org> > fuel. At some point the PS will max out, however, and then there will be no > additional fuel as the airflow continues to increase. So you are lean. > > If you try to cure this by just increasing the fuel pressure you can make > things work right at some point, but the mixture at 36psi will be 20% rich and > the PS will still be maxed out. A "ramping" regulator has been suggested to take this into account. That is,using a microswitch,(or something similar),a higher pressure could be "activated" at some pre-set throttle position.I think I've heard of such a thing being used in turbo application. > > > >In my opinion, It MIGHT be possible to upgrade our FI to that of a > > >different car IF we also upgraded the throttle body either by machining out > > the > > >throat diameter to that of the other car, or by using the throttle body > > from that car. > > > > Is the porsche d-jet THAT dissimiliar?The internal volume doesn't appear to > > be that different. (The porsche bieng slightly larger) > > Internal volume has nothing to do with it. It's simply the throat diameter and > possibly a small effect from the air cleaner flow properties. I don't know what > the relative throat diameters are, or what effects that might have. I am assuming that you're referring to air velocity past the port for the MPC. Hmmmmm.If the relative diameters of the throat are close then perhaps it's only a matter of placeing the sensing port of the MPC at a distance that approximates the distance inside a T3. > > -- > ******************************* > Jim Adney, jadney@vwtype3.org > Madison, Wisconsin, USA > ******************************* > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org > >