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B6304 engine, 181 HP vs 204 HP changes 900

uid 19's pic
posted by  jbowers on  Fri Feb 6 09:13 CST 2004
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last visit: Sun Jan 22 13:49 CST 2012
[RELATED]

Very nice analysis!

Here is my view. At steady speeds, the later engine theoretically has more torque in reserve. So if you achieve 99% of WOT and the transmission doesn't downshift, the newer cars will acc. faster than the older cars. But, if you mash the throttle and cause a downshift, the revs will typically go above 4000 and then my car now actually looses acceleration until the next upshift at 6200 RPM which which brings it back down in RPM. On a WOT acceleration run a large % of the time is spent above 4000 RPM where the breathing seems "asthmatic".

Im guessing that after, or when, I change my cams I will be pushing the accelerator further down to get the same intermediate level of acceleration around town and on the highway, but who cares if, when I'm trying for "all-out" by causing a downshift the result is a net increase in acceleration. (I often go down the entrance ramp at full throttle in order to be able to merge with the 80 MPH RT95 traffic in my neighborhood.)

What do you think?
--
'96 965 with 16' wheels at 112K. Had '85 745 Turbo Diesel for 200K.






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