For those interested in the MPI intake manifold but have some concerns
about losing low end torque, my first test at the track indicates
that low end torque loss is neglible at best under real world variables.
The average 60' times for my 14.9s towards the end of the '99 season
with the stock intake manifold was 2.118 sec. (low of 2.077 and
high of 2.161 . Yesterday's runs into a blustery 30-35 mph headwind with
the MPI installed gave an average of 2.144 sec. (low of 2.117 and
high of 2.164). This is an average of less than 3/100s sec. slower
with the MPI.
The average 330' times without the MPI in last year's 14.9s runs
was 6.173 sec. (low of 6.095 and high of 6.236). Yesterday's
330' average with the MPI was 6.300 sec. (low of 2.117 and
high of 2.164). This is an average of about 13/100s sec. slower.
Dyno runs under 'ideal conditions' with and without the MPI will come
shortly.
Again, I want to thank Jon Steiger for doing the enormous R&D grunt
work and putting out a kit which makes adapting this performance mod
for our magnum 8s as painless as possible.
Bob. Southern Ontario, Canada.
'97 Dakota CC Sport, FR, 5.2L, 3.55 SG, auto.
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