Hi all.
Finally found a chasis dyno in the Toronto, Ontario area.
Hope you find something helpful and interesting.
Truck: '97 CC 5.2L, auto., 3:55 SG, 4,350 lb (truck/driver/0.5 tank full),
28" street tires
Mods as dynoed: MP Magnum R/T cam, lifters, retainers, valve springs,
pushrods, 1.6 al. roller rockers
F&B Stage 1 tb
14 x 2.25 open K&N
Leach ceramic-coated headers
Gibson dual rear exit cat-back
MP 7.5mm plug wires, 3923 Autolite plugs
160F tstat, Reline Water Wetter, Synth. engine oil
Custom programmed computer
Last year's best ET/mph: 14.917 sec., 90.78 mph
above mods but with 180 tstat, '96 MP PCM, short belt,
26" drag radials
Dyno results:
Baseline = 194.4 hp @ 3200 276.9 lb-ft torque @ 4600 (SAE correction
factor = 1)
Fluid Loss = 36.6 hp DriveLine Loss = 93 hp
1/4-mile = 14.72 @ 95.6 mph (under perfect conditions & auto. shifts @
5600 rpm)
Interesting Observations:
Surprised at the baseline figures considering I'm running 14.9s and
seeing dyno
figures from other 318s and a similar modded Dak in Mopar Muscle
(225hp, 297 torque).
Runs determining losses consisted on taking the truck to 5600 rpm at
WOT, lifting
gas pedal and letting rear wheels come to a stop and not having the
dyno rollers
stop the rear wheels ... believed that he called it "negative
baselining".
Can recover about 5-10 hp if I had synth. in tranny and differential.
Peak hp and torque rpms were near my own estimated 3300 - 4800 rpms.
There were two runs for the 1/4 mile baselines. One was letting the
tranny shift
by itself (5600 rpm in the custom programming); the second, using my
last year's
manual 1-2 shift @ 4800 and 2-3 shift @ 5200 with the '96 MP PCM and
26" drag radials.
Got to see these two runs with two graphic cars moving along a marked
1/4-mi.
line on the PC screen. The manual shift got the jump but, just after
the 2-3
shift, the auto. shifted car caught and pulled ahead before the end by
a fair
bit. What a hoot to see and surprising!!!
Got to see on the PC screen as he took the truck up to 5600 rpm and
registering
130 mph (no drag on the truck naturally).
Good fun and valuable info. for me at $99 CDN. Any subsequent dynos will
be $75 CDN.
Real world conditions come next Saturday (weather permitting).
Bob. Southern Ontario, Canada.
'97 Dakota CC Sport, FR, 5.2L, 3.55 SG, auto.
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