I had my 2001 R/T dyno this month too. I punched it without O/D and ran it all
the way up to it's speed limit :) around 110mph which sucks! At the time I had
around 4k on the motor on a stock truck. Somehow it adjust my hp figures down
to around 208hp and 302tq on that day, plus it was a sizzling 105F at the time!
Well I was just told my power figures needed to be adjusted. 8% off! Here are
the new stats!
224hp 327.6tq @ the wheels!
SAE Corrected without the 8% adjustment.
Run1: 207.7 hp 303.4 tq Stock
Run2: 208.1 hp 302.0 tq Open Throttle body
Run3: 204.1 hp 300.1tq Stock
After hitting second gear it nailed the dyno for a whopping 400tq :) LOL of
course that's not the 327tq rating it counted.
BTW this engine run's great at 3400's threw 4500rpms then drops. Max tq was
around 3500rpms and max hp was at 4000rpms.
I need to find time to post my dyno sheet, just been too busy! I just got back
from Oshkosh in WI from the EAA expo.
I might do a first time track run with a co-worker after work The dyno tech told
me I might be able to pull off 14's or low 15's.
I hope so, I don't expect that great of time with the elevation and temp here in
Wichita, KS. I need to go back to Houston to race ;)
Anthony
Jayson Woodruff <woodrufj@yahoo.com> on 07/21/2001 06:25:52 PM
Please respond to dakota-truck@buffnet.net
To: dakota-truck-moderator@bent.twistedbits.net
cc: (bcc: Anthony Gonatas/KS/ARS/US/AON)
Subject: DML: Jay's 4.7L, Dynoed
I finally got down to the Dyno.
4.7L Auto 2wd, equipped with all those California Cats, rated at 230hp
stock.
Horse Power mods: Po' Boy K&N intake, Gibson/flowmaster hybrid exaust,
Jet stage II chip.
Here's the website where I posted my 2nd through 4th runs
http://www.geocities.com/woodrufj/dakota/dyno_page.html
What this doesn't show is my first run. It looked very similar to the
others, but had a cute little spike at the peak that topped my run to
201hp. But I didn't get that graph from them. More realistic graphs
put me at about 193hp at the wheels. If I back out the auto tranny
losses (20-25%) I get 241 to 257 hp. Not too shabby. Torque maxed out
at the wheels at about 250ft-lbs, which puts it at 312 to 333ft-lbs.
You guys that have dynoed the 4.7 auto, what gear did you run in? I put
it in second and gassed it but if I started below 3500rpms the tranny
would down shift. I new in "D" it'd down shift all over the place.
Starting at 3500rpms meant I started after my peak torque, so I don't
really have a good peak torque out of all this.
Jay W
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