Matt, that is exactly what Mike (DC 4.7 Engine Designer) was saying about
the engine was supposed to accomplish. I have a peak TQ at 3950 and HP
peak around 4500 (stuck with the speed limiter at 97MPH) but flat curve.
-------------------------------------------
Steven St.Laurent
Test Engineer
Test Branch, GSD, MCTSSA
MARCORSYSCOM, USMC
760-725-2506 (DSN 365-2506)
Work:mailto:stlaurents@mctssa.usmc.mil
Home:mailto:saint1958@home.com
-----Original Message-----
From: WMBARRET@aol.com [mailto:WMBARRET@aol.com]
Sent: Thursday, January 04, 2001 9:43 AM
To: dakota-truck@buffnet.net
Subject: Re: DML: re: Acceleration and Axle ratios, James
Yep, You're right James, I've had mine on the dyno multiple times, and have
reported to the list before that the 4.7L makes gobs of torque down low, and
that power falls sharply after about 5500 rpms. My 4.7L is putting out close
to 300 ft lbs to the rear wheels at 3200 rpms, which is just as low an rpm
as
most 5.9's, and damn near as much TQ. Peak HP, 216+, is pretty steady
between
4000 and 5000. This makes for one helluva strong engine, down low, or up
top!
Matt Y2K-HEMI
'00 RC 4.7L 5spd
14.23 @ 94.49
In a message dated Thu, 4 Jan 2001 12:05:39 PM Eastern Standard Time,
Viper450hpGTS@aol.com writes:
<< In a message dated 1/4/2001 12:17:50 AM Central Standard Time,
miggitymike@fast4x4.net writes:
<< the 5.9 is detuned also.. it's a truck motor tuned just for truck use.
The
4.7 is designed from the ground up to make power, and being an OHC design
it
makes the power up high, not down in the low revs like a 5.9 pushrod motor.
All else being equal, there's no replacement for displacement. >>
I would have to disagree. The 4.7L makes lots of low end and tapers off
quite
rapidly in the upper rpms (doesn't pull very strong). Just because it can
rev to 6000 rpms doesn't mean it makes much power up there :)
James
'99 Flame Red RC Dakota R/T (ATI Procharged)
'01 Black 4.7L RC Dakota Sport (5-speed & 3.92 gear)
>>
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