[DeTomaso] 4.6 update

[Richard Barkley]

Dave,

As expected from you, great engineering and execution. Congratulations!

However, I am a little surprised that the HP numbers weren't a higher 
even for the modest boost you are using. As you know, Zonkey's engine is 
a bone stock '99 4.6 Cobra engine (the EFI curves were not touched) that 
is getting 288 HP/ 251 TQ normally aspirated.
http://home.earthlink.net/~rlbpantera/misc/HpvsTQ.jpg
I realize that the Lincoln engine isn't rated as high as the Cobra (285 
vs. 320) but then the '99 Cobra had that "recall problem" because it 
really wasn't hitting 320.

Richard


Dave Doddek wrote:
<>

>4.6 Update
>
>I finally got the 4.6 project done.  It is tuned and headed back home with
>its owner.  Tuning went very well.  The SCT software to program the 4.6 was
>easy to use and even allowed me to datalog the wide band O2 sensor along
>with other data.  We took it to the dyno shop this weekend for a couple of
>pulls.  We wanted to check for any odd spikes or dips in the hp curve and
>test our muffler modifications.
>
>The horsepower results were pretty good.  We started with a 285hp engine
>stock.  No internal modifications.  We added long tube headers for the
>Pantera, a home made blower manifold and an Eaton supercharger with a 5.5
>lb pulley.  It made 284 hp at the wheels with 321 lbs torque at 3400 rpm.
>Really good torque and at a nice low value.  Torque was above 275 lbs from
>2000 to 5000 rpm.  The curves were very smooth with no areas to worry
>about.  But what was most interesting was the horsepower curve.  Instead of
>running up to peak and then dropping off like most engines, it went to 284
>hp at 5000 rpm and just stayed flat till 7000 rpm.  I expect we could of
>easily turned 7500 or 8000 rpm with the stock cams.  It would be neat to
>see what would happen with a better bottom end and more boost.  I bet this
>engine could easily make 400 at the wheels and turn 8000 rpm.  The engine
>sounded great with no pops or cutouts.  
>  
>
<snip>
-------
Sincerely, Richard Barkley

To Ski or not to Ski, that is the question!

Richard Barkley (310) 373-6695 (home)
E-mail: rlbpantera <atsign> earthlink.net
ZONKEY'S home page: http://home.earthlink.net/~rlbpantera
Mammoth Lakes Vacation Condo: 2BR+loft/3Bath - Horizons 4 #186 (760) 
934-6758
Condo web address: http://home.earthlink.net/~rbarkley