[DeTomaso] 4.6 update

[Dave Doddek]

The number seems low to me too.  The car runs really strong and will break
the tires loose at a roll in 1st gear.  It runs the 1/4 in the 12s.  But
the dyno only said 284.  I need to verify it in my g-tech.

One other thing to note, was the HP curve.  It only made about the same HP
as Zonky, but I had 40 lbs torque more at at 2500 rpm.  I also made total
HP from 5000 to 7000 rpm.  Yours ran up to a peak at 6100 then dropped off.
 So really, even though total HP was not any more, it had much more torque
and a much wider power band.

Dave "might try a 7 psi pulley" D




At 05:39 PM 11/10/2006 -0800, you wrote:
>    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.      
><>
> ------- 
> Sincerely, Richard Barkley
> 
> To Ski or not to Ski, that is the question!
> 
> Richard Barkley (310) 373-6695 (home)
><> 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
>