[DeTomaso] 4.6 update

[Richard Barkley]

Dave,
No question that the "area under the curve" is much better than 
Zonkey's. Which is probably why it can run in the 12s with "only" 284. 
It will be interesting to see what the g-tech says but my guess it that 
the dyno is accurate. The interesting thing to me is how quickly your 
torque starts to drop after the peek at 3500 rpm. To me that says the VE 
is really falling off early which is probably due to the cams in the 
Lincoln.
Richard

Dave Doddek wrote:

>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
>
>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
>>   
>>    
>>
>
>  
>

-- 
----- 
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