[DeTomaso] 4.6 update

[Dave Doddek]

The torque drop off could also be due to the intake manifold I designed.
It is not optimal and I think with a better design I could make more power.
 We might try and design a different intake at a later date.

Dave "always experimenting" D


At 09:56 AM 11/13/2006 -0800, you wrote:
>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
>
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