[DeTomaso] 5481 New heart beat

mark skwarek ehpantera at yahoo.com
Sun Aug 3 12:48:07 EDT 2014


The specs that I have at the moment are:

384 cui. bored 0.040"  over and stroked
A3 heads. What I like about these is that they will use the same valves etc. as std. 4v heads.
Ford Motorsport 331 intake
Carne roller lifters and rockers
Stud girdle
Bushed right side lifters 0.020" orifice. Left side uses one 0.040" restrictor. 
Forged rotating assembly, internally balanced.
11:1 compression
830 annular discharge Holley with a 1" spacer. Refer to Dave's email for specific one.

I don't have the specs on the cam  at this moment. 

Dan Jones might be willing to make some comments. 

Mark
 


On Sunday, August 3, 2014 12:36 PM, Boyd Casey <boyd411 at gmail.com> wrote:
  


Mark,
What are the specs of your build? Are you using solid lifters?
Thanks,
Boyd




On Sun, Aug 3, 2014 at 12:08 PM, mark skwarek via DeTomaso <detomaso at poca.com> wrote:

   I have had some issues with my former engine's build. I decided to send
>   it to Mclains Automotive in Cuba, MO. I can't say enough about how
>   great it is to work with Dave and Dan on this project. The results are
>   beyond my expectations.
>   Dave Mclain wrote:
>   I've been doing some work on the engine this morning and so far I'm at
>   600 horsepower at 6650rpm and 517lbs/ft torque at 5000.  Best combo so
>   far is with 30 degrees timing and an HVH 1 inch merge spacer.  Here's a
>   screen capture from a pull that I made a few minutes ago.  I'm going to
>   break for lunch soon but I think I might mess with the jetting a bit
>   and call it good.  This is with Dan Jones' Pantera headers flowing into
>   a 2.5 inch glasspack muffler.  Another thing I want to do is change the
>   bushing in this distributor to shorten up the curve which is way too
>   long.  This will help to make the idle more consistent and I don't
>   think it'll make it tough to start hot.  It would be best locked out
>   but I don't know if you have a provision to spin the engine and then
>   light the spark.
>   For the next pull I swapped on my 950 HP that was built by Competition
>   Carburetion just to see what was "in" the carburetor.  The engine made
>   the same overall torque numbers but picked up 17 horsepower at the
>   peak.  This carburetor is not necessarily the ultimate Holley or
>   anything but it was built to be a good all around carburetor for
>   testing on lots of different engines.
>   Dan Jones wrote:
>   That's with the smallest cam I ran through Dynomation.  The simulation
>   prediction was for just under 600 HP and Dave thought that might be a
>   bit optimistic.  I was pretty sure we'd get close to 600 HP but 617 HP
>   through the mufflers is impressive, not to mention how flat the torque
>   curve is.  Those old Ford Motorsport heads really work well.  Looking
>   forward to how it performs in your Pantera.
>   Mark
>   5481
>
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>
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-------------- next part --------------
   The specs that I have at the moment are:
   384 cui. bored 0.040"  over and stroked
   A3 heads. What I like about these is that they will use the same valves
   etc. as std. 4v heads.
   Ford Motorsport 331 intake
   Carne roller lifters and rockers
   Stud girdle
   Bushed right side lifters 0.020" orifice. Left side uses one 0.040"
   restrictor.
   Forged rotating assembly, internally balanced.
   11:1 compression
   830 annular discharge Holley with a 1" spacer. Refer to Dave's email
   for specific one.
   I don't have the specs on the cam  at this moment.
   Dan Jones might be willing to make some comments.
   Mark
   On Sunday, August 3, 2014 12:36 PM, Boyd Casey <boyd411 at gmail.com>
   wrote:
   Mark,
   What are the specs of your build? Are you using solid lifters?
   Thanks,
   Boyd
   On Sun, Aug 3, 2014 at 12:08 PM, mark skwarek via DeTomaso
   <[1]detomaso at poca.com> wrote:

        I have had some issues with my former engine's build. I decided
     to send
        it to Mclains Automotive in Cuba, MO. I can't say enough about
     how
        great it is to work with Dave and Dan on this project. The
     results are
        beyond my expectations.
        Dave Mclain wrote:
        I've been doing some work on the engine this morning and so far
     I'm at
        600 horsepower at 6650rpm and 517lbs/ft torque at 5000.  Best
     combo so
        far is with 30 degrees timing and an HVH 1 inch merge spacer.
     Here's a
        screen capture from a pull that I made a few minutes ago.  I'm
     going to
        break for lunch soon but I think I might mess with the jetting a
     bit
        and call it good.  This is with Dan Jones' Pantera headers
     flowing into
        a 2.5 inch glasspack muffler.  Another thing I want to do is
     change the
        bushing in this distributor to shorten up the curve which is way
     too
        long.  This will help to make the idle more consistent and I
     don't
        think it'll make it tough to start hot.  It would be best locked
     out
        but I don't know if you have a provision to spin the engine and
     then
        light the spark.
        For the next pull I swapped on my 950 HP that was built by
     Competition
        Carburetion just to see what was "in" the carburetor.  The engine
     made
        the same overall torque numbers but picked up 17 horsepower at
     the
        peak.  This carburetor is not necessarily the ultimate Holley or
        anything but it was built to be a good all around carburetor for
        testing on lots of different engines.
        Dan Jones wrote:
        That's with the smallest cam I ran through Dynomation.  The
     simulation
        prediction was for just under 600 HP and Dave thought that might
     be a
        bit optimistic.  I was pretty sure we'd get close to 600 HP but
     617 HP
        through the mufflers is impressive, not to mention how flat the
     torque
        curve is.  Those old Ford Motorsport heads really work well.
     Looking
        forward to how it performs in your Pantera.
        Mark
        5481
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     DeTomaso mailing list
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