[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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