[DeTomaso] ZF losses

[tony DiGiovanna]

I recall this topic.  There were indeed several documented experiences and a
number of variables, especially with respect to the configuration of the
engine when engine dyno'd.  For reasons I can no longer recall, I settled in
on a value of 17% difference, which I now use as my generally-accepted
conversion between engine dyno data and chassis dyno data for Panteras.

-----Original Message-----
From: detomaso-bounces at realbig.com
[mailto:detomaso-bounces at realbig.com]On Behalf Of Charles Engles
Sent: Tuesday, March 25, 2008 9:52 PM
To: chris terp
Cc: detomaso at realbig.com
Subject: Re: [DeTomaso] ZF losses


Dear Chris,


                Has anyone else had this experience?    Well, yes.    During
the discussion some time ago there were at least three forum members that
had flywheel and rear wheel dyno results on engine before and after
installation.  IIRC all the result were in the 20-25% range.    I,too, was
surprised, but is was a recurring number from different sources in all HP
ranges.


                                   Mystified too,  Chuck Engles
  ----- Original Message -----
  From: chris terp
  To: Charles Engles ; Will Demelo
  Cc: detomaso at realbig.com
  Sent: Tuesday, March 25, 2008 7:07 PM
  Subject: Re: [DeTomaso] ZF losses


  Really - 20%?  Has anyone else had this experience?  I think I'll need a
blower...or nitrous..or something...

  Chris Terp
  #6751  (finally found the number)

  Charles Engles <cengles at cox.net> wrote:
    Dear Will,


    Some time back there were several postings of engine dyno
    results on the dyno stand and on a chassis dyno. IIRC the average loss
of
    measured horsepower from the dyno stand to the chassis dyno was about
twenty
    percent loss. .
    Discussion was extensive as to where the twenty percent
    went: exhaust system restrictions, internal ZF friction, or etc. No
    consensus was reached except that there is an undeniable difference
between
    the dyno stand and sitting in your Pantera and that the sink for the
twenty
    percent loss contains various potential culprits.

    Warmest regards, Chuck Engles



    ----- Original Message -----
    From: "Will Demelo"
    To:
    Sent: Sunday, March 23, 2008 7:08 PM
    Subject: [DeTomaso] ZF losses


    > What are the dyno proven losses through a ZF?
    > Will
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