[DeTomaso] Dyno Numbers and Throttle Sticks

[tony DiGiovanna]

Couple more items to consider:
I've seen some carb spacers and/or under-carb mounted thermal shields that
can interfere with bits of hardware on the throttle shafts.  In one case on
the side opposite of the throttle cable linkage where you aren't looking so
much.

You say your cable is new, so not likely, but for others to consider:  An
older cable will sometimes break a strand or two somewhere along its length
which will intermittantly hang up inside the sheath.

Another item to check, if all the others haven't panned out, is to check
that the throttle plates themselves are not dragging on whatever is under
the carb (spacers, manifold, etc.)

With your rev limiter, you are in pretty good shape, but without it:
Everyone's instinct is to stay in the clutch when this happens - kaboom.

Had this happen to me twice 10 years ago before I found the first condition
above.  Luckily, the wimpy hydraulic cam/spring combo I had floated the
lifters early enough to limit the rpm, but somehow avoided piston/valve
contact.  Engine survived for years afterward.

-----Original Message-----
From: detomaso-bounces at realbig.com
[mailto:detomaso-bounces at realbig.com]On Behalf Of Trevor Fougere
Sent: Monday, February 11, 2008 1:31 PM
To: detomaso at realbig.com
Subject: [DeTomaso] Dyno Numbers and Throttle Sticks


Well...after almost 3 weeks of unrelenting rain...I finally got the car up
to be dyno tuned last week.

383 HP and 388 FT-LB at the wheels.  For a FRP Windsor 392, Holley 750, Hall
Windsor Headers, Pantera Performance Pre-L exhaust, Pantera East Billet
Aluminum Wheels, Michelin Pilot Sport 335/35/ZR17 tires.

Engine:
http://www.fordracingparts.com/parts/part_details.asp?PartKeyField=9280

The dyno chart: http://www.fougere.com/pantera/images/dyno.jpg

Dyno page: http://www.fougere.com/dyno.asp

This puts the numbers at the flywheel...assuming 15% loss...at 451 HP, 457
FT-LB Torque.  Not the most powerful Pantera on the planet...but more than
adequate for a raconteur like myself.

During the tuning session, my throttle managed to stick one time.  This has
since recurred one more time at WOT shifting from 4th to 5th.  Don't ask
where. Shifting into neutral and kicking the pedal knocked the throttle
right back down immediately.  I have a 6K rev limiter on the MSD 6AL, but
wasn't expecting to use it under quite these circumstances.

Needless to say, I want to address this immediately.  I have been told to
try a motorcycle shop for some kind of lubricant that gets attached to the
cable.  The throttle cable is brand new.  I'm open to suggestions...

Thank you in advance

Trevor Fougere
#3797
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