[DeTomaso] Stage 1 - Complete!

[Paul - Home]

I was under the impression that all Panteras had a discrepancy between 
the odometer and the speedometer.  I know mine does.  I also remember a 
thread from years back that talked about this specifically and there was 
a place that would "fix" this feature.

Paul
#9270

michael at michaelshortt.com wrote:
> How can the odometer be right and the speedo be wrong?
> 
> Michael in Savannah
> 
> On Mon, Mar 31, 2008 at 5:19 PM, <MikeLDrew at aol.com> wrote:
> 
>> In a message dated 3/30/08 15 45 13, ea2010 at yahoo.com writes:
>>
>>
>>> 1. regarding the temp I was running ... it appears that - once warm - my
>>> cat like to run just a sliver under 200F. I did punch it from 80 MPH to
>> around
>>> 110 MPH on a few occasions (I couldn't help myself!) in which case the
>> temp
>>> would rise just a sliver OVER 200F. But, all in all, I would say the car
>> likes
>>> to run at 200F. I am wondering if this is a normal temp to expect?
>>>
>>>>> That is just about ideal.   The critical thing is to see what temp the
>> car
>> runs when stationary.   You've already demonstrated that the cooling
>> system
>> is capable of keeping temps where they should be when subjected to airflow
>> while underway.   If the temps are noticeably higher when you are stuck in
>> traffic
>> for a long time, the problem is the radiator fans--not the other
>> components
>> in the system.
>>
>> My car, like yours, runs around 200 degrees under all circumstances.   I
>> did
>> find that on extended high-speed runs through the desert (120 mph or so),
>> the
>> water temp would rise, then stabilize at about 230.   I think fitting a
>> front
>> air dam will have helped that situation, and I will also see about fitting
>> some additional ducting if I can see any areas where airflow is being
>> potentially
>> lost (such as blocking off the holes in the bottom of the valance).
>>> 2. RPM's ... my cousin and I both seemed to think the car was running at
>>> higher RPM's than indicated: 2000 at 65 MPH, 2200 at 75 MPH and 2500
>> (dead on)
>>> at 80 MPH. Without down-shifting, I was able to go from 80 to 100 MPH in
>> 5th
>>> without much pressure on the accelerator - immediate responsiveness. I
>> am
>>> thinking of getting the Tach tested and possibly re-calibrated. Would
>> you agree?
>>>>> Unless somebody has seriously revamped your gearbox, I would agree,
>> your
>> tach seems to be reading low.
>>> 3. speed ... at 90 MPH on the speedo, my hand-held GPS showed a speed of
>> 81
>>> MPH. I realize that the tires I am running (245/45 front and 335/35 rear
>> on
>>> 17" wheels) are one reason for the discrepancy; however, should the
>> speed be
>>> off by that much?
>>>
>>>>> That sounds normal.   My speedometer also reads about 8 mph high at
>> highway speeds, with 305/50-15 rear tires, but I think the odometer is
>> almost
>> spot-on.
>>
>> Mike
>>
>>
>>
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> 
>