[TPR] 4 TO 4.5 NEG CASTER WITH PPC

Mon Apr 4 13:56:53 PDT 2022

GUYS,

Caster is what makes your steering wheel return to and become neutral in a straight driving condition.

Adding caster will make the Pantera more stable going in a straight line at speed

Adding Caster will also give more front end grip cornering to a point, but will also make the car harder to steer into a corner and may tend to whip the steering wheel back into a straight running position.

Stock Caster is about +2 degrees

ADD Offset front suspension bushings add 1-1/2 degrees

Shave the Upper Ball Joint and add a .100 shim, add 1 degree

Without modify the A-Arms we can get about 4-1/2 degrees

Rear weight biased Porsche’s run 6-9 degrees of positive front caster

Larry Stock

Pantera Parts Connection LC
550 Mallory Way
Carson City NV 89701

www.PanteraParts.com
PH  775-283-4411
Fax 775-283-4410
Cell 1-800-DeTomaso 800-338-6627

From: TPR <tpr-bounces at teampanteraracing.com> on behalf of Charles Engles via TPR <tpr at teampanteraracing.com>
Reply-To: Charles Engles <cengles at cox.net>
Date: Monday, April 4, 2022 at 1:38 PM
To: 'DENNIS ANTENUCCI' <TEAMPANTERA at yahoo.com>
Cc: <tpr at teampanteraracing.com>
Subject: Re: [TPR] 4 TO 4.5 NEG CASTER WITH PPC

Dear Dennis,

                 How much positive caster do you have now?   I am keen to know if you will perceive a difference and improvement. 

                 I would note that our friend Tom Upton was running positive 5-7 degrees and he noted another bit of improvement with the SACC electric power steering unit.  If Tom recommends power steering with big positive castor, then it might be a consideration.

                            Warmest regards, Chuck Engles

From: TPR [mailto:tpr-bounces at teampanteraracing.com] On Behalf Of DENNIS ANTENUCCI via TPR
Sent: Monday, April 04, 2022 2:39 PM
To: tpr at teampanteraracing.com
Subject: [TPR] 4 TO 4.5 NEG CASTER WITH PPC

Afternoon TPR

FWIW 

While I already purchased Johnny Woods modified A-Arms where I hope to get 5-7 degrees neg caster…..here is Larry’s mods where he got 4 to 4.5 neg caster. 

Dennis

Sent from Mail for Windows

From: Larry Stock
Sent: Monday, April 4, 2022 10:48 AM
To: DENNIS ANTENUCCI
Subject: Re: QUARTER WINDOW RUBBERS

I got 4 & 4.5 degrees of caster with the offset bushings and shaving the upper front ball joint.

02001PPPC Front Upper Ball Joint Modified for + Caster135.00

I think the Pantera may want up to 6-9 degrees of front caster.

Here are the A-Arm Sectioning and spacer photo’s I have you can work with.

Do you have ASA’s Address handy?

Larry Stock

Pantera Parts Connection LC
550 Mallory Way
Carson City NV 89701

www.PanteraParts.com
PH  775-283-4411
Fax 775-283-4410
Cell 1-800-DeTomaso 800-338-6627

On Apr 4, 2022, at 10:23 AM, Larry Stock <larrys at panteraparts.com> wrote:

I have both, I assume you probably want a good used one.

Larry

Regarding my Pantera underside downforce work, Here is an excerpt from

https://www.hagerty.com/media/motorsports/are-f1-and-nascar-manufacturing-drama/?utm_source=SFMC&utm_medium=email&utm_content=MED_UN_NA_EML_UN_SaturdayRoadTrip&hashed_email=fb1f43ec025e8215388f0ce0823a6e37e643701df67837453081ee2c33561ece

For the first time since the 1980s, when F1 cars resembled upside-down airplanes, ground effects are utilized in the aero regulations for the new car. Its floor has two large channels running front-to-back. Air travels under the vehicle and through the Venturi-shaped channels, which creates an area of low pressure and “sucks” the car to the track. Since the underside of the car provides much of the grip, the need for air on the wings to generate downforce is reduced. 

_______________________________________________ TPR mailing list TPR at teampanteraracing.com http://teampanteraracing.com/mailman/listinfo/tpr_teampanteraracing.com 

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