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Re: [Tigers] Stopping Distance

To: robertdhogan@gmail.com, tigers@autox.team.net
Subject: Re: [Tigers] Stopping Distance
From: MWood24020@aol.com
Date: Wed, 19 Jun 2013 23:51:29 -0400 (EDT)
Delivered-to: mharc@autox.team.net
Delivered-to: tigers@autox.team.net
Full-name: MWood24020
Not a tire issue, then, as the Z1 Star Spec was right at the top of  ultra
high performance street tire category (since replaced with the Z2, which  is
even better).

The next thing I think about is suspension geometry, wheel rates and
anti-dive...I forget what Tim did with that car, did it also have a torque
arm?
;-)


In a message dated 6/19/2013 8:17:07 P.M. Pacific Daylight Time,
robertdhogan@gmail.com writes:


In  a later article (#12 of the Flying Tiger by Tim Suddard) on
Strengthening and  Upgrading Our sunbeam Tigerbs Chassis, the author refers
to using
195/55R15  Dunlop Direzza Sport Z1 Star Spec tires.  Whether those were the
same  tires quoted as stopping in 160 feet (nee the 150 of expected
improvements  with biasing) is to be determined. These tires would seemingly
not be
accountable for such poor stopping performance unless I error in the
assumption of a compound not within the extreme of highest mileage and low
adhesion.
Rob


From:  MWood24020@aol.com [mailto:MWood24020@aol.com]
Sent: Wednesday,  June 19, 2013 10:54 PM
To: robertdhogan@gmail.com;  tigers@autox.team.net
Subject: Re: [Tigers] Stopping  Distance


I  think you hit on the key: tires. Whether oem front caliper/rotor or
aftermarket, generating enough clamping force to exceed mechanical grip is not
a problem. I would guess the kit used included a proportioning valve, to
allow  better balance, and perhaps had better modulation which is where any
improvement in stopping distance likely was found.




In a  message dated 6/19/2013 7:43:02 P.M. Pacific Daylight Time,
_robertdhogan@gmail.com_ (mailto:robertdhogan@gmail.com)   writes:

In  the process of scanning some Classic Motorsports articles on a  Tiger
restoration, I noticed the author referring to the improved  stopping
distance of the project Tiger as 150 feet from 60 to 0 mph  after
installation of the Wilwood Engineering brake kit.  Even the  124 foot 60-0
stopping distance of a heavier Nissan Sentra in a Motor  trend test, as the
worst in its class, performs better than the quoted  Tiger result.

I have yet to research the details or what tires,  temperatures, surface
conditions or measurement accuracies were involved  in the article's number.
Could anyone shed some light on whether Tiger  stopping distance data exists
elsewhere in the plethora of recorded Tiger  documents?  The importance is
that a $1200+ Wilwood front brake kit  addition hardly seems worthwhile if
the stopping performance isn't more  remarkably improved than hauling a 2560
Lb. SunbeamTiger down from 60 mph  in under 120 feet much less  150.



Rob

..1560
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