[Supras] 57 trim driveability

[Walker, Brian (Rich. Dist)]

I think you'd do well with some training then Bernie (and have a bunch
of fun doing it) There are books that help to like anything else, text
only teaches on side of it. Couple that with the real world aspect and
you'll learn a lot.

One tip I found that might help: Picture strings connecting each side of
the steering wheel to the accelerator. Wheel straight=pedal planted. As
the wheel is turned, the pedal will have to come up with the string or
it'll break (see the metaphor to traction?) Same goes for braking.
May have to picture a variable tension rubberband vs. the string since
turbo throttle response is a little different but you get the idea :)

-----Original Message-----
From: berniek at technicaldevelop.com [mailto:berniek at technicaldevelop.com]

Sent: Wednesday, January 30, 2008 10:47 PM
To: Walker, Brian (Rich. Dist); Supras at supras.com
Subject: Re: 57 trim driveability

Brian:


    No doubt you are correct in the most absolute sense regarding
learning the means by which to control power delivered to the driving
wheels.  What makes matters difficult is the fact that spoolup to 18 PSI
occurs almost "digitally" as written previously, probably due to the
fact that I did not have the turbine wheel clipped (wastegate passage
was opened up instead).  That consideration coupled with extreme
non-linearity in power output vs. throttle position makes spirited
driving in corners a real challenge.  Despite being older than most
here, I do have fast reflexes, which show up in differing aspects of
activities such as automotive and motorcycle accident avoidance, and
music performance sightreading.  Although now in storage gaining value,
I did controllable wheelies with my '70 Honda CB750, pre-K series,
bought new (My present ride is an 1100cc Goldwing Interstate). 


    I guess what I'm trying to state is that in a sense, spoolup within
a very small RPM range (2800~3200) coupled with throttle non-linearity
seems almost like an artificial impediment.  Yes, I know it is the
character of the car now ('91 with mods as described), and maintaining
controllability on the edge of a dry pavement drift was much easier
(albeit slower) with my former '90, which was essentially stock. 


    Ultimately an answer will come out of this, either in terms of
increased learning effort on my part or by some means of driveability
assist, if you will.  As stated, Ford attacked this problem over 40
years ago by throttle linkage based non-linearity introduction when the
Paxton blown 312 CID Y-block V8 was introduced to compete with the Chevy
and Pontiac Rochester constant flow fuel injection system.


    Bernie