Who said it 'In fast out slow, in slow out fast' or something like that.
Charly Mitchel
----- Original Message -----
From: "Scott Janzen" <sjanzen@me.com>
To: "Bobby Whitehead" <igofaster@att.net>
Cc: "'Friends of Triumph' Triumph" <fot@autox.team.net>
Sent: Tuesday, January 24, 2012 7:11 AM
Subject: [Fot] GT6 Alignment and suspension set-up
> Bobby, I'll share how my suspension is set up, describe the handling, and
> pose a question of the group - what would optimize the handling/reduce
> understeer on corner entry?
>
> Car weight roughly 2100 lb w/ fuel, 200 lb driver/gear, corner weighted to
> optimize, but LF is still heaviest
> Tires 205/60-13 on 6" wheels, R888 Toyo Proxes, 21 psi front, 19 rear
> Front Susp 550 lb springs, 1.5 degrees negative camber. Tried 2.5
> negative on last outing, and got more even tire wear (less wear on outer
> 25%) but more twitchy steering and no reduction in understeer. Front bar
> 1" OD, solid, with about 13.5" lever arm. 1/16-1/8" toe out. All plastic
> bushings.
> Rear Susp: stock spring(I think), with spacer on diff to lower about 3/4",
> 1 degree negative camber, 1/16" toe-in, 5/8" OD anti-roll bar with 9"
> lever arm. Welded diff. Every connection on "stock" rear susp elements
> is a rod end except for the lower a-arm connections to the upright, full
> IRS w/ rotoflex replaced by ujoints.
>
> The car understeers on corner entry, more as I go faster, and more on
> tighter turns (welded diff). Jason tells me it's my driving style - I
> carry a lot of speed into the corners, trail braking, and the car pushes
> going in, can hear the front tires protesting. At the apex, when I get on
> the gas, the balance shifts rearward, the front tires get quiet, the backs
> start making noise and the car points where I want it to go.
> I'd like to reduce the understeer on turn-in. Have increased the rear bar
> stiffness, which did not reduce understeer but made the transition to
> oversteer more dramatic! Adjusting tire pressures up and down has not
> made a material difference.
> So, anything else I should try adjusting? Or, just acknowledge the nose
> heavy nature of the car and get my braking done in a straight line, go
> slow on entry and get on the gas early?
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