I am getting ready to put some 17" wheels on my 88GT and need some good overall alignment specs for street use. I have 2 88Gt's and I am not happy with the alignment on either one. One has a tendency for understeer during hard cornering but is really stable a high speeds. The other is much more responsive and more neutral but is hard to keep in a straight line at high speeds. I would like something in between the two. Any suggestions?, Thanks Robert

Welcome to the forum! There's a search feature that will help you find most anyting you can imagine. There's been a LOT of discussion about alignment settings over the years. Here's a few links I found in a quick search.

https://www.fiero.nl/forum/Forum2/HTML/037347.html
https://www.fiero.nl/forum/Archives/Archive-000001/HTML/20020208-2-011628.html
https://www.fiero.nl/forum/Archives/Archive-000001/HTML/20031110-2-037347.html

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Wheel Alignment Specification Page 3A-5 (1988 Fiero Service Manual)
Specifications For Diagnosis
For Warranty Repairs Or
Customer Paid Service
Toe Front (Service Checking) Service Settings
Deg (Per Wheel) 0.3 deg +/- .2 deg Total 0.3 deg Total

Camber Front 0 deg +/- .5 deg 0 deg

Caster Front 5.0 deg +/- .5 deg 5.0 deg
(GT & Formula)

Camber Rear -1.0 deg +/- .5 deg -1.0 deg +/- .5 deg

Toe Rear .15 deg +/- .1 deg .15 deg +/- .1 deg
Deg (Per Wheel)

Notes:
Front toe adjustments to be set separately per wheel, with steering wheel held in "straight ahead" position within +/- 5.0 deg.

Front and rear cross car camber must be within 0.75 deg.

Front cross car caster must be within 0.75 deg.

Tie rod boot must not be twisted and must be seated in the tie rod groove.

FYI
My 1988 GT Autocross / Daily Driver alignment specs:

Front Toe: 1/8" Toe Out
Front Caster: +5.5 deg - Just can not get enough CASTER, Target is +6 to +6 1/2 deg.
Front Camber: - 1.5 deg

Rear Camber: -1.5 deg
Rear Toe: 1/8" Toe In

Thanks for the replies. just the info I was looking for, Robert

quote Originally posted by Solo2: Notes: Front toe adjustments to be set separately per wheel, with steering wheel held in "straight ahead" position within +/- 5.0 deg.

I believe this is a correct quote from the shop manual, but the manual has a typo itself. Shouldn't that be +/- 0.5 deg.?

No it is not a misprint. It is talking about the position of the steering wheel. If you put a large degree wheel on the steering wheels. The +/- 5 degrees is close enough for alignment purposes. It means to position the steering wheel by hand or quess work to be straight. The rack inside bushings tolerances are within +/- 2 degrees to it does not matter.