DEEP SOURCE PASS · 2026-07-20
DATA GRADE A

Harris Auto Racing

IMCA / open-wheel modified (two published eras). Numbers below come from public manufacturer sheets or sanction rulebooks. We do not invent missing values.

Wheelbase

VALUE
Not printed on Harris baseline sheets we retrieved
IMCA modified wheelbase is rulebook-limited by series; Harris PDFs publish panhard/J-bar/4-link not overall WB
Harris baseline setup sheets 2007–2015 & 2016+

Published geometry & baseline numbers

Panhard (2007–2015)
23.5" @ 14° · 3" below axle center
Harris Baseline Setup 2007–2015
J-bar (2007–2015)
19.5" · 6" up on frame · center of pinion
Harris Baseline Setup 2007–2015
4-link top/bottom (2007–2015)
16" C-C top · 14" C-C bottom
Harris Baseline Setup 2007–2015
Pull bar (2007–2015)
34" · 7–8.5° pinion angle
Harris Baseline Setup 2007–2015
Scale (2007–2015)
54% left / 56% rear · wedge 60–100#
Harris Baseline Setup 2007–2015
PSI (2007–2015)
LF 10 / RF 15 / LR 10 / RR 14
Harris Baseline Setup 2007–2015
Stagger (2007–2015)
0–1" front · 1–2" rear
Harris Baseline Setup 2007–2015
Caster/camber (2007–2015)
C: LF+1.5 RF+3.5 · Cam: LF+4 RF−6 · toe ½" out
Harris Baseline Setup 2007–2015
Panhard (2016+)
30.5" @ 14° · 3" below axle center
Harris Quick Reference 2016+
J-bar (2016+)
21.5" · 6" up on frame · center of pinion
Harris Quick Reference 2016+
4-link (2016+)
LT/RT 18" C-C · LB/RB 15" C-C
Harris Quick Reference 2016+
Scale (2016+)
55% left / 54% rear · wedge 120–140#
Harris Quick Reference 2016+
PSI (2016+)
LF 12 / RF 16 / LR 12 / RR 15
Harris Quick Reference 2016+
Stagger (2016+)
0–1" front · 2–3" rear
Harris Quick Reference 2016+
Harris manuals: J-bar height/angle strongly influences body roll and side bite (Modified Setup Manual).

Primary sources

· Harris Baseline 2007–2015
· Harris Quick Reference 2016+
· Harris Modified Manual (2016 Current)
Always verify against your exact year chassis and series rulebook. Setup sheets change by year.
LOAD INTO GARAGE
Interactive mid-window card
FAIRBURY DEMO → PREFILL CHASSIS

Manufacturer correction

If a number is wrong for a specific year, email the correction with a sheet PDF. We will update grade and sources.

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