Paul Geithner’s 1968 Triumph Spitfire mk3
The paint job you see is temporary, and accomplished with rattle cans of spray paint. The scheme is modeled after the racing Spitfires that ran so successfully at LeMans in the mid 1960s, and we intend to finish the car off with the same basic paint scheme.
Performance:
peak torque: TBD ft-lbs @ xxxx rpm (est.)
peak power: TBD bhp at xxxx rpm (est.)
acceleration (0 to 60 mph): TBD seconds
1/4 mile: TBD seconds
fuel economy: 27 mpg; frequent commuter car
lateral acceleration: TBD
engine:
remachined block (s/n FE20781E), standard polished crank, pinned thrust washers
stock flat-top pistons and wrist pins on stock connecting rods
stock flywheel
stock head (p/n 515573), shaved
ARP head studs, bronze valve guides, 3-angle valve grind
stock rocker arms on Tuftrided rocker shaft, stock push rods
TSI275-4 grind cam (275° duration, 0.425” valve lift; see Triumph Spitfire cam specs) w/ stock valve springs
stock Lucas 25D4 distributor with Pertronix Ignitor® 1149C ignition module and stock coil
custom fab’d Accel® spark plug wires
13° BTDC spark advance at 1000 rpm idle (w/ vacuum advance disconnected to set idle timing)
15W-40 API CI-4/SL motor oil
Fuel & Carburetion:
AAE needles and "red" dashpot springs w/ 10W-40 motor oil for dashpots
exhaust:
custom fab’d 1 3/4 inch exhaust pipe
DynoMax Thrush Turbo II oval muffler w/ 2 inch offset inlet, 2 inch center outlet
(Summit Racing p/n WLK-17702)
Heating & cooling:
stock passenger compartment heater
drivetrain:
rebuilt 4 synchro 3-rail transmission w/ D-type overdrive (s/n FH8563)
using 30 wt non-detergent motor oil
stock non-O/D sliding-shaft type driveshaft shortened 3.5 inches for O/D
stock 4.11:1 differential w/ 80W/90 sulphur-free gear oil
suspension & brakes:
300 lb/inch, 9 inch free length coil springs by QA1
(results in 7 inch installed coil length with car resting on level ground, lowering the front by about 1 inch from stock for improved suspension geometry and overall level stance)
Koni “Special” shocks (p/n 80-1388)
7/8” anti-sway bar from a stock Spitfire 1500
wheel alignment: -1.5° Camber, 3.5° Caster, zero Toe
standard rotors, brake pads, calipers and brake lines
modified mk3 transverse leaf assembly (dearched 1.5” by mixing and matching leaves)
Joe Curry’s Kastner design camber compensator
new stock shocks
wheel alignment: -3° Camber, 1/32” Toe-in
stock brake drums, standard brake shoes and brake lines
wheels & tires:
Sumitomo HTR 200 185/60-HR13 tires (380/A/A rating)
35 psi inflation pressure
frame & body:
electrical
Group-58 size battery
interior:
retracting shoulder and lap belts from Spitfire 1500
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