Paul Geithner’s 1968 Triumph Spitfire mk3

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This is my 1968 Triumph Spitfire, which I purchased in February, 2005.  My oldest son and I are rebuilding it together.  As of late 2007, we have modified and rebuilt the suspension, overhauled and fixed the brakes and electrical systems, aligned the doors, bonnet and other body pieces, and replaced the old engine with a remachined one and got it running on the road.  An overdrive 4-synchro transmission with D-type overdrive has been installed, and this car needs it! 


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 colors and scheme. 

 

Performance:

1600 lbs (w/o driver)

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: 25 to 35 mpg; frequent commuter car


engine:

1296 cc displ
acement, 9.5:1 compression, fully balanced (s/n FE20781E) from TSI

remachined block, standard bore and crank, w/ Vandervell trimetal bearings

AE Hepolite flat-top pistons and wrist pins on stock connecting rods

shaved stock head (p/n 515573) w/ stock rocker arms on AE Tuftrided rocker shaft

TSI275-4 grind cam: 0.425” max valve lift, 275° duration (see Triumph Spitfire cam specs)

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

stock flywheel


Fuel & Carburetion:

stock twin S.U. HS-2 carbs w/ Grose-Jet float bowl jets

#7 needles and "blue" dashpot springs w/ 10W-40 motor oil for dashpots






exhaust:

U.K. version 4 - 2 - 1 cast iron manifold/steel downpipe combo

custom fab’d 1 3/4 inch exhaust pipe

Cherry Bomb Oval Turbo II muffler w/ 2 inch center inlet, 2 inch offset outlet

(JC Whitney p/n ZX502055A)




Heating & cooling:

22“ wide radiator from a stock Spitfire 1500, stock mk3 fan w/ 180°F thermostat

stock passenger compartment heater






drivetrain:

new clutch kit (clutch/pressure plate/throw-out bearing)

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:

FRONT:

195 lb/inch coils, 9.25” free/6.25” installed height (stock 150 lb/inch Mark III springs

(p/n 214144) with 2 1/6 free coils removed)

front ride height lowered about 2” from stock for lower c.g., better suspension geometry and improved overall appearance (roughly level stance)

new stock shocks

7/8” anti-sway bar from a stock Spitfire 1500

wheel alignment: -1.5° Camber, zero Toe

standard rotors, brake pads, calipers and brake lines

REAR:

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, zero Toe

stock brake drums, standard brake shoes and brake lines


wheels & tires:

13x5.5” stock steel TR7 wheels w/ Spitfire 1500 hub caps

185/60-HR13 Sumitomo HTR 200 tires (380/A/A rating)

35 psi inflation pressure





frame & body:

Temporary paint job using spray cans of lacquer (“True Blue” and “White”)







electrical

AC-Delco 7127-9 alternator and aftermarket chrome alternator bracket

Group-58 size battery







interior:

Work in progress

retracting shoulder and lap belts from Spitfire 1500

 

click image for more photos