Triumph TR4 Specification

Prepared by Racetorations

 

 

 

Engine

• Fast road-rally camshaft (plasma hardened)
• Competition tappets
• Revised crankshaft oil seal
• Race prepared connecting rods (trued, lightened, rebushed, balanced and shot peened)
• Race prepared crankshaft (cross drilled, lightened, milled flanks, tuftrided, undercut mains, micro polished and balanced)
• Performance Omega pistons and strengthened liners
• Balanced crank, clutch, flywheel
• ARP bigend bolts
• Alloy rocker supports/spacers
• Chrome-Moly pushrods
• Steel head gasket
• Unleaded cylinder head (unleaded valve inserts, alloy silicone bronze guides, faced and ported)
• Racing stainless valves with competition springs
• High tensile deep head nuts (stainless steel)
• Alloy rocker cover
• Magnesium finned sump (with oil temp sender)
• Alloy water pump housing
• Competition high volume water pump
• Spin-on oil filter adapter
• Thermostatically controlled oil cooling
• 16 row oil cooler
• Thin belt pulley conversion
• Crankshaft harmonic damper
• High capacity oil pump
• Breather and oil catch tank
• Alloy sump guard

 

Exhaust

• Stainless race exhaust
• Stainless fast-road 4 -1 supersports manifold
• Ceramic manifold coating

Front Suspension

• Nylon bushes
• Road-rally Springs
• Adjustable top fulcrum (Set to 1.5 degrees negative camber)
• Pro-Spax racing shocks
• 7/8" anti-roll bar (nylon bushes, poly links)
• Quick steering rack
• Posibock aluminium rack mounting
• Poly steering column bushes
• One solid UJ in steering column
• Uprated TR6 steering column unions

Electrics

• Rally distributor - altered advance curve to suit camshaft
• Sports coil
• Lucas silicon leads
• Rev limiter
• Lightweight alternator (with heat shied)
• Cooling fan cutout kit (with over-ride switch)
• Hi-power lightweight starter motor
• Fibreglass battery box
• Cibie halogen headlights (100/80w bulbs with relays, up-rated wiring and pilot lights)
• Steering column main/dip/flash switch (from later Triumphs)
• Halogen brake lights
• Switched twin fuel pumps and cooling fan
• Electric windscreen washer pump

Interior

• Full FIA race cage (6 point with door bars & under dash hoop)
• 5 point FIA Luke race harnesses
• Ridguard rally seats (vinyl with cord center sections)
• Motolita steering wheel (polished alloy boss and centre)
• Additional oil temp gauge in centre instrument cluster
• Original Radiomobile radio (with FM conversion and iPod input)
• Driver/Passenger intercom
• Custom clutch foot rest
• Aluminium hardtop
• Double duck surrey top
• Aluminium fuel tank firewall
• Fibreglass gearbox tunnel (lined with heat resistant material)
• Map reading light
• Alloy pedals
• Halda Twinmaster and clock
• Passenger horn push

Gearbox

• Race rebuilt
• TR6 case and bellhousing
• Stag layshaft with double needle bearing
• J type uprated (28% reduction) overdrive
• Overdrive custom alloy gear knob with switch
• Electronic overdrive disengagement
• Overdrive warning light on dash
• Custom uprated gearbox mounting
• TR6 Clutch

Rear Suspension

• Rebuilt 'twin-piston' lever arm shocks
• Rose joint shock link
• Stainless steel front eye bolts in springs
• Nylon bushes
• Spring location Kit
• Double leaf rally rear springs
• 5/8" anti-roll bar, nylon bushes & rose links

Wheels

• 6J Racelite aluminium wheels
• Stainless steel wheel bolts
• Avon 185/70HR15 CR6ZZ tyres

Brakes

• Pagid blue pads
• M20 shoes
• Knifer pipes
• DOT 5.1 fluid
• Stainless steel braided hoses
• Alfin type rear brake ring

Fuel

• 2 x Facet electric pumps (switchable)
• Fuel pressure regulator
• In-line fuel filter
• Oil pressure fuel pump cutout switch
• Stainless braided hoses
• Twin Weber 45DCOE carburetors
• TWM aluminium inlet manifold
• Twin cable throttle conversion

Cooling

• Fibreglass radiator and air feed ducting
• 12" Pacet electric fan
• Uprated radiator core
• Silicone water hoses

History

• UK RHD Car
• Two previous owners
• Heritage certificate
• Original engine

Body

• Revised front wing drainage
• bumpers removed

Comments

[S Preiss]

It's got it all! Too bad no one makes an alloy crossflow head for this engine. Or do they?

[Valve Bounce]

Now I'm thinking it needs a LSD! I've seen a alloy head but not crossflow. You never know it might be done, people can't stop tweeking these old cars.

[STEVE CHAPMAN]

i have seen a crossflow head for these engines at Cambridge motorsport ex Bill Blydenstein !!!!

[Racetorations]

Paul, I think it is inappropriate to use Racetorations supplied photographs and technical data without any acknowledgement in your comprehensive text that Racetorations prepared your car.

Please acknowledge our copyright or remove the photographs.