Triumph V8

Triumph V8

Infobox Automobile engine


name = Triumph V8
manufacturer = Triumph Motor Company
type = 90 degree V8
production = 1971 - 1977
predecessor =
successor =
bore = Auto mm|86|3
stroke = Auto mm|64.5|3
displacement = 2997 cc
length =
width =
height =
weight =
block = cast iron
head = aluminium
valvetrain = single overhead cam
fuelsystem =
fueltype = petrol
oilsystem =
coolingsystem = water
power = Auto bhp|145|0 @5500 rpm
torque = Auto ftlbf|170|0 @3500 rpm
compression = 8.8:1
fuelcon =
specfuelcon =
oilcon =
similar = Triumph Slant-4 engineThe Triumph V8 is a 3.0 litre V8 developed in house by Triumph for the Triumph Stag. This was basically two Triumph Slant-4 engines 'stuck' together. It consisted of a single overhead cam cast iron block with aluminium heads.

This engine can suffer from unreliability as a result of the following design problems:

*Overly long single link chains with poor tensioning that only last about convert|25000|mi|km|-2. The damage is extensive if they fail;
*Inadequately sized main bearings - these have short lives as a result;
*The aluminium heads warp due to poor castings which restrict coolant flow, leading to overheating;
*Water pump failures relating to the drive gear shearing.

Many modern day upgrades and sticking to the manufacturers recommended service schedules help to solve these problems. An air dam for a TR-6 helps solve a cooling problem by scooping up the air in front of the car. A 12 blade fan helps to pull more air though the radiator.

On a side note the V8 was substituted for the Triumph 6-cylinder engine unit in the Triumph Stag. The Triumph Stag was originally envisioned as having the 6-cylinder 2.5 litre PI engine as used in the Triumph TR5.

ee also

*Triumph Motor Company
*Triumph Slant-4 engine

References

*Observer's Book of Automobiles P. Olyslager. 1972 Frederick Warne, London. ISBN 0-7232-1508-1


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