ttriumphautos.com or triumphautos.net
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ttriumphautos.com or triumphautos.net
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TR8 compression Ratios, Using Rover 4.0 - 4.6 Heads & shim or composite head gaskets
Triumph Shows Events & Pictures
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The Performance Aspect of riding around in a British car Triumph cars engines are a paradox; fossils in engineering, but sturdy as Hammers and anvils because of it. They really respond well to modern performance updates, and the beauty is that they are not so complex you can't do it yourself. A added plus for Triumph: they used standard corporate parts across all the model lines.
Triumph engines of the sixties, seventies, and early eighties suffered mightily (as with most other cars, foreign and domestic) from emission control power losses. Low compression ratios, poor engine management controls where the way it was. Thankfully time has provided modern remedies not only to boost power, but also drivability, durability and dependability. Spitfire 4 Being a spitfire owner means, know the inside of a spits four cylinder Engine. By inference the information here should also be useful for GT6 and TR6 engines. They all bear a commonality. Carburetion SU and Zenith Constrictors (Carburetors) will not be covered here: While they can be setup to run fairly well. Their design of no accelerator pump (shot) can make fall/winter starts really hard on an (also, lower voltage cold) battery. Holley and Weber Carburetors are favorites and WILL be covered HERE. Down-draft, side-draft and suggested tuning, modifications. Weber DGAV What a great carburetor it is: Easy to set up and six months later it will still be setup. Has good all-around performance, and is dead reliable. Weber DCOE These sidreaft Carburetors are what all others compare too. Once Setup you WILL get performance, and Reliability. Holley Carburetors There are others used on a TR8. Rochester Quadrajet, Carter AFB, and their modern descendants. But on a racers car you will see no other brand than Holley.
Setting up Carburetors is where knowledge is either short or confusing. So we will try our rolled up sleeves-this is how "I learnt it", version . Click Here to go to the Carburetor Setup Page Ignition drive train
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