Tubular exhaust manifold for 411 S5

[Thomas591]

HI David,

I am totally with you. My aim is to improve the 400 engine, which was really not a very good piece of engineering, compared to his predecessors, because of the US emission restrictions.

I will use a camshaft with a duration which should be close to the original cam but with all the benefits of modern camlobe technology. My aim is to have the engine as smooth as possible but with improved low end torque and fuel efficiency.

Regards

Thomas

Originally Posted by dwomby

Hi, Thomas. Please pardon me if I echo Peter's words of caution. It's your car and you must do it the way you like but my car has a 360 with a performance camshaft. It's ok when up to speed but idling and at low speed it sounds like a US muscle car and not at all in keeping with the refinement I'd expect from a Bristol.

David