Whats that about then? CAT LeMans Diesel, feckin miniscule ex housings compared to the compresser, even if it was a petrol youd say they tiny, never mind a oil burner

Lovely mota tho

 

alrite.

no always quite small on the old diesels mate

 

I always thought they were small on diesels!

A 2ltr diesel runs a T2 sized turbo for instance, whereas a petrol 1.6 will run this.

 

Thats due to compressor air flow reasons, a 1.6 petrol engine can flow much much greater volume of air than a 2 litre diesel.

 

"Think" its becasue you want a fairly narrow power band on CI

 

Lower revs? Lower exhaust temps?

 

Loveley looking Engine


If my understanding of pulse tuning is correct then:-

exhaust gas are made up of a series of pulses, and the runners on the manifold will have been specifically tuned to allow exhaust pulses to line up and enter the exhaust housing denser.

Denser = more compressed and therefore the lesser the need for size.