Hi guys n girls.

Wee question.

Back in the day when Custom Car was king and I bought Street Machine Magazine, power mods invariably started with bigger carbs and a lumpy camshaft (usually fast road cam).

Nowadays, you get ecu's, air intakes, exhaust upgrades as the way forward.

What is the reason for this?

Can the standard camshafts be replaced for power versions?

Is this a waste of limited funds?

Do modern engine management systems not accept the re-profiled cams?

Just wondering.

on turbo engines, cam profiles & valve lift is less of an issue until you want bigger turbos as the air is forced into the cylinder anyway.

you can get a far bigger increase in power than you would with just cams on a NA car by increasing boost pressure.

induction & exhaust are there to allow the air to flow more freely & the ecu upgrade is to allow for fueling at higher boost & also gives more aggressive ignition timing maps also.

 

if your going bigger turbos then longer duration/higher lift cams are still required!

Thanks mate.

Very informative.