Once the turbo took over, a bypass let the blower idle. Details matter

IN THE SPIRIT OF BOD AND JENKS

Editorial

+44 (0) 20 7349 8484
[email protected]
18-20 Rosemont Road, London NW3 6NE, UK

Editor Joe Dunn
Editors-at-Large Simon Arron and Gordon Cruickshank
Grand Prix Editor Mark Hughes
Art Editor Owen Norris
Chief Sub-Editor Lee Gale
Digital Editor Dominic Tobin
Digital Writer James Elson
Contributing Editors Andrew Frankel, Doug Nye and Mat Oxley
Special contributors Simon de Burton, Robert Ladbrook, Damien Smith and Gary Watkins
Picture Libraries DPPI, Getty Images and Grand Prix Photo

Advertising

+44 (0) 20 7349 8484
[email protected]

Commercial Director Sean Costa
Commercial Manager Mike O’Hare
Advertising Manager Paula Trainor

Publishing

Managing Director Giovanna Latimer
Financial Controller Niall Colbert
Accounts Assistant Kevin Trethewey
Head of Digital Zamir Walimohamed
Subscriptions Marketing Manager Samantha Nasser
E-Commerce & Marketing Manager Michael Huntington
Marketing Executive Sohaib Anjum
Customer Service Manager Roshan Juglall


Proprietor Edward Atkin CBE
Founder Editor Bill Boddy MBE


Details matter.

Lancia Delta S4 Engine

Lancia Delta S4 Engine

Alamy Stock Photo

Our Group B story features Lancia’s Delta S4 which boasted ‘twincharging’. Its big turbo only came on strong at high revs leaving a low-speed torque void so, lacking today’s electronic anti-lag systems, Lancia plugged this gap with a supercharger and complex pneumatic valving. Air from the turbo went through an intercooler, then the supercharger, into a second cooler and finally the intake. Once the turbo took over, a bypass let the blower idle, cutting its power use by 90%.

You may also like

Related products