Marcos has upgraded the 13B to a later model and more durable S6 spec engine rebuilt by Promaz. Still using the same Garrett turbo and on pump unleaded, a slight boost increase has seen the extend port engine generate 400hp to the wheels.

1976 Mazda 808 street wagon | JAP-808
Motorsport Connections | http://mscn.com.au
Engine: Mazda 13B S6 extend port by Promaz.
Turbo: Garrett GTX3576 @ 14psi
Exhaust: turbo back, 3″ side pipe.
EFI: MicroTech LT10s, 98-ron unleaded
Gearbox: RX-7 S4
Diff, Toyota Hilux LSD, billet axles
Suspension: Leaf springs, Caltracs
Tyre: MT 225/50/15 street radials
Power: 300kw / 400hp @ wheels
Best ET: 10.65 @ 127mph
Tuned by: Promaz Automotive