The sequential shifter controls the Emco transaxle. Capable of withstanding big power, rev limiter launches and “bang-bang” no-lift shifts, lots of engineering (and money) went into making sure transaxle problems would not plague the team on raceday. Gear ratios are relatively narrow, with only a 2.0:1 gear spread (3.00:1 first, direct drive 6th). The gearbox was also a challenge in that it had to coexist transverse-mounted with the longish 5-cylinder engine, transfer case, and incorporate the front diff.
Under the hood, K-PAX liberally massaged the 2.5L Volvo 5 cylinder to make the big power necessary to keep up with other cars in the series. Huffing 26psi of boost (with a 600ms “scramble” overboost allowed) out of a Garret-based TiAL GT3586R, power is sudden and violent. Unfortunately, the rules-mandated turbo setup requires some planning ahead for the drivers, as lag is noticeable.
The properly ducted V-mounted PWR intercooler, sized 610mm x 267mm x 115mm, feeds the K-PAX fabricated intake manifold with 70mm throttle body. The V-mounted radiator, being as low as it is, requires a little trickery to ensure that air bubbles are properly bled.
To help compensate, this beautifully fabricated swirl tank ensures bubbles are constantly removed from the cooling system. The top lines feed an overflow tank on the other side of the car.