Peugeot 106 GTi Turbo GT2871R
Testing the limits of the stock engine internals is not for the faint of heart but without guts no glory! Running in original form with only 118 hp it is hard to believe the little 1.6 liter engine can withstand 400+ hp on the original pistons and connecting rods. Bas, owner of the car, was kind enough to allowed us to test his nerves :) and the integrity of a nearly stock TU5J4 engine on elevated boost levels with E85 fuel. Since Bas has a 'spirited' driving style and an appetite for track days, he is the perfect candidate for endurance testing the 413 hp TU engine... Now a year, a couple of track days and a few broken gearboxes later the engine is still going strong. It makes you wonder... could the TU5J4 hold 450+ hp on stock internals... What do you think Bas?
The only modifications to the engine itself are a decompression package to lower the compression ratio and an ARP head stud kit to improve the head-to-block sealing. For the increase in power output is responsible a Garrett GT2871R turbocharger mounted on our stainless 'Blister' turbo exhaust manifold in combination with a 38mm TiAL external wastegate. The DP aluminium performance intake manifold raises the efficiency and pressure resistance on the intake side of the engine. Critical for any engine, especially a highly tuned one, is reliable and accurate management of fuel and spark. We have used a Vems PnP programmable management system to tackle this job, controlling the 875cc Siemens injectors and MSD upgrade ignition system. The exhaust system is a custom stainless 3" fabrication ending with a 2.5" silencer.
Unfortunately the stock MA gearbox of the 106 GTi is not the strongest one in the world... Bas has experienced that in real life... When number two popped the gearbox was upgraded to a BE4 box with the help of an Atspeed BE gearbox conversion kit and competition driveshafts. Since the BE gearbox upgrade the only thing that breaks are the egos of unsuspecting Porsche drivers and fellow track day racers...