 Complete the following phrase:  In 1993 after four years in Formula One with only one significant result for the engine, Bob Lutz of Lamborghinis parent company Chrysler, did a hand-shake deal with McLaren boss Ron Dennis for the team to test the LE3512 to evaluate its potential as a race winner. McLaren made a modified version of their race car, the a hrefMcLaren20MP48McLaren MP48a dubbed the MP48B, to test the engine the test car took three months to modify to fit the longer and heavier V12. Testing was completed by triple World Champion Ayrton Senna, and future dual World Champion Mika Häkkinen at both the Silverstone Circuit in England and the Estoril circuit in Portugal. After his first drive of the car at Silverstone, Senna suggested certain changes to Forghieri a less brutal top end and a fatter mid-range, and he complied with engine power increased from to approximately and both drivers were very impressed despite the engine still being somewhat unreliable Häkkinen reported a massive engine blow up while testing at Silverstone, though he did manage to lap the 5.226 km 3.260 mi circuit some 1.4 seconds faster than the teams MP48 race car powered by a Ford V8 engine. According to reports, Senna even wanted to race the engine at the Japanese Grand Prix believing that while reliability might be a problem, at least he would be quicker than with the Ford powered race car ironically Senna would win in both Japan and the last race in 