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"The key to using the multilink is to cut the

Aug. 13, 2017 by Kenneth Newton

"The key to using the multilink is to cut the piston head and crank to the right and to push it down to the top of the crankcase so it can be used with the intercooler to allow for air to escape from the top of the crankshaft. The intercooler is positioned at the front of the crankcase and there's no air pressure and you have to push the crankcase down on the crankshaft to get air out."

That sounds good, but it's not as good as the standard intercooler. The QX50's compression ratio has been improved since its introduction with a turbocharger and a dual-clutch transmission, and the engine's internal combustion system is more efficient and cleaner.

"When I was driving my brother's 2008 BMW i3 up in the desert, we had a turbocharger on the engine. That turbo was the only one we had to use," said Greg Fitt, Infiniti's CEO. "It's a very efficient engine – it's not about the power and it's not about the power. It's about efficiency. We wanted to make sure that we had one that would give us a nice efficiency advantage."

That efficiency advantage may seem small but Infiniti is making the turbocharger possible for a lot of buyers, even if they don't want to replace the already-powerful engine.

Now that the multi-spoke QX50 is on the road at the very least, it's a safe bet that it'll be a good value for the money in the near future. The company could also change the balance of the intercooler and engine so that it can be charged only when needed. The new intercooler could be made to work with the intercooler or the intercooler itself if it's used as a differential, or it could be built with intercooler for the turbo, and then switched on for the turbo.

According to Fitt, Infiniti's system "will be able to operate at lower speeds, and it will be able to operate at the same speeds." However, he added, it's "not for everyone in the mid-eighties."

With six turbos in the QX50 and eight on-board combustion engines, it makes sense to be sure the engine's performance will keep up with the turbocharger's efficiency. A full-sized turbocharger (with an intercooler, in fact) would provide sufficient power