Evo X Technical Report From Tomei
April 6, 2008 by Leon
Those crafty little technical wonderboys over at Tomei’s engineering division have been hard at work since they first got hands on Mitsubishi’s new 4B11 powerplant that is the beating heart of the brand-spanking Evo X. In order to gain as much information about the engine as they possible could in order to make manufacturing their own power-milking parts for the engine, they’ve spent months completely reverse-engineering it and have released a report detaling their findings.
It seems Mitsubishi have really tried to keep both the environment as well as the power-hungry boy-racer in mind when building this engine as many features are designed to capitalise on saving dear-old Mother Earth, as well as wringing out every available iota of performance.
MIVEC is now available on both intake and exhaust valve timing now, whereas the predecessor 4G63 could only utilise this feature on the intake cycle of the engine, which is designed to improve low and midrange torque, while remaining as environmentally sound as it can possibly be.
Among other changes, the camshaft rocker arms have been taken out of the equation completely to offer increased reliability and reduced wear as a result of fewer moving parts, the valves, lifters and valve springs have all been lightened considerably and the timing belt has been replaced with a silent chain.
All-in-all, Misubishi have made a whole host of changes to its new high-performance powerplant, and you can read about them all by clicking here. Still, I want to get me an Evo VII. I heart them more.
- Leon.
“Those crafty little technical gnomes over at Tomei’s engineering division”
Is this “Australian ex-patriot living in Malaysia”’s way to describe Japanese engineers?
Settle down there tiger, it wasn’t a racial slur - it’s called creative writing. Notice how I said nothing in reference to them being Japanese? And you really think I’d write a JDM-dedicated blog if I were in any way racist towards the Japanese? And just for your bleeding heart, I’ve changed it - hope that doesn’t offend you either. Please, for the sake of all of us, lighten up.