Spec B Wgn wrote:THE ENGINE
There are many things about this engine that are very cool. Just looking at the specs doesn't do it justice. 3.0L, 6 cylinders, DOHC, AVCS, AVLS, 250HP in stock form, aluminum block, forged steel crank, chain driven cams, and only .700" longer than an EJ20! Did I mention 3 point zero liters! Being familiar with the 4 bangers, the first thing that I was interested in seeing was how the Variable lift worked. The cams are the first strange thing you see as each valve has 3 lobes. One central lobe for the low lift and 2 outer ones for high lift, longer duration. The bucket is where the magic happens. There is an inner and outer piston that rubs on both cam lobes all time. When the solenoid allows oil pressure to shoot through the oil gallery, it locks the inner piston to the outer piston/bucket, and bam, new cam profile. I have to say this is probably the coolest part of the engine. Word is this is a co-developed technology from Porsche and Subaru, sure enough the parts are made in Germany.
Yeah that freaky valve gearing, its pure genius. Some Aussie combie mechanic thought of it too but when he went to the cpoyright office, turned out, Porsche had thought of it first.
As for the write up - its pretty thorough and needless to say I've studied it more than a few times before I embarked on the double whammy version myself.
I've seen the insides of a H6 on a shortblock and the stock conrods in the H6 are less stockier than any H4 because there are two more of them in the H6 so each individual conrod handles almost
10% less power than those in the H4. But, of course with HPTurbocharging they probably won't handle anything past 8-10psi.
The block itself has a surprising amount of robustness over-engineered into it.
Will post some photos and write-up of our build on here one day.