A "square" motor is not he best fo FI, over quare is. Big bore short stroke makes a high reving engine, high reving engines need alot of air flow at the high RPM's, a turbo's air flow increases as RPM's go up, feeding the over square engines need for air flow. Hince the 2.0 ECOTEC being a destroked 2.2L, it has the same bore.
Look at the air cooled VW's. The simi-Halo turbo engine is a 1916cc, 94mm bore w/a 69mm stroke. With this arangment you get the absolute most bang for displacement in a turbo application. But it is not so true in a S/C application because of a superchargers linier power output.
The ultimate ECOTEC would be to use the 2.4L block with the new 2.0L Turbo crank and rods with a low comp piston and the new 2.0L with direct injection head, with the port/valve seat/combustion chamber redesigned for the larger bore(this can be done at any reputble head shop). Deshroud the hell out of the valves, because, the bigger the combustion chamber the lower the compression. In theory this should work given if the parts are interchangable the way most chevys stuff is, I.E. LS 1, 2, and 6 heads with their perspective blocks.

 

Interesting..........

 

I agree with what you are saying with the Ecotecs, but you are a little bit off on the air-cooled VWs. I get way more torque out of my N/A 2275cc (94mm Pistons and 82mm Stroke) than I ever did out of my 1914cc (94mm Pistons and 69mm Stroke).

 

Probably why they are gonna trbo the 08s, just look at the gains for the hahnracecraft 2.4

 

If they turbo the 08s, they'll use the 2.0L block... the same 2.0L Ecotec that's turbocharged in the Solstice GXP and Sky RL.

 

THats what I meant

 

Very interesting...

 

Yep its pretty much one of those "duh" things. Chevy isnt going to go do extra work to make 2 turbo 4-bangers.... that dips into their profits.

 

I know it's one of those "duh" things. I was pointing it out because g5mike kinda hinted at the 2.4L Ecotec turboed by Hahn. That turboed ecotec really has nothing to do with GM coming out with a turboed 2.0L.

 

True on torque, more stroke does get more touque, but less RPM's. Thats the never ending battle: more torque or more horsepower. But you don't need a torquey motor if you add boost, the FI will compensate. Kind of like the compression thing, High compression = high power from the motor, reduce compression you loose power from the motor, but it alows for more boost, which nets more power in the end. more is not allways better.

 

That is very true, and my knowledge of VW motors are built for Off-road, not top speed. I would rather have a large displacement motor with a small turbo for my Buggy. That is why I am looking into the Ecotec 2.4 with a Hahn turbo for my next buggy motor. Once I get to the point of putting one in the buggy I will do a write-up on the build. You guys would be suprised how many people are putting Ecotecs into buggies.