Hmmm? I must have missed something along the way watching Ford struggle with its draconian modular systems.
Here's Gm, silently developing a whole new bunch of motors that are really great! Called the GM High Value Engines , theyre all 60 degree V-6 engines , for a more compact , lighter power plant. All save one are push rod engines with Variable Valve Timing. Here lets list them:
1. 3.5 L (LZ4 ) 224hp,220 ft/lbs 99mmX76mm Bore and stroke (close to the 4X3 ratio of Ford's 5.0)
2. 3.9 L (LZ8) 242hp,242 ft/lbs I think the stroke is a tad longer? anyone know?
The LZ8 will cut out cylinders with low load situations for economy, both are pushrod with the variable valve vtiming
The 3rd V6 in the domestic line up , is a DOHC 3.6 L, an offshoot of a engine not available with domestics, shared with Honda. no this isnt the Honda variant, its a different engine exclusively for caddilacs, etc of the high buck persuasion , making a claimed 275 HP now and the next generation coming Soon! will be direct injected , rather than port injected, with 300 Hp projected...Its designated a LY7.
Interestingly enough, in the LZ8, they are pulling about the same power as the old 3.8 L did with a supercharger! and that sucker in its N/A version powered just about every car in the GM lineup , except Caddillac! Thing is ,all these engines are with a bigger bore than stroke, contrary to fords "long stroke think" , where they start with a 4.6's 3.5" X 3.5" bore and stroke, and go up in stroke... (oops , finally, ford has gotten off the dime, and their new 3.5 liter variant of the dohc duratec, to go with a 3.6" bore and 3.4 inch stroke.... gee a whole tenth difference! anyhow it makes 250 hp with the dohc (plus variable intake timing)
Well , its hard to compare apples to oranges, but those compact pushrod engines of GM are absolutely intrigueing for a swap by a hot rodder, and not so shabbyi n the pontiac G-6 and a few other rides like the Malibu. Oh no, did I say Malibu? Sheesh, maybe I gotta start looking at G-6's and Malibu's now?