In a pure scientific (DOHC v OHV) discussion, when making comparisons of examples with varying degrees of critical variables, there has to be some mollification of differences - especially in something as critical as displacement. Another example is comparing a NASCAR motor to one designed to me emissions and perform equally well in city type stop and go traffic with the AC turned on as it does at WOT.
Quote:
Originally Posted by KILLSHOTS
[FONT="]Unfortunately, I think, it’s “on point” in more ways than one. IMHO, this article is not a good argument for a DOHC platform. First, they had to handicap it by starting with a truck engine for the Coyote, because a truly-comparable Mustang engine is far too expensive to be built vs. the LS3. That’s red flag #1.
|
Irrelevant to architecture analysis (DOHC v OHV)
Quote:
Originally Posted by KILLSHOTS
[FONT="]Then, they acknowledge that the Camaro’s (and Corvette’s) pushrod LS3 produces more power in stock form than the Mustang’s DOHC Coyote in stock form, so they handicap it again by throwing a HP per liter parameter into their testing criteria to save the Coyote’s bacon. Ouch, that’s red flag #2. Does anyone who’s being truly objective really care about HP per liter, as opposed to just the amount of power produced? HP per liter, in a case like this, is nothing more than a BS qualifier...*
|
"Does anyone who’s being truly objective..." really think
displacement is irrelevant??
I agree that you're spot on when considering power/$$ and marketing. I mean after all, about 1/3 of ZR-1 owners admit to never pushing their LT5s beyond Gen-I SBC capabilities. The LT5's characteristics are pretty much moot if limited to 5500 or 6000 rpm.
But, $$ wise, the ZR-1 was X2 the price of the base Corvette when new, and pretty much the same is true today, except for some NCRS garage queens that push that to X3 perhaps. So, for some, and that includes all of us, $$ isn't the deciding factor, but rather determines how long one (like me) has to wait to be able to afford one!
And, one could question my saying so, but the "FBI" has taken home the team trophy for the fastest aggregate of 3 cars at a local Corvette drag race shootout event, 3 out of the last 4 years, plus the first year when we won but didn't register for trophies. [I] I dunno... But, it might be a clue? (And there's no more scoffing from C5 or C6 owners when a "lowly C4"
with a ZR-1 badge on it comes to the line against one of their LSx bretheren...
So, the burning question is, what would be possible if GM did build contemporary DOHC V8? I'm w/ Dom: what does the LSx do with a set of MMR DOHC heads on it?? And, why are so many manufactures moving to the DOHC architecture w/ VVT and DI in spite of the drawbacks??