OHC vs OHV...
I was reading a magazing that was discussing the new Vette. And a reader had wrote in to the magazine and pretty much began dissing the pushrod engines that Chevy still uses. The reader was saying that the pushrod engine is a dinosaur and blah blah blah. And he basically criticized Chevy for not switching over to an over head cam design like Ford uses in the Mustangs. Now I don't know how you guys feel about these two engine designs, but I see absolutely no advantage to switching over to a DOHC engine.
With the V6s, I can see how the pushrod engine cannot keep up. But with the larger displacement 8 cyl engines, I think the pushrod is king. Regardless of what people think, the DOHC engines do not offer any improvement in MPG. Our 6.2 pushrod engines makes more hp and tq than Ford's 6.2 DOHC engines. The DOHC engine is a large, bulky, and heavy engine compared to our OHV engines and they are more expensive to build and maintain. And they certainly are not a new design. They've been around for a long time. People comment on them being a new style engine and yada yada because they are ill-informed and totally ignorant. From an enthusiast standpoint, a pushrod engine being lighter and capable of larger amounts of displacement despite a significantly smaller physical size. I mean, you can get close to 400 cubic inches with a Chevy small block 350...my 4.6 Mustang GT engine can be bored and stroked to maybe about 301 cubic inches. Yet in a side by side picture, the 4.6 looks like it is twice the size of a 350. Matter of fact, it is larger than some big block engines.
Basically, I hope Chevy sticks with a pushrod design. I feel that perhaps they will one day switch over. But hopefully it won't be anytime soon. I think that Chevy has a lot of tricks up their sleeve to keep ahead of the OHC engines. And so far, it looks like Ford and Dodge are the ones trying to keep up with us. IMO, simple is better. The pushrod engine is easy to upgrade and fix due to it's simplicity. We can add a significant amount of displacement at any point with a stroker kit. We can easily swap out heads or do a cam swap. And nothing beats the lopey idle of a big cam in a OHV engine. I think Chevy makes the best engines on the planet as far as a modder is concerned. I hope they keep with the same old trusted, tried, and true design that has kept them on top. What do you guys think?!
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