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The push rod is more simple, smaller, cheeper and lighter - judge the LS series by it's specifications and durability rather than pre-concieved notions of OHC superiority - it comes out the winner.
Just wandering why you guys think chevy hasnt put an overhead cam in the vette by now?? I would have thought they would have to bring the vette into the next generation of sports cars
Push rod engines are naturally stouter engines because of its simplistic design. Compared with same displacement OHV engine, a pushrod engine will have a lower physical profile ........ overhead means overhead. All the extra stuff of an OHV is sitting on top of the heads. It has more parts than your standard pushrods ..... extra camshaft, extra gears to drive the extra cam, extra lifters, etc. That equates to more mass and more friction to overcome. That's why pushrods produce more low end torque than OHVs. Some people likes the high rpm shrill of OHV engines but to me that just means more wear on the engine. More moving parts does not mean high tech.
Just wandering why you guys think chevy hasnt put an overhead cam in the vette by now?? I would have thought they would have to bring the vette into the next generation of sports cars
Great article- i must admit before i had this car i was bit of a technology snob generally percieving the push rod engine as ineffeiciant and archaic, seeing as I owned and m3 and an acura. However, that article was very enlinghtening and interesting. I will be the first one to admit how wrong I was. Thanks for all the info guys. There really are very knowledgable and informative people on this forum.
In addition to what everyone else has said it really comes down to intended RPM usage range. Push Rods can easily control value events up to about 7K rpms and can be built for 10k though at this point you have 1/2 push rods. But once you are running 7K or better regularly OHC is probably the better choice.
Even though I think it would be cool to drive a vehicle that turns 10k average I'll stick with 1800 cruising down the freeway.
From: Austin, Texas Codes 660, 9448, and 295660 work in the C6 navigation unit. No DVD playback yet.
Originally Posted by rfopt
At an auto show I saw a 5.7 L LS1 pushrod engine on display in the Chevy section and I saw a Nissan 3.5L OHC V6 engine on display in the Nissan section. I was shocked that they looked similar in overall size.
The LS1/LS2 engines are amazingly compact. So compact, in fact, that they will fit inside a Mazda Miata with little modification.
There is also someone that put an LS1 in an older white 911. The car actually raised about an inch because the LS1 was lighter than the old 6 from the porsche.