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Old 07-28-2007, 04:04 PM   #11
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Quote:
Originally Posted by theJMFC
Personally, I'm really glad that GM is still pushing the old OHC design to it'* limits, and going faster than cars that cost twice as much in the process.
that is the prolblem.... OHV engines are already pushed to the limits, or damn close the the limits....

compare this:
08 impala, 3.9L OHV
233 hp (179 kW) and 240 ft·lbf (332 Nm) torque

08 Infiniti G37
330 hp, 270 tq

SMALLER ENGINE

MORE POWER AND TORQUE\

And trust me, I KNOW.... Nissan VQ motors are very flat and torquey all the way across the powerband

honestly, i think your all being stubborn and are having trouble admitting that GMs engineers are handicapped and not smart enough to make more than one cool car (corvette) the rest are mediocre and cant compare to new imports
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Old 07-28-2007, 04:18 PM   #12
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Quote:
Originally Posted by toastedoats
Quote:
Originally Posted by theJMFC
Personally, I'm really glad that GM is still pushing the old OHC design to it'* limits, and going faster than cars that cost twice as much in the process.
that is the prolblem.... OHV engines are already pushed to the limits, or damn close the the limits....

compare this:
08 impala, 3.9L OHV
233 hp (179 kW) and 240 ft·lbf (332 Nm) torque

08 Infiniti G37
330 hp, 270 tq

SMALLER ENGINE

MORE POWER AND TORQUE\

And trust me, I KNOW.... Nissan VQ motors are very flat and torquey all the way across the powerband

honestly, i think your all being stubborn and are having trouble admitting that GMs engineers are handicapped and not smart enough to make more than one cool car (corvette) the rest are mediocre and cant compare to new imports
Amen Brother
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Old 07-28-2007, 04:23 PM   #13
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Well toasted, thats what I was wondering about. Mitsubishi 3.5 makes pretty much the same numbers as a L36. Smaller engine with the same output! I was just curious on how much more power a L36 could get Maybe equal out put to a L67 without all the heat? The thing I hate most about superchargers..... the constant whining. got a wife for that!
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Old 07-28-2007, 04:30 PM   #14
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Quote:
Originally Posted by roadtech195
Well toasted, thats what I was wondering about. Mitsubishi 3.5 makes pretty much the same numbers as a L36. Smaller engine with the same output! I was just curious on how much more power a L36 could get Maybe equal out put to a L67 without all the heat? The thing I hate most about superchargers..... the constant whining. got a wife for that!
Yeah its so funny people here want and do things to thier cars to hear more whine as I like to hear my F150s supercharger whine as well. With high end cars like the S55 and Alpina B7 its about silence as you dont even hear any whine. They actually work hard to keep whine to a minimum on high end cars.
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Old 07-28-2007, 05:34 PM   #15
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OHV does have great packaging. OHV is good in american engines, because cars aren't taxed on displacement in this country. In many european countries, your car taxes are based on engine displacement, not actual effeciency figures, for example...

Corvette Z06
LS7, 7.0L V8 (OHV)
505HP, we'll say 27MPG Highway for it in the C6
One of the highest BFSC in the industry (essentially how effeciently it turns gas into HP. the LSx series is pretty much the best all time road engine at this)

BMW 5.0L V10 (OHC)
501HP, about 22MPH highway.

The bimmer will be taxed less in england. OHC has conventionally been easier to do variable timing on it, but GM has made a great OHV variable timing design they've encorporated into their Gen IV V8. DOD is also used, but that'* more fuel/spark cut.

Both can be good, it'* just how everything is tied together, and designed to work well.
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Old 07-28-2007, 06:04 PM   #16
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Quote:
Originally Posted by toastedoats
compare this:
08 impala, 3.9L OHV
233 hp (179 kW) and 240 ft·lbf (332 Nm) torque

08 Infiniti G37
330 hp, 270 tq

SMALLER ENGINE

MORE POWER AND TORQUE\
Are you seriously comparing an Impala to a G37?

I'll admit, GM isn't on the tip of the most advanced technology but IMO they make pretty decent engines for the cars they go into.
Cam in block technology can be taken pretty far. I mean, look at the new viper cams.
It'* all about cost to manufacture, packaging, and designing and engine that will do what it shoud for the car it goes into. (towing, passengers, speed, economy, etc.)

And don't think I'm some GM ***** or something. I'm a huge fan of the VQ'*. I've worked on, and had apart, both the 30 and 35. HeII, I probaby know the 30 and 35 as good as I do the L36. And Nissan is definitely on the come up lately aswell. I just can't stand seeing someone compare a sports car engine to a run of the mill GM passenger car'*.
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Old 07-28-2007, 07:31 PM   #17
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i understand the "unfair comaparison" so lets compare the 3.5 in the altima that makes 275hp, 260tq........ vs the malibu OHV 3.5l, that is 217hp 217tq, or the 3.9 discussed above
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Old 07-28-2007, 08:02 PM   #18
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Quote:
Originally Posted by toastedoats
i understand the "unfair comaparison" so lets compare the 3.5 in the altima that makes 275hp, 260tq........ vs the malibu OHV 3.5l, that is 217hp 217tq, or the 3.9 discussed above
Lets keep in mind that the Altima creates that peak torque almost 2000 rpm higher than the GM. Obviously different priorities when they were designed.
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Old 07-28-2007, 08:11 PM   #19
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Lets look at pricing too. A 3.5 Malibu *LISTS* at 20,795. Doubt anyone has paid that for it.

THe Altima? $25,125.

Costing 25% more than the Malibu, with the out the door difference probably being bigger, I am not surprised that the Altima has more engine.
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Old 07-28-2007, 08:14 PM   #20
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this is not a discussion about VEHICLES, it is about engines and technology, OHV vs OHC

i also gave you the option to compare the 3.9 impala if you chose to do so instead of the malibu.... I am using examples of displacement/Cam placement/hp/tq to compare, ignoring WHAT VEHICLE THEY CAME IN.....
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