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02-26-2017, 12:46 PM | #51 | |
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Re: Why all the hype about horse power and torque?
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Practically speaking, knowing both the peak power and the peak torque and the respective RPMs at which they occur gives us a good bit of insight into how much average power the engine makes across a range of engine speeds. This sometimes results in some real confusion over what the word "torque" really means. If we could have an infinitely variable CVT, we could always accelerate a load fastest by using the engine with the highest peak horsepower we could find and running that engine at that RPM. Engine torque would quite literally be irrelevant. Since we can't do that in practice, we manipulate gearing the best we can to suit the output characteristics of the engine we have, and it is very helpful to have an engine that produces a broad power curve which, when we rate the engine for peak power and torque, will show good low RPM torque numbers and good high RPM power numbers. |
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02-26-2017, 01:50 PM | #52 | |
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Location: Redmond, WA
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Re: Why all the hype about horse power and torque?
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I've always wondered why, with CVTs, they don't let you flash to and hold at peak hp while the gear ratio changes as the vehicle speeds up....
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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02-26-2017, 02:13 PM | #53 |
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Join Date: Feb 2016
Location: Portland Oregon
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Re: Why all the hype about horse power and torque?
Formula 1 has experimented with CVT's but the fuel consumption is tremendous and really only useful for qualifications. The OE's are experimenting with the intent of maximizing fuel economy and lower emissions. Which is most likely the opposite of what you were hoping for. Reliability is why your seeing 6,7,8,9,&10 speed transmissions as they are currently more reliable than a true CVT.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
02-26-2017, 03:21 PM | #54 |
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Join Date: May 2003
Location: Jefferson State
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Re: Why all the hype about horse power and torque?
I *think* that's been done, and it's one reason for CVT's image problem. The dreaded motorboat effect. People like to hear RPMs rise with increasing speed VS a constant steady drone as the speed increases.
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02-26-2017, 03:34 PM | #55 |
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Join Date: Jan 2001
Location: Orem, Utah
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Re: Why all the hype about horse power and torque?
My wife has a Highlander Hybrid. When you're accelerating hard the engine runs up to speed and stays there while the CVT does its thing. It sounds like a sewing machine on crack cocaine.
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02-27-2017, 03:26 PM | #56 | |
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Re: Why all the hype about horse power and torque?
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02-28-2017, 10:41 AM | #57 |
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Join Date: Feb 2004
Location: Williamsburg, Ohio
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Re: Why all the hype about horse power and torque?
My reasoning --- If it has a spread bore manifold, put a correct quadrajet on it. The timing, choke, and idle can usually be adjusted for a reasonable street setup. I run a quadrajet on my 70 442 -electric choke- and my 67 K10 bbc -divorced choke. No they are not daily drivers but I want them to act right when I start, drive, and stop. I do not find quadrajets hard to rebuild.
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1942 Chevy 1/2 ton Rod, 1959 GMC 1/2 ton Fleet Stepside, 1967 Chevy SWB K10, 1985 Corvette Coupe 4+3, 2015 Chevy Duramax reg cab 4WD W/T |
02-28-2017, 01:27 PM | #58 | |
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Location: Scottsdale, AZ
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Re: Why all the hype about horse power and torque?
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Boy did he get the ribbing at the track pulling that pig like a lawnmower to start it. Yes, he would show up at the track at Indian Dunes with that thing. I always think of that Rokon when I hear CVT! Funny
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02-28-2017, 01:32 PM | #59 | ||
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Location: Redmond, WA
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Re: Why all the hype about horse power and torque?
Quote:
Quote:
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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