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#101
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Newton was clueless!
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#102
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#103
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Life is hard, it's even harder if your stupid- John Wayne Last edited by Daniel Barton; 02-03-2015 at 08:19 AM. |
#104
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Stan, some were but not all.
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Life is hard, it's even harder if your stupid- John Wayne |
#105
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In other words - Acceleration is a measure of the time it takes to go from one velocity to another velocity. The RATE of change (acceleration) of velocity is measured by measuring the time it takes to change from 0 MPH to 140 MPH. The acceleration is greater if the time is less. A 0-140 MPH change in the elapsed time of 10 seconds has a greater rate of change of velocity (acceleration) than an elapsed time of 11.28 seconds to do the same change from 0-140 MPH. It gets a little tricky because the greater the rate of change, the greater the velocity in the same distance, and the less time it takes to travel that same distance, hence my equations, which are 100% accurate! Last edited by Motor Daddy; 02-03-2015 at 08:32 AM. |
#106
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Just to side track from the healthy discussion here, Been thinking about this for a bit and always go back and forth on bob weight vs acceleration. Dumb question but If I put the car in neutral will the engine accelerate faster than if it is in gear? So based on that result, is the heavier rotating mass the acceleration limiter, or is it the rest of the rotating assembly - Converter, Transmission, Driveshaft, Rear End, Wheels, and Vehicle weight doing more limiting that a heavy set of rods and crank. I just bought a set of Carr pro stock rods from Book and they have been ranging in the 600-620 gram max window... doesn't seem to have hurt their acceleration vs a mid upper 400 gram aluminum rod. Not debating, as I don't feel like I have a consensus on it, just thinking out loud in discussion. |
#107
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I'm sure what Dan is talking about is engine acceleration not vehicle acceleration like you guys are talking about. Two totally different things.
And engine has a power curve and the faster the engine accelerates the faster it gets through that curve getting into the higher horsepower levels of the curve sooner. Same thing I want of the lifter on my camshaft. Dan, yes if two motors have the identical power curve but one motor accelerates faster against the same load than that motor will absolutely be faster in the car. But imo you can't produce those two motors with identical power curves!!!! Hp is work vs time. If work is the same but time is lesser ,,,,,,then hp is greater.
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John Marcella Marcella Manifolds Inc. john@marcellamanifolds.net ph. 248-259-6696 |
#108
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So we have transmissions that improve ET and make zero difference in mile-per-hour. And cars that affect ET and mile-per-hour with the same drivetrain. Yet it is better to "judge" hp from mph? Quote:
Just trying to learn from the pros. We all evaluate combinations and their effectiveness whether it's against a dyno sheet versus ET or other Car/combo. Of course us "novices" Are incapable of properly judging horsepower. We are only smart enough to "trick" a dyno and build unicorn engines that are anomalies. That might be a good business venture for you and John L....www.horsepowerjudges.com Submit a combo and wait for the "judge" to explain what's wrong with an engine based on a professional opinion. Not sure how that would go for the guy not building his own engine combos though. Just a thought.
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EHTTFMF! Being dead, it is not hard on you. You don't even know you're dead. It is hard on everyone else that is not dead. BEING STUPID WORKS THE SAME WAY! The rest of us suffer. Last edited by mike leech; 02-03-2015 at 08:59 AM. |
#109
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That is: Virtually, a load was placed on the engine at every RPM until the RPM did NOT change, ie, the maximum TORQUE for that RPM was measured, and the RPM was not changing. It was "loaded to the max" at that RPM at that torque reading. HORSEPOWER is a unit of measure of power, which is work divided by time, ie, (force*distance)/time. 550 ft-lb of WORK per SECOND (33,000 ft-lb of work per minute (33,000/6.28 ft-lb=5252 (1 lb-ft of torque at 5252 RPM equals 1 HP))), so HP=Torque*RPM/5252. If you are doing work at the rate of 33,000 ft-lb per minute, at an RPM of 5252, the torque is 1 lb-ft. It is simply all a measure of mass, distance, and time. It is how we MEASURE. Last edited by Motor Daddy; 02-03-2015 at 09:01 AM. |
#110
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Life is hard, it's even harder if your stupid- John Wayne |
#111
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I've had numerous torque converters, 2 different manuf. both the same size, similar stall speeds, one is 2 tenths faster than the other, and some mph.
We've all seen many swings in results in et and mph with no engine changes so any debate in it is invalid. |
#112
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I have a magic box in my car that measures rate of acceleration in g-force vs time. You can look at that data and determine the rate of acceleration at different points on the track.
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#113
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Life is hard, it's even harder if your stupid- John Wayne |
#114
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#115
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Weights were different. CD was different. No contradiction. More aero car went faster with same exact drive train. I believe that was the purpose of the comparison. I could go into more detail but I dont really care.
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#116
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#117
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okay I'm off to work, whats a circus without the clowns?
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Life is hard, it's even harder if your stupid- John Wayne |
#118
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Ditto here. Lol.
Got a love a full moon
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EHTTFMF! Being dead, it is not hard on you. You don't even know you're dead. It is hard on everyone else that is not dead. BEING STUPID WORKS THE SAME WAY! The rest of us suffer. |
#119
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You need more POWER to make your car run less time in the 1/4. More power means more work in the same time, or the same work in less time. See how the gear changes the time in the pic?? The RPM is the black line. The gear changes are shown as different angles, and time is along the bottom. Notice how time is absolute? Last edited by Motor Daddy; 02-03-2015 at 09:47 AM. |
#120
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1963 Cat SD Clone (old school) streeter 1964 GTO post coupe, tripower, 4speed (build) 1965 GTO 389 tripower, 4 speed, driver 1966 GTO dragcar 1966 GTO Ragtop 1969 Tempest ET clone street/strip 1969 GTO Judge RA lll, auto 1969 GTO limelight Conv. 4speed go and show (sold) 1970 GP SSJ 1970 GTO barn find..TLB…390 horse?….yeh, 390 1972 GTO 455 HO, 4 speed, (build) 1973 Grand Safari wagon, 700hp stoplight sleeper 525ci DCI & 609ci LM V head builds |
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