Vishnu & WORKS Dyno overlay
Originally Posted by IE Evo
BTW That area under the curve conjecture is played out. Explain in a lil more detail why Works is a great tuner because although their peak #s are low their area under the curve is superior and more than makes up for it. I still do not get this phenomenon.
The area under the curve is the actual, total power.
If you take a magic marker and shade/fill-in all of the space/area under the line/curve, this darkened area represents the total power output of the engine.
Drivability is more important to us than shooting for a peak number.
With a given fuel, there is a maximum peak HP number that any competent tuner can reach. (Remember that the closer you get to that maximum, the smaller your margin of safety.)
A broad powerband across all RPMs is more difficult to achieve than chasing a single number for bragging rights.
Originally Posted by EM@WORKS
The area under the curve is the actual, total power.
If you take a magic marker and shade/fill-in all of the space/area under the line/curve, this darkened area represents the total power output of the engine.
Drivability is more important to us than shooting for a peak number.
With a given fuel, there is a maximum peak HP number that any competent tuner can reach. (Remember that the closer you get to that maximum, the smaller your margin of safety.)
A broad powerband across all RPMs is more difficult to achieve than chasing a single number for bragging rights.
If you take a magic marker and shade/fill-in all of the space/area under the line/curve, this darkened area represents the total power output of the engine.
Drivability is more important to us than shooting for a peak number.
With a given fuel, there is a maximum peak HP number that any competent tuner can reach. (Remember that the closer you get to that maximum, the smaller your margin of safety.)
A broad powerband across all RPMs is more difficult to achieve than chasing a single number for bragging rights.
Originally Posted by IE Evo
Can't sell me the Kool-aid with this conjecture.
The acutal work done by the engine is directly related the integral under the curve with respect to the rpm vs. time function.
Peak available power is only available at one point in the rpm band (and thus available for a very small portion of the rpm vs. time function).
Thus, it's the AREA under the curve that matters (unless you have a magic transmission that can keep your engine RPM at the maximum power output for your current situation).
So kiddo, stop calling it kool-aid if you just don't know how it works.
-S ...
(PS. It's 3am ... any errors or omissions are probably due to me being tired ... if anyone wants a more technical discussion on this matter I'll continue later. Peace.)
Last edited by jstockdale; Feb 16, 2005 at 03:31 AM.
Originally Posted by jstockdale
Go take a college level course in both Calculus and Physics.
The acutal work done by the engine is directly related the integral under the curve with respect to the rpm vs. time function.
Peak available power is only available at one point in the rpm band (and thus available for a very small portion of the rpm vs. time function).
Thus, it's the AREA under the curve that matters (unless you have a magic transmission that can keep your engine RPM at the maximum power output for your current situation).
So kiddo, stop calling it kool-aid if you just don't know how it works.
-S ...
(PS. It's 3am ... any errors or omissions are probably due to me being tired ... if anyone wants a more technical discussion on this matter I'll continue later. Peace.)
The acutal work done by the engine is directly related the integral under the curve with respect to the rpm vs. time function.
Peak available power is only available at one point in the rpm band (and thus available for a very small portion of the rpm vs. time function).
Thus, it's the AREA under the curve that matters (unless you have a magic transmission that can keep your engine RPM at the maximum power output for your current situation).
So kiddo, stop calling it kool-aid if you just don't know how it works.
-S ...
(PS. It's 3am ... any errors or omissions are probably due to me being tired ... if anyone wants a more technical discussion on this matter I'll continue later. Peace.)
Originally Posted by vnguyenl
I think my Area under the curve will be much better once I complete the entire turbo-back for my car and get a re-flash for it. (I'm cayamandiver's friend with the vishnu xflash)
Dunno about the 'area under the curve' though. Not sure if Vishnu needs to redo your tuning flash for additional exhaust pieces? I wouldn't think it would be a need (although might help some).
Overall though, the lines themselves are somewhat similar in shape.
Originally Posted by jstockdale
Go take a college level course in both Calculus and Physics.
The acutal work done by the engine is directly related the integral under the curve with respect to the rpm vs. time function.
Peak available power is only available at one point in the rpm band (and thus available for a very small portion of the rpm vs. time function).
Thus, it's the AREA under the curve that matters (unless you have a magic transmission that can keep your engine RPM at the maximum power output for your current situation).
So kiddo, stop calling it kool-aid if you just don't know how it works.
-S ...
(PS. It's 3am ... any errors or omissions are probably due to me being tired ... if anyone wants a more technical discussion on this matter I'll continue later. Peace.)
The acutal work done by the engine is directly related the integral under the curve with respect to the rpm vs. time function.
Peak available power is only available at one point in the rpm band (and thus available for a very small portion of the rpm vs. time function).
Thus, it's the AREA under the curve that matters (unless you have a magic transmission that can keep your engine RPM at the maximum power output for your current situation).
So kiddo, stop calling it kool-aid if you just don't know how it works.
-S ...
(PS. It's 3am ... any errors or omissions are probably due to me being tired ... if anyone wants a more technical discussion on this matter I'll continue later. Peace.)
Last edited by IE Evo; Feb 16, 2005 at 02:17 PM.
Ok, lets make things even more interesting. Here is the same dyno chart with my P2, turbo back and throttle body overlaid with my friends Vishnu flash, catback, intake and 21psi. I added my WORKS P1 graph (ORANGE) to this for a visual. The WORKS P1 flash is nearly identical in HP to the vishnu flash, except the vishnu peaks higher. As far as torque, the Vishnu and cat back give a noticeable difference compared to the stock car with just P1.
Again i'm not here saying one tuner is better than another. I'm only showing people what mods give you what kind of power through various parts and flashes.
Again i'm not here saying one tuner is better than another. I'm only showing people what mods give you what kind of power through various parts and flashes.
Last edited by caymandiver75; Feb 16, 2005 at 01:15 PM.
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Originally Posted by upstateEVO
Ask any racer why this is important. The area under the curve is where you drive the car most of the time. Who cares if you make 20 more horsepower from 6800-7000 rpms?
Originally Posted by robertrinaustin
I think you've got this reversed. A large area under the curve makes a car more pleasurable to drive on a day-to-day basis. Racecar engines however, tend to have very peaky power bands, at least technically sophisticated engines. Cars such as in Formula 1 operate in a more narrow rpm range, especially considering the size of entire rpm range. Power down low doesn’t mean much to the Ferrari team.
Who cares?
When you can go to a road course and get your *** whipped by a great driver in a spec miata, it means little. My goal is to become such a good driver that I can fully exploit the measly 330 (crank) hp "kool-aid" kart that I have. Can you wring all the power out of your car in an effective manner on the track? All this conjecture means little to me otherwise. I stay with works because it strikes ME as safe, reliable, torqy and effective for where I am now. If my skills catch up to say, the level of someone like Robi, etc, I might look at other alternatives. For now, I'll take mine grape with lots of sugar. Amen.
Percy
When you can go to a road course and get your *** whipped by a great driver in a spec miata, it means little. My goal is to become such a good driver that I can fully exploit the measly 330 (crank) hp "kool-aid" kart that I have. Can you wring all the power out of your car in an effective manner on the track? All this conjecture means little to me otherwise. I stay with works because it strikes ME as safe, reliable, torqy and effective for where I am now. If my skills catch up to say, the level of someone like Robi, etc, I might look at other alternatives. For now, I'll take mine grape with lots of sugar. Amen.
Percy



