the Official "NA Tuning" thread
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From: The Woodlands, Tx
^^^It sometimes helps if you can acctually see the numbers. 
Also I know that is a must to have an EMS with ITBs, but why? I mean all you are doing is getting more air so all you can change with an EMS is the curve, Vtec point, and some other stuff. Wouldn't it be easier and cheaper to just get a VAFC or even better E-mang Ult? I am just trying to figure out the reasoning behind this.
Also I know that is a must to have an EMS with ITBs, but why? I mean all you are doing is getting more air so all you can change with an EMS is the curve, Vtec point, and some other stuff. Wouldn't it be easier and cheaper to just get a VAFC or even better E-mang Ult? I am just trying to figure out the reasoning behind this.
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Wildcard, for the record torque is not a calculation derived from horsepower. Horsepower is a calculation derived from torque. Torque is the actual power output of your motor while horsepower is the theoretical amount of work such torque at a given rpm can do. As you already know, the equation for deriving horsepower from torque is as follows: torque x rpm/5,252. This is NOT the equation used to derive torque from horsepower. I believe that in a previous post you applied this equation to your dyno runs which is not accurate. The equation to convert horsepower into torque is as follows: horsepower x 5,252/rpm.
Bottom line, a dyno does not measure horsepower it measures torque and then applies the above equation to find horsepower.
Bottom line, a dyno does not measure horsepower it measures torque and then applies the above equation to find horsepower.
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From: formerly versionJDM
vafc tunes off the TPS, and with ITBs you wont have one, so that eliminates vafc right off the bat. plus vafc isnt sharpe enough to tune itbs, you need to tune the hell outta them to get them to run right. i believe that emanage tunes in somewhat the same way, suing the TPS, but im not totally sure of the validity of that.
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From: UCF Knights!
Originally Posted by H-twnBerlina,Nov 28 2006, 05:42 PM
^^^It sometimes helps if you can acctually see the numbers.
Also I know that is a must to have an EMS with ITBs, but why? I mean all you are doing is getting more air so all you can change with an EMS is the curve, Vtec point, and some other stuff. Wouldn't it be easier and cheaper to just get a VAFC or even better E-mang Ult? I am just trying to figure out the reasoning behind this.
Also I know that is a must to have an EMS with ITBs, but why? I mean all you are doing is getting more air so all you can change with an EMS is the curve, Vtec point, and some other stuff. Wouldn't it be easier and cheaper to just get a VAFC or even better E-mang Ult? I am just trying to figure out the reasoning behind this.
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From: formerly versionJDM
Originally Posted by wildcardtrd,Nov 28 2006, 02:54 PM
Incorrect sir. The dyno measures horsepower, then calculates torque. Look at my dyno sheet. See something missing? The torque curve is not present. The torque curve is not there due to the fact that the rpm pickup on the dyno was inoperable. If what you say is true, I'd have a torque plot, but no horsepower plot.
Horsepower and torque can both be derived from a calculation of the other, since they are related. Horsepower itself can be measured directly from a dynometer, since 1 horsepower is exactly 745.7 watts or 33,000 foot-pounds per minute.
The latter explains why torque can be calculated from the horsepower curve.
Watts are easy to measure. That is why dyno's read horsepower, then calculate torque.
Horsepower and torque can both be derived from a calculation of the other, since they are related. Horsepower itself can be measured directly from a dynometer, since 1 horsepower is exactly 745.7 watts or 33,000 foot-pounds per minute.
The latter explains why torque can be calculated from the horsepower curve.
Watts are easy to measure. That is why dyno's read horsepower, then calculate torque.
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From: UCF Knights!
Originally Posted by BlownAP,Nov 28 2006, 07:27 PM
give me your torque and RPM and ill tell you your HP 
Horsepower = Torque * RPM / 5252
Horsepower = Torque * RPM / 5252