Why do some cars have way more torque than others?
#1
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Why do some cars have way more torque than others?
I some times see cars with comparable mods and while the HP and overall power fluctuates due to temp, dyno, smoothing factors etc there still seems to be some car with 100ft lbs over their HP where as mine has 10 ft lbs more torque than HP. My car has similar mods to eurocharged stage 2 substitute long tubes for short tubes and a mid pipe w/resonator and cat delete with X pipe. EC shows 600hp and 670ft lbs. Minus 15% this is about 510hp and 570 at the tire. Or if you subscribe to autos zapping 20% roughly 480hp and 536ft lbs. On the rollers my car made 461hp and 471ft lbs. it's just curious to me how some cars seem to make all the same HP as the rest of us yet some of you guys get ridonkulous torque numbers. Is it all in the tune or is it luck or how do I get another 60 ft lbs? Lol
#2
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Post up your dyno sheet and full mod list. Could be as simple as the dyno not being started at a low enough rpm.
#6
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Great question. Dyno numbers depend on so many factors. Ambient temp is one and what about your IAT temp? Barometric pressure and engine knock retard are others. Did you cool down the car before dyno run? Your numbers seem a bit soft for your current mods.
#7
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Yeah who knows. Previous owner took it but I feel it's safe to assume they did their diligence. I'm just curious cause I'm noticing quite a few that have a large differential between torque and HP. It's interesting to see how much they vary.
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#9
#10
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I would set up a time with Jerry to do a custom dyno tune. You may be leaving a lot on the table with the box tune.
#11
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2011 CTSV auto, 06 E55 white pano, 87 Grand national, 63 split window
Dyno, dyno, dyno...different temps, dif dynos, whatever...who cares? How does the car run...that's what matters! Good luck with it either way but just run someone with more or similar mods...even a guy with less mods...just see how it compares to others actually running!
#13
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Get a custom tune and you should see an improvement.
#15
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Look at the power difference between the afr between those to runs. One is two rich and one is to lean. Why is there such a difference in the AFR in those runs?
Last edited by austingtir; 08-17-2013 at 08:55 PM.
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99 ford lightning
on my dynojet for what ever reason my vehicles always showed a lower torque then others but as long as the curve is good thats what matters also my cars usually ran quicker compared to ones that just showed a high number.
#19
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The difference among cars is all the variables. Mods, Dyno, weather, tune, dyno operators feeling that day.
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2011 CTSV auto, 06 E55 white pano, 87 Grand national, 63 split window
I kinda said this already but all of this said here can be a huge difference.
Last edited by 60nomad; 08-18-2013 at 10:07 AM.
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#23
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I was under the assumption that a wideband and logger minimum was needed to successfully accomplish this. I don't have a wideband.
#24
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Call EC and they will explain...
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C215 CL55 AMG, W124 500E, W210 E430, W124 300E
Also how does he do this with the fuel trim values? Before he can use the data you need to reset the ECU, right???