new theory - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

tnord · 01-01-2002, 11:45 PM

Man, you don't check the boards for a couple days and look what you miss out on.  Anyway, i have a new (at least new to me) theory on judging on whether a particular modification will actually make it faster.  If you took 2 dyno charts, one before and one after the modification, and using calculus, found the area under the curve (hp,torque, or a combination of both, i don't really know), for each chart and compared them, the one with the most area would be the faster car wouldn't it?  This method would take into consideration losses in low end in exchange for gains in high end.  Of course you can consider RPM ranges as well.  Like when racing you never really dip down below 4750, so you could just find area from there to 6250 to find which car will be faster on the track.  Just something i'd been thinking about lately.

kitoro · 01-02-2002, 12:58 AM

it's "simple" math.
i already learnt that after i was reminded that a dyno chart should be compared to a normal distribution graph.
at least you figured it out urself.
i dun think i would've figured it out very quickly if i did it myself.

*Grant* · 01-02-2002, 05:13 AM

f**k calculus. lol.. It's all abotu statistics (well i nearly failed pre-calculus so.. haha..), but yea, i think that's the usual method.

(Edited by Grant at 4:21 am on Jan. 2, 2002)

01-01-2002, 11:45 PM	#1
tnord Nissanaholic! Join Date: Dec 2001 Posts: 1,975 Trader Rating: (0) Feedback Score: 0 reviews	Man, you don't check the boards for a couple days and look what you miss out on.  Anyway, i have a new (at least new to me) theory on judging on whether a particular modification will actually make it faster.  If you took 2 dyno charts, one before and one after the modification, and using calculus, found the area under the curve (hp,torque, or a combination of both, i don't really know), for each chart and compared them, the one with the most area would be the faster car wouldn't it?  This method would take into consideration losses in low end in exchange for gains in high end.  Of course you can consider RPM ranges as well.  Like when racing you never really dip down below 4750, so you could just find area from there to 6250 to find which car will be faster on the track.  Just something i'd been thinking about lately.

01-02-2002, 12:58 AM	#2
kitoro Zilvia Member Join Date: Jul 2001 Posts: 275 Trader Rating: (0) Feedback Score: 0 reviews	it's "simple" math. i already learnt that after i was reminded that a dyno chart should be compared to a normal distribution graph. at least you figured it out urself. i dun think i would've figured it out very quickly if i did it myself.

01-02-2002, 05:13 AM	#3
Grant Premium Member Join Date: Jun 2001 Location: 聖地牙哥 Posts: 2,647 Trader Rating: (0) Rides Gallery: Grant Feedback Score: 0 reviews	f**k calculus. lol.. It's all abotu statistics (well i nearly failed pre-calculus so.. haha..), but yea, i think that's the usual method. (Edited by Grant at 4:21 am on Jan. 2, 2002)