Dyno number correction..the torque..
10-21-2001, 12:01 AM
#1
Dyno number correction..the torque..
i posted my dyno numbers in my earlier thread and there's been a mistake for my TQ numbers...
my max torque is not 182ft-lbs@6,400rpm....it's actually 201ft-lbs@4,400rpm...my torque curve reached its highest point at 4,400rpm and not at 6,400rpm...
here's the corrected dyno numbers..
Max Power: 204hp@6,400rpm
Max Torque: 201ft-lbs@4,400rpm
i had a gain of 6hps from the previous dyno and a gain of nearly 15ft-lbs of torque.
my max torque is not 182ft-lbs@6,400rpm....it's actually 201ft-lbs@4,400rpm...my torque curve reached its highest point at 4,400rpm and not at 6,400rpm...
here's the corrected dyno numbers..
Max Power: 204hp@6,400rpm
Max Torque: 201ft-lbs@4,400rpm
i had a gain of 6hps from the previous dyno and a gain of nearly 15ft-lbs of torque.
10-21-2001, 01:48 AM
#3
Re: Re: Dyno number correction..the torque..
Originally posted by GT_icecream
201 !?!? How's that? I don't recall that guy said anything after the dyno was done...... and there's no correction to the HP, just torque ?
201 !?!? How's that? I don't recall that guy said anything after the dyno was done...... and there's no correction to the HP, just torque ?
what are you doing up this late anywayz?
10-22-2001, 12:42 AM
#8
ok...let's see...
from Stillen's dyno chart..when they give u a print out of your max power and max torque, the computer prints out the highest number for both..ideally for your max power, this would be around 6,400-6,500rpm and for torque, it'd be around 4,400-4,500rpm...after 4,500rpm, your torque goes down quiet alot...
when i dynoed from Premier autoworks in La Habra, Ca...the computer printed out the numbers for my power and torque @ 6,400rpm..so, i got my peak power of 204fwhp@6,400rpm and my torque 182ft-lbs@6,400rpm(which the computer used) also. but torque peaked at 4,400rpm hitting 201ft-lbs(which the computer did not use) then climbed down to 182ft-lbs when i got the max power at 6,400rpm.
now, Stillen and JWT uses the highest point of your torque curve for your max torque figure(and not where u get the max hp), and others(Jackson racing and Hanh motorsports)use the point where u get the max hp...
my guess is that there's a difference between a 'peak' torque and a 'max' torque...'max' torque is the highest point of your torque curve(in our case 4,400-4,500rpm) and 'peak' torque would be where u get your max hps(near the redline)..
from my previous runs from Stillen, when i registered 198fwhp@6,400rpm and 185ft-lbs of torque@4,400rpm...when i looked at my torque @6,400rpm instead of 4,400rpm...the torque was only 164ft-lbs...
from Stillen's dyno chart..when they give u a print out of your max power and max torque, the computer prints out the highest number for both..ideally for your max power, this would be around 6,400-6,500rpm and for torque, it'd be around 4,400-4,500rpm...after 4,500rpm, your torque goes down quiet alot...
when i dynoed from Premier autoworks in La Habra, Ca...the computer printed out the numbers for my power and torque @ 6,400rpm..so, i got my peak power of 204fwhp@6,400rpm and my torque 182ft-lbs@6,400rpm(which the computer used) also. but torque peaked at 4,400rpm hitting 201ft-lbs(which the computer did not use) then climbed down to 182ft-lbs when i got the max power at 6,400rpm.
now, Stillen and JWT uses the highest point of your torque curve for your max torque figure(and not where u get the max hp), and others(Jackson racing and Hanh motorsports)use the point where u get the max hp...
my guess is that there's a difference between a 'peak' torque and a 'max' torque...'max' torque is the highest point of your torque curve(in our case 4,400-4,500rpm) and 'peak' torque would be where u get your max hps(near the redline)..
from my previous runs from Stillen, when i registered 198fwhp@6,400rpm and 185ft-lbs of torque@4,400rpm...when i looked at my torque @6,400rpm instead of 4,400rpm...the torque was only 164ft-lbs...
10-22-2001, 12:47 AM
#9
Originally posted by madmax2k
Ive never seen an N/A Max dyno that showed 200+ ft lb to the wheels! What did you do to pick up the 15 ft lbs?
Ive never seen an N/A Max dyno that showed 200+ ft lb to the wheels! What did you do to pick up the 15 ft lbs?
your torque numbers were also taken from the highest point of your curve...around 190ft-lbs...now if you took the torque number from the end of the chart, you'd get around 160-165ft-lbs only...
as far as the torque jump from my previous runs...well, i've added GReddy Evo catback, a pulley, and dual fuel pressure regulators...but to dial in 208fwhp from a y-pipe and a CAI...now that's impressive...
10-22-2001, 09:13 AM
#11
Senior Member
Join Date: Sep 2000
Posts: 939
Originally posted by irvine78
you have some nice dyno numbers as well..did u have a fan when you ran ur car? i didn't have one..wish i had a fan for better results..but..still...
you have some nice dyno numbers as well..did u have a fan when you ran ur car? i didn't have one..wish i had a fan for better results..but..still...
your torque numbers were also taken from the highest point of your curve...around 190ft-lbs...now if you took the torque number from the end of the chart, you'd get around 160-165ft-lbs only...
as far as the torque jump from my previous runs...well, i've added GReddy Evo catback, a pulley, and dual fuel pressure regulators...but to dial in 208fwhp from a y-pipe and a CAI...now that's impressive...
My 208 whp reading is a tad high. If you look closely at all 5 speed Maxima dyno plots, you will see a small "blip" right at redline (if the car is taken to rdline on the dyno). This "blip", due to the Maxima's power curve shape (peak power at redline), give a MAX power reading that is about 2-3 whp high. In reality, peak power on my dyno runs should be in the 205 hp range.
But, that was with the Y-pipe and CAI. Im back to the 191 whp level now as I pulled the 2 mods off.
10-23-2001, 12:48 AM
#12
Originally posted by Y2KevSE
Please do not Photoshop your dyno curves anymore.
Where did you get the FPR's? Did you bypass the stock FPR's?
Please do not Photoshop your dyno curves anymore.
Where did you get the FPR's? Did you bypass the stock FPR's?
got the FPRs from Premier...they are B&Ms...adjustable..
10-23-2001, 11:29 AM
#16
Originally posted by Y2KevSE
Did you bypass the stock FPR's? If you did, where'd you get the adapter? Thanks!
Your PS'ed dyno secret is safe with me.
Did you bypass the stock FPR's? If you did, where'd you get the adapter? Thanks!
Your PS'ed dyno secret is safe with me.
nope...i didn't bypass the stock FPRs...i removed the stock units and installed 2 adjustable B&M FPRs..
the only reason i did these was because my car was running hella lean..my stock fuel pressure was like 30psi...right now, i'm running a constant 45psi, unless i got wot(then it goes up to highest..i think all the way up to 85psi or something...not sure...)
and uh...there're no secret with my dyno chart...i'm just trying to compare the latest one to the two dynos from Stillen...
10-23-2001, 11:36 AM
#17
Originally posted by UMD_MaxSE
hmmm... do you have more info on these? Did using new FPRs give you a noticeable gain? Thanks!
hmmm... do you have more info on these? Did using new FPRs give you a noticeable gain? Thanks!
ok...i tried telling this to our beloved 'K-E-V-I-N-G'
, but oh well, here we go again...since my last dyno at the Maxima day, i've added my GReddy cat-back, UR Pulley, and 2 fuel pressure regulators as far as the performance mod's concerned...
@4,400rpm, the higest torque i ever got from Stillen dyno was 185ft-lbs(before the exhaust, pulley and FPRs)..at the same rpm, my torque was 201ft-lbs after the mods...
i can't tell u how much torque FPR alone gives you...but right after the FPRs(i did this before my GReddy and my pulley), my car did pull alot stronger than before...
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