Power Loss After Adding Mods???

MellowYellow · May 8th, 2008, 05:06 PM

I added a 75mm throttle body, plenum and diablosport tune and went from 331hp to 347hp and the torque went from 427 to 425. Don't you think the hp gain is a little small and the torque loss it a little weird? The only thing I can think of is that they were on different dynos. Anybody know why?

White99stang · May 8th, 2008, 05:15 PM

different dynos, different weather, the only way you can SEE the power on a dyno from mods is to dyno it at a exact temp outside, exact car temp, same day and all.

GJ Rodriguez · May 8th, 2008, 05:19 PM

exactly, but still really good numbers...
congrats

B0B · May 8th, 2008, 05:22 PM

i wouldn't worry about it. the best way to tell if your mods are working is to take it to the track.. dyno's can be misleading.

bigmike83 · May 8th, 2008, 05:23 PM

what kinda dynos where they?

putermech · May 8th, 2008, 07:43 PM

Why use hand held tuner when you have the use of a dyno?

FoxHoss · May 8th, 2008, 10:36 PM

thats normal in some cases actually, depending on your mod seyup and everything its not unusuall to gain hp and lose tourqe, or vise versa... if you ask people who dyno tune cars they would say the same

MellowYellow · May 9th, 2008, 01:25 AM

Alright good to know. It was bugging me.

MellowYellow · May 9th, 2008, 01:27 AM

Originally Posted by bigmike83

what kinda dynos where they?

I'm pretty sure they were both dynojet but i'm not 100% postive.

Scott2001GT · May 9th, 2008, 11:45 AM

the 75 mm t.b might not be the best. You need a pretty good air flow to really make it worth the 5mm gain over the 70mm.

bigmike83 · May 9th, 2008, 11:53 AM

Originally Posted by Hillsbaseball08

I'm pretty sure they were both dynojet but i'm not 100% postive.

i've heard different numbers between mustang dynos and dyno jet numbers.

MellowYellow · May 9th, 2008, 04:50 PM

Originally Posted by bigmike83

i've heard different numbers between mustang dynos and dyno jet numbers.

Do the mustang dynos get better #s because the first time I ran it it was at dallas mustang so there is a good chance that it was a mustang dyno. Im positve that the second one was a dynojet though.

bigmike83 · May 9th, 2008, 05:58 PM

mustang dynos get worse #s. sucks cause thats what i was tuned on. was the bottle pressure at the same psi as the time before. you might have got a bad bottle fill also

MellowYellow · May 9th, 2008, 06:05 PM

So many variables!

bigmike83 · May 9th, 2008, 06:22 PM

i know thats the only thing about the bottle but its cheap fast hp and lots of torque so thats why i bought a kit too

MellowYellow · May 9th, 2008, 06:29 PM

They have system that assists the nitrous and maintains the bottle pressure but I dont know if its worth the money. Tell me what you think.
Nano Nitrous Home

bigmike83 · May 9th, 2008, 06:40 PM

do you run a bottle heater and purge? also what psi where both runs made at

bigmike83 · May 9th, 2008, 06:42 PM

and i like that nitrous helper, but hell it cost as much as the nitrous kit. just stick with a good filled bottle, purge it before each run, and make sure the pressure is the same.

your car has alot left in it still. et wise for sure

MellowYellow · May 9th, 2008, 10:23 PM

Yea I have the bottle heater and purge but it's usually so hot down here that the heater doesn't do anything. Both of the runs were at the same psi

bigmike83 · May 9th, 2008, 10:42 PM

what kinda pressure are you running

May 8th, 2008, 05:06 PM	#1
MellowYellow No Homo 2002 Mustang GT New Engine! Join Date: Oct 2007 Location: Aggieland Texas Posts: 2,541	Power Loss After Adding Mods??? I added a 75mm throttle body, plenum and diablosport tune and went from 331hp to 347hp and the torque went from 427 to 425. Don't you think the hp gain is a little small and the torque loss it a little weird? The only thing I can think of is that they were on different dynos. Anybody know why? __________________ 07 GT500 & 2002 GT:

May 8th, 2008, 05:15 PM	#2
White99stang MM's nicest mod, :) Join Date: Aug 2005 Location: Hanover, MD Posts: 3,163	different dynos, different weather, the only way you can SEE the power on a dyno from mods is to dyno it at a exact temp outside, exact car temp, same day and all. __________________ Screw all of you 99 Mustang GT VT 302 Stroker 11.13@123 f.s. 7.5k 06 Dodge MegaCab Diesel 455rwhp/815rwtq REAL MEN DON'T USE BUTT PLUGS

May 8th, 2008, 05:22 PM	#4
B0B Boost gets you laid 2001 Mustang GT 12.93@113.7 (on the 18's) Join Date: Dec 2006 Location: Milton, WA Posts: 2,169	i wouldn't worry about it. the best way to tell if your mods are working is to take it to the track.. dyno's can be misleading. __________________ '01 GT. P1SC. MMR 900. CMS 2.5 Blower cams. #'s coming soon 2003 Rubicon (DD) 05 Suzuki SV650S 55mpg SOLD Boosted GT Club Founder www.myspace.com/jeepwheelerbob

May 8th, 2008, 05:23 PM	#5
bigmike83 Regular 1997 mustang gt 8.06 at 87mph 1/8th mile on a 50 shot Join Date: Nov 2006 Location: clarksville TN Posts: 284	what kinda dynos where they? __________________ 97 gt with 2004 pi motor,acufab intake and 75 mm bbk cold air kit,bbk long tube headers, off road h pipe,2 chamber flow, 3:73, diablo chip with dyno tune 269rwhp 301rwtq 5.4 SOHC FOR SALE pm me for details

May 8th, 2008, 07:43 PM	#6
putermech Regular 1999 GT Black Coupe Join Date: Mar 2007 Location: Oregon Posts: 70	Why use hand held tuner when you have the use of a dyno? __________________ #33243 5 Speed w/ Trac-control

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May 8th, 2008, 05:19 PM	#3
GJ Rodriguez Regular 2004 Mustang GT Join Date: Mar 2008 Location: Monterrey, México Posts: 97	exactly, but still really good numbers... congrats

May 8th, 2008, 10:36 PM	#7
FoxHoss Enthusiast 02' GT Join Date: Oct 2007 Location: Brooklyn, CT Posts: 643	thats normal in some cases actually, depending on your mod seyup and everything its not unusuall to gain hp and lose tourqe, or vise versa... if you ask people who dyno tune cars they would say the same __________________ Nitrous is like a hot girl with an STD... you wanna hit it, but your afraid of the consequences 02' GT~dd 88' F-350 460ci

May 9th, 2008, 01:25 AM	#8
MellowYellow No Homo 2002 Mustang GT New Engine! Join Date: Oct 2007 Location: Aggieland Texas Posts: 2,541	Alright good to know. It was bugging me. __________________ 07 GT500 & 2002 GT:

May 9th, 2008, 11:45 AM	#10
Scott2001GT MM Fanatic 2001 Mustang GT 13.874 Join Date: Mar 2008 Location: Missouri Posts: 3,381	the 75 mm t.b might not be the best. You need a pretty good air flow to really make it worth the 5mm gain over the 70mm.

May 9th, 2008, 05:58 PM	#13
bigmike83 Regular 1997 mustang gt 8.06 at 87mph 1/8th mile on a 50 shot Join Date: Nov 2006 Location: clarksville TN Posts: 284	mustang dynos get worse #s. sucks cause thats what i was tuned on. was the bottle pressure at the same psi as the time before. you might have got a bad bottle fill also __________________ 97 gt with 2004 pi motor,acufab intake and 75 mm bbk cold air kit,bbk long tube headers, off road h pipe,2 chamber flow, 3:73, diablo chip with dyno tune 269rwhp 301rwtq 5.4 SOHC FOR SALE pm me for details

May 9th, 2008, 06:05 PM	#14
MellowYellow No Homo 2002 Mustang GT New Engine! Join Date: Oct 2007 Location: Aggieland Texas Posts: 2,541	So many variables! __________________ 07 GT500 & 2002 GT:

May 9th, 2008, 06:22 PM	#15
bigmike83 Regular 1997 mustang gt 8.06 at 87mph 1/8th mile on a 50 shot Join Date: Nov 2006 Location: clarksville TN Posts: 284	i know thats the only thing about the bottle but its cheap fast hp and lots of torque so thats why i bought a kit too __________________ 97 gt with 2004 pi motor,acufab intake and 75 mm bbk cold air kit,bbk long tube headers, off road h pipe,2 chamber flow, 3:73, diablo chip with dyno tune 269rwhp 301rwtq 5.4 SOHC FOR SALE pm me for details

May 9th, 2008, 06:29 PM	#16
MellowYellow No Homo 2002 Mustang GT New Engine! Join Date: Oct 2007 Location: Aggieland Texas Posts: 2,541	They have system that assists the nitrous and maintains the bottle pressure but I dont know if its worth the money. Tell me what you think. Nano Nitrous Home __________________ 07 GT500 & 2002 GT:

May 9th, 2008, 06:40 PM	#17
bigmike83 Regular 1997 mustang gt 8.06 at 87mph 1/8th mile on a 50 shot Join Date: Nov 2006 Location: clarksville TN Posts: 284	do you run a bottle heater and purge? also what psi where both runs made at __________________ 97 gt with 2004 pi motor,acufab intake and 75 mm bbk cold air kit,bbk long tube headers, off road h pipe,2 chamber flow, 3:73, diablo chip with dyno tune 269rwhp 301rwtq 5.4 SOHC FOR SALE pm me for details

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May 9th, 2008, 06:42 PM	#18
bigmike83 Regular 1997 mustang gt 8.06 at 87mph 1/8th mile on a 50 shot Join Date: Nov 2006 Location: clarksville TN Posts: 284	and i like that nitrous helper, but hell it cost as much as the nitrous kit. just stick with a good filled bottle, purge it before each run, and make sure the pressure is the same. your car has alot left in it still. et wise for sure __________________ 97 gt with 2004 pi motor,acufab intake and 75 mm bbk cold air kit,bbk long tube headers, off road h pipe,2 chamber flow, 3:73, diablo chip with dyno tune 269rwhp 301rwtq 5.4 SOHC FOR SALE pm me for details

May 9th, 2008, 10:23 PM	#19
MellowYellow No Homo 2002 Mustang GT New Engine! Join Date: Oct 2007 Location: Aggieland Texas Posts: 2,541	Yea I have the bottle heater and purge but it's usually so hot down here that the heater doesn't do anything. Both of the runs were at the same psi __________________ 07 GT500 & 2002 GT:

May 9th, 2008, 10:42 PM	#20
bigmike83 Regular 1997 mustang gt 8.06 at 87mph 1/8th mile on a 50 shot Join Date: Nov 2006 Location: clarksville TN Posts: 284	what kinda pressure are you running __________________ 97 gt with 2004 pi motor,acufab intake and 75 mm bbk cold air kit,bbk long tube headers, off road h pipe,2 chamber flow, 3:73, diablo chip with dyno tune 269rwhp 301rwtq 5.4 SOHC FOR SALE pm me for details