So..why does the hp/trq decrease over the years?

Plays With Squirrels · June 20th, 2007, 11:57 AM

I'm trying to find out all reasons I can to see why our cars lose hp. I see how one guy's (Matt I think) said his puts out 192hp and 220 ft/lbs in his 96. All I can think of is:

worn spark plugs/ignition wires
crappy walmart air filters
deposits in throttle body,fuel injectors, cylinder walls, etc.
worn out exhaust pipes (maybe)

Anything else? I would like to get my car as close back to 215/285 as it can. This isn't important just something I'd like to know for future reference.

G.T. Rags · June 20th, 2007, 12:12 PM

ur car never was at 215 to the wheels. The hp number we get from the factory is an engine estimate. By the time the power runs down through the drivetrain we generally ten to loose 20-30 hp.

Matts car is a really bad example to get numbers from. His car wasn't tested under optimal conditions. His altittude is about 6000ft higher then sea level, which we all no thin air isn't good for anything.

ur best bet to actually put 215 to the wheels is upgrade ur coils n wires, ditch ur cats, pi intake manifold, and good plenum, tb combo with a plastic CAI

Plays With Squirrels · June 20th, 2007, 12:51 PM

20-30hp from the drivetrain, damn that sucks. If I'm lucky I'm putting out 170. No wonder the new models with a v6 can still give me a good run.

jersey98gt · June 20th, 2007, 02:38 PM

i dk about ditching the cats i heard you loose torque

DrHolliday · June 20th, 2007, 03:21 PM

you can loose a little torqu and hp in the bottom end, but you gain more in the top end b/c the engine can breath better.

jersey98gt · June 20th, 2007, 05:30 PM

Originally Posted by DrHolliday

you can loose a little torqu and hp in the bottom end, but you gain more in the top end b/c the engine can breath better.

ill buy that

Plays With Squirrels · June 20th, 2007, 05:32 PM

I'm not too crazy about having to rev near 6k just to reach peak hp. I hate that. To me 4400 is a good spot.

stanglifemike · June 20th, 2007, 05:42 PM

Yea my 98 doesnt dyno much better with everything that I've done to it. Dissapointing really, I gotta do the pi conversion!!

Plays With Squirrels · June 20th, 2007, 05:49 PM

^What are you pulling?

G.T. Rags · June 20th, 2007, 06:21 PM

Originally Posted by Plays With Squirrels

I'm not too crazy about having to rev near 6k just to reach peak hp. I hate that. To me 4400 is a good spot.

unless you have pi parts on you car (99-04intake heads cams) you dont need to be revving ur car past 48-4900rpms. 96-98 mustangs dramatically drop in power after that. Matt was reving his that high because he just recently swapped out his npi intake manifold for a pi intake manifold.

Plays With Squirrels · June 20th, 2007, 06:24 PM

Yeah, I know. I know the PIs get most of their power around 5800 or so for some but that's so close to redline and it takes longer to rev it up that high.

G.T. Rags · June 20th, 2007, 07:05 PM

6 k isn't really that close to redlining. Simple solution to taking to long to rev that high.........gears. Put some 3.73 or 4.10's and u'll get up there right quick

Plays With Squirrels · June 21st, 2007, 09:49 AM

What do 96s come with?

MustangMatt96GT · June 21st, 2007, 10:47 AM

2.73s, 3.08s, or 3.27s!

Plays With Squirrels · June 21st, 2007, 10:49 AM

I have a GT 5 speed. Which one's that?

Plays With Squirrels · June 21st, 2007, 11:13 AM

Oh, and you know what, I've never seen a pi intake manifold for sale that doesn't say it needs the pi heads. so how did you guys do that?

G.T. Rags · June 21st, 2007, 11:28 AM

http://www.moddedmustangs.com/forums...ap-vt1878.html

you should be able to find all your answers about a PI intake swap to NPI heads. If your stumpted somewhere along the way, just post a question in there and I'm sure someone will post an answer

Plays With Squirrels · June 21st, 2007, 11:35 AM

Oh ok, I see. He just siliconed the area on the npi head to avoid the coolant leak. Ehh, guess it works especially if you don't want to spend over a grand on new heads too.

MustangMatt96GT · June 21st, 2007, 11:46 AM

I can show you pictures of how much to use too!

What does you axle code say on your build sticker in the jam of the drivers door? If its M = 2.73s and the rest I can tell you if you need me too!

Plays With Squirrels · June 21st, 2007, 11:52 AM

Yeah, it's an M. Damn, I expected it to be 3 something. Cause I found a formula for calculating the speed and rpm based on the gears and differential and 3.55 I think was close to what I get. Maybe 2.73s will be more accurate.

June 20th, 2007, 11:57 AM	#1
Plays With Squirrels Regular 1996 Mustang GT Join Date: Jan 2007 Location: GA Posts: 61 iTrader: 0 reviews	So..why does the hp/trq decrease over the years? I'm trying to find out all reasons I can to see why our cars lose hp. I see how one guy's (Matt I think) said his puts out 192hp and 220 ft/lbs in his 96. All I can think of is: worn spark plugs/ignition wires crappy walmart air filters deposits in throttle body,fuel injectors, cylinder walls, etc. worn out exhaust pipes (maybe) Anything else? I would like to get my car as close back to 215/285 as it can. This isn't important just something I'd like to know for future reference.

June 20th, 2007, 02:38 PM	#4
jersey98gt Enthusiast Join Date: Jan 2007 Posts: 661 iTrader: 0 reviews	i dk about ditching the cats i heard you loose torque __________________ -BBK CAI, BASSANI CB + X, SCT 93 tune, 4.10s, Cobra brakes, Cobra R wrapped in nitto 555 tire. -College Football and studies take up the bulk of my time.

June 20th, 2007, 03:21 PM	#5
DrHolliday Enthusiast Join Date: Mar 2007 Location: New Port, NC Posts: 717 iTrader: 0 reviews	you can loose a little torqu and hp in the bottom end, but you gain more in the top end b/c the engine can breath better. __________________ Mustangless atm 2006 2500 HD Diesel. Built allison trans and other goodies

June 20th, 2007, 05:42 PM	#8
stanglifemike IBEATU 06 GT, 98 GT, & 93 Notch Join Date: Dec 2006 Location: Douglasville, GA Posts: 5,937 iTrader: 0 reviews	Yea my 98 doesnt dyno much better with everything that I've done to it. Dissapointing really, I gotta do the pi conversion!! __________________ 98 GT: some stuff 06 GT: more stuff 93 Notch: 4 cyl at birth, now 5.0 drivetrain and stock exterior and interior= True Sleeper Paxton/Vortech Crew Member #3 FRPP's #1 Dealer Injected Engineering BMR Suspension

June 21st, 2007, 10:47 AM	#14
MustangMatt96GT Proud American 1996 Mustang GT Join Date: Dec 2006 Location: Lakewood, CO Posts: 10,689 iTrader: 3 reviews	2.73s, 3.08s, or 3.27s! __________________ RIP Travis Billings Special Thanks to: Andrews Racing Transmissions Baseline Suspensions 25.3 SFI Chassis Build Never Lift Racecars

June 20th, 2007, 12:51 PM	#3
Plays With Squirrels Regular 1996 Mustang GT Join Date: Jan 2007 Location: GA Posts: 61 iTrader: 0 reviews	20-30hp from the drivetrain, damn that sucks. If I'm lucky I'm putting out 170. No wonder the new models with a v6 can still give me a good run.

June 20th, 2007, 05:32 PM	#7
Plays With Squirrels Regular 1996 Mustang GT Join Date: Jan 2007 Location: GA Posts: 61 iTrader: 0 reviews	I'm not too crazy about having to rev near 6k just to reach peak hp. I hate that. To me 4400 is a good spot.

June 20th, 2007, 05:49 PM	#9
Plays With Squirrels Regular 1996 Mustang GT Join Date: Jan 2007 Location: GA Posts: 61 iTrader: 0 reviews	^What are you pulling?

June 20th, 2007, 06:24 PM	#11
Plays With Squirrels Regular 1996 Mustang GT Join Date: Jan 2007 Location: GA Posts: 61 iTrader: 0 reviews	Yeah, I know. I know the PIs get most of their power around 5800 or so for some but that's so close to redline and it takes longer to rev it up that high.

June 21st, 2007, 09:49 AM	#13
Plays With Squirrels Regular 1996 Mustang GT Join Date: Jan 2007 Location: GA Posts: 61 iTrader: 0 reviews	What do 96s come with?

June 21st, 2007, 10:49 AM	#15
Plays With Squirrels Regular 1996 Mustang GT Join Date: Jan 2007 Location: GA Posts: 61 iTrader: 0 reviews	I have a GT 5 speed. Which one's that?

June 21st, 2007, 11:13 AM	#16
Plays With Squirrels Regular 1996 Mustang GT Join Date: Jan 2007 Location: GA Posts: 61 iTrader: 0 reviews	Oh, and you know what, I've never seen a pi intake manifold for sale that doesn't say it needs the pi heads. so how did you guys do that?

June 21st, 2007, 11:35 AM	#18
Plays With Squirrels Regular 1996 Mustang GT Join Date: Jan 2007 Location: GA Posts: 61 iTrader: 0 reviews	Oh ok, I see. He just siliconed the area on the npi head to avoid the coolant leak. Ehh, guess it works especially if you don't want to spend over a grand on new heads too.

June 21st, 2007, 11:46 AM	#19
MustangMatt96GT Proud American 1996 Mustang GT Join Date: Dec 2006 Location: Lakewood, CO Posts: 10,689 iTrader: 3 reviews	I can show you pictures of how much to use too! What does you axle code say on your build sticker in the jam of the drivers door? If its M = 2.73s and the rest I can tell you if you need me too! __________________ RIP Travis Billings Special Thanks to: Andrews Racing Transmissions Baseline Suspensions 25.3 SFI Chassis Build Never Lift Racecars

June 21st, 2007, 11:52 AM	#20
Plays With Squirrels Regular 1996 Mustang GT Join Date: Jan 2007 Location: GA Posts: 61 iTrader: 0 reviews	Yeah, it's an M. Damn, I expected it to be 3 something. Cause I found a formula for calculating the speed and rpm based on the gears and differential and 3.55 I think was close to what I get. Maybe 2.73s will be more accurate.

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