© Copyright 1995 thru 2008 - The Mustang Works™. All Rights Reserved.
MustangWorks.com is designed and hosted by Aero3 Media.
MustangWorks.com is designed and hosted by Aero3 Media.
|
03-11-2007, 07:01 PM | #1 |
Registered Member
Join Date: Jun 2002
Location: Portage
Posts: 239
|
Not enough back pressure?
Well i got my stang out of storage the other day and put the cats back on for my emissions test. It feels to me like that car has better power with the converters on then off. Am i nuts? the car has 100k miles on it. Any one have a idea on this? Thanks
__________________
'95 GT convert. K&N, C&L mass air meter, Performance distributors sreamin demon coil, dyna mod, live wires, king cobra clutch, flowmaster american thunder exhaust, UPR billet adjustable shift handle, Crane Cams Fireball HI-6 box,underdrive pullies, 255lph fuel pump, UPr short throw shifter, caster camber plates, 03 cobra lower A arms, bullit suspension, cobra front brakes |
03-11-2007, 08:33 PM | #2 |
Registered Member
Join Date: Dec 2006
Location: new york
Posts: 482
|
Re: Not enough back pressure?
whats up man...what kind of exhaust do u have
__________________
347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters ^best et so far 11.6 1.61 60ft coming soon 9sec et's 1992 mustang gt 2001 gmc 1500 4x4 78 century boat 92 skidoo |
03-12-2007, 11:47 AM | #3 |
Registered Member
Join Date: Aug 2002
Location: SanAntonio, Tx
Posts: 957
|
Re: Not enough back pressure?
Hmm, good post, cuz ever since i cut my tailpipes off, i havent been able to run as fast in the 1/4, but pretty close.
I wonder if it hurts the torque that much? Im pretty sure an n/a 5.0 will feel more torque with Some backpressure, anyone have any dyno test to confirm this?
__________________
X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear |
03-12-2007, 12:53 PM | #4 |
Registered Member
Join Date: Jun 2002
Location: Portage
Posts: 239
|
Re: Not enough back pressure?
Well i did some research and found that you can infact have too little backpressure. Without the back pressure you get too much scaveging and actuallly suck fuel and air out the exhaust causing a lean condition, killing torque. To conteract you have to have a fuel injection system that can correct for this problem. Im getting a adjustable fuel pressure regulator and see if i can richen it up. If that doesnt work i guess ill get the upr cat xpipe.
__________________
'95 GT convert. K&N, C&L mass air meter, Performance distributors sreamin demon coil, dyna mod, live wires, king cobra clutch, flowmaster american thunder exhaust, UPR billet adjustable shift handle, Crane Cams Fireball HI-6 box,underdrive pullies, 255lph fuel pump, UPr short throw shifter, caster camber plates, 03 cobra lower A arms, bullit suspension, cobra front brakes |
03-12-2007, 01:28 PM | #5 |
Registered Member
Join Date: Aug 2002
Location: SanAntonio, Tx
Posts: 957
|
Re: Not enough back pressure?
i seem to have a rich condition, but of course it may seem that way because i smell more exhaust, and with no cat's, i almost want cat's so it wont stink as much, do you have the smog pump?
__________________
X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear |
03-12-2007, 01:38 PM | #6 |
Registered Member
Join Date: Apr 2001
Location: Gallatin, Tn
Posts: 1,326
|
Re: Not enough back pressure?
I picked up a tenth and .5mph with dumps.....
__________________
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Back pressure measurement? | Rev | Windsor Power | 3 | 10-08-2003 10:13 PM |
Back pressure | Nicodemus | Small Ponies | 1 | 02-11-2003 07:48 PM |
Fuel pressure regulator..proper way to set pressure... | Reipen | Windsor Power | 0 | 05-27-2002 01:41 PM |
Back pressure good or bad? | RAGE_5.0 | Blue Oval Lounge | 8 | 11-23-2001 02:00 PM |
Eanough Back Pressure???? | BowTie Eater 5 Liter | Windsor Power | 1 | 04-08-2001 08:32 AM |