longtube power?

fastang · 02-23-2001, 03:18 PM

I was just wondering how beneficial longtubes are and what the typical hp incrase is. I have had a whole system with longtubes-catback for a while but havent installed it yet. With my mods an exhaust system should bring a decent increase right? They advertise a lot but I want to know the truth. thanks.

------------------
95GT B303 cam, 1.7 rockers, 65mm TB, 73mm MAF, milled heads, 355's K&N, off road pipes, pulleys, msd coil, 9mm wires, Tremec 3550, Pro5.0 shifter,10.5 Motorsport clutch, weld in subframe connectors

n2ojunkie · 02-24-2001, 04:55 AM

they will kill your low end torque and give you more top end. with your stock intake it might creat a mis match in power band. if you get an intake it would make a larger gain. and be beter matched.

SaleenGTS · 02-24-2001, 09:30 AM

Are you on N20??? or on crack?
Have you ever used longtubes? They DO NOT kill your low end, they actually give you more torque, and also more top end power.

I have never seen low end decreases, and I don't think anyone else on here has either.

------------------
Dustin
1993 Cobra #1926

Bassani Full lengths,Bassani short X-pipe, American thunder Cat back, 3.55's. More to come...

Phil Ossifer · 02-24-2001, 09:53 AM

Ya, the nitrous is supposed to go into the engines intake not the drivers.....

Long tubes are the only way to go if you want to make power! Even on a bone stock 302, long tubes are "Not" gonna’ kill low end torque. That a fallacy manufactured by people who want an easy way out to installing long tubes.

I’ll say it over and over, again and again, Shorties are a complete waste of money, time and material. There is a natural restriction in all short tube headers at the connection to the H-pipe that you can’t eliminate. No matter how well the pipes scavenge, that built in restriction is gonna’ kill any gains in flow. The Shortie makers forgot to tell us that ‘cause they want you to buy their products.

You wanna’ make power on the low end and top end, go with long tube headers and don’t listen to all the hogwash about them killing low end torque... It just ain’t true!

Phil

Capri306 · 02-24-2001, 10:48 AM

For real. I'm running BBK long tubes on my '79 Merc, and I can't tell you how *******' FLAT the torque curve feels on that car! Pulls all the way to the max shift points hard, even with my 2.73's. Full lengths aren't that hard to install, either, IMHO. Boohoohoo to those who won't.

------------------
Capri306, Moderator, The Mustang Works Online
1979 Mercury Capri, 5.0L -- C4 -- 2.73
1987 Mustang LX Notch

86GT · 02-24-2001, 01:05 PM

Longtubes even on a stock engine, will make a lot more power AND torque. I speak from experience, with shorties and long tubes, the long tubes definitely make power across the range. As long as they aren't mismatched (ie 1 3/4" primaries on a stock head).

NO SLO PK · 02-24-2001, 01:42 PM

Yeah, from personal experience, the longtubes give more torque and hp than most short tube configurations. Perhaps if you lose some low end by installing the longtubes, you'll need to tune the A/F to get it back. Personally, I gained 2.5 mph with longtubes. I know fellow stangers who have gained even more.

------------------
'91 LX
Procharger, 3 row intercooler, extrude honed Cobra intake, Mac full Length Headers, 30# inj., 73mm C&L, 75mm tb, E303 cam, 289 rods, ported E7 heads, MSD, T-Rex w/255 lph Walbro, 5 lug conversion, Cobra R wheels, 3.27 gears and Moser Axles.

fastang · 02-24-2001, 02:46 PM

Hey 88GT, I think I might have that mismatch problem you were talkin about. That was the only size summit offered so I bought it. If I port match the exh ports will that make up for the difference? The tubing looks fatter than the flange that meets the head. The flange is about the same size as my head ports already but the tubing looks larger. Would the fact that I have a decent cam make up for the larger tubing since it will be making more exhaust than stock? Please let me know.

------------------
95GT B303 cam, 1.7 rockers, 65mm TB, 73mm MAF, milled heads, 355's K&N, off road pipes, pulleys, msd coil, 9mm wires, Tremec 3550, Pro5.0 shifter,10.5 Motorsport clutch, weld in subframe connectors

2FastLX · 02-24-2001, 02:51 PM

I have L/T's and a 2 1/2" exhaust system. I gained tons of power over the stock exhaust. You won't regret it.

fastang · 02-24-2001, 03:32 PM

Sweet! My first two gears are great by my top end lags. Im realy hoping this will help my 3rd gear. I can usaly take most LS1's by a good carlength untill I hit 3rd and my exh chokes me out of the race.

------------------
95GT B303 cam, 1.7 rockers, 65mm TB, 73mm MAF, milled heads, 355's K&N, off road pipes, pulleys, msd coil, 9mm wires, Tremec 3550, Pro5.0 shifter,10.5 Motorsport clutch, weld in subframe connectors

Skyman · 02-24-2001, 04:07 PM

Are you going to put them on before carlsbad? Anyways, I may sell my upper intake as soon as I find a RPM upper, if your interested, Ill let it for for $99, its $300 new.

Skyler

------------------
-1989 Saleen Mustang #406-TFS Heads, E-303 Cam, Edelbrock Intake, and more.
-Videos (MPEG)-
0-110MPH In car view (963k)
All Throttle through 3 gears! (497k)
Tire Smoking Burnout! (218k)

fastang · 02-24-2001, 04:43 PM

Sky, I will DEFINITLEY have them on by then. I am installing upr and lwr fact 5 conroll arms, Longtubes, hpipe, flowmaster cat back and an aluminum driveshaft next saturday. Im taking the day off work to do it. If I can scrounge up the money I am going to TRY to get a complete GT40 intake, some drag radials or nittos and a dyno tune before then too. I dont think your upr itake will match my factory lower will it? If it will then I will definitly buy it and port my lower.

------------------
95GT B303 cam, 1.7 rockers, 65mm TB, 73mm MAF, milled heads, 355's K&N, off road pipes, pulleys, msd coil, 9mm wires, Tremec 3550, Pro5.0 shifter,10.5 Motorsport clutch, weld in subframe connectors

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02-23-2001, 03:18 PM	#1
fastang Registered Member Join Date: Aug 2000 Location: santa ana ca Posts: 1,349	longtube power? I was just wondering how beneficial longtubes are and what the typical hp incrase is. I have had a whole system with longtubes-catback for a while but havent installed it yet. With my mods an exhaust system should bring a decent increase right? They advertise a lot but I want to know the truth. thanks. ------------------ 95GT B303 cam, 1.7 rockers, 65mm TB, 73mm MAF, milled heads, 355's K&N, off road pipes, pulleys, msd coil, 9mm wires, Tremec 3550, Pro5.0 shifter,10.5 Motorsport clutch, weld in subframe connectors

02-24-2001, 04:55 AM	#2
n2ojunkie Registered Member Join Date: Jan 2001 Location: san diego, ca Posts: 17	they will kill your low end torque and give you more top end. with your stock intake it might creat a mis match in power band. if you get an intake it would make a larger gain. and be beter matched.

02-24-2001, 09:30 AM	#3
SaleenGTS RICE taste like Chicken Join Date: Jun 2000 Location: Edmond, OK Posts: 687	Are you on N20??? or on crack? Have you ever used longtubes? They DO NOT kill your low end, they actually give you more torque, and also more top end power. I have never seen low end decreases, and I don't think anyone else on here has either. ------------------ Dustin 1993 Cobra #1926 Bassani Full lengths,Bassani short X-pipe, American thunder Cat back, 3.55's. More to come...

02-24-2001, 09:53 AM	#4
Phil Ossifer Registered Member Join Date: Jan 1999 Location: Sterling Heights, Michigan Posts: 217	Ya, the nitrous is supposed to go into the engines intake not the drivers..... Long tubes are the only way to go if you want to make power! Even on a bone stock 302, long tubes are "Not" gonna’ kill low end torque. That a fallacy manufactured by people who want an easy way out to installing long tubes. I’ll say it over and over, again and again, Shorties are a complete waste of money, time and material. There is a natural restriction in all short tube headers at the connection to the H-pipe that you can’t eliminate. No matter how well the pipes scavenge, that built in restriction is gonna’ kill any gains in flow. The Shortie makers forgot to tell us that ‘cause they want you to buy their products. You wanna’ make power on the low end and top end, go with long tube headers and don’t listen to all the hogwash about them killing low end torque... It just ain’t true! Phil

02-24-2001, 10:48 AM	#5
Capri306 Moderator Join Date: Sep 1998 Location: Grand Rapids, Michigan, USA Posts: 1,001	For real. I'm running BBK long tubes on my '79 Merc, and I can't tell you how *****' FLAT the torque curve feels on that car! Pulls all the way to the max shift points hard, even with my 2.73's. Full lengths aren't that hard to install, either, IMHO. Boohoohoo to those who won't. ------------------ Capri306, Moderator, The Mustang Works Online** 1979 Mercury Capri, 5.0L -- C4 -- 2.73 1987 Mustang LX Notch

02-24-2001, 01:05 PM	#6
86GT Sniffed too much n20 Join Date: Oct 1998 Location: Ont, Canada Posts: 1,018	Longtubes even on a stock engine, will make a lot more power AND torque. I speak from experience, with shorties and long tubes, the long tubes definitely make power across the range. As long as they aren't mismatched (ie 1 3/4" primaries on a stock head).

02-24-2001, 01:42 PM	#7
NO SLO PK Registered Member Join Date: Mar 1999 Location: Arcadia, CA, USA Posts: 731	Yeah, from personal experience, the longtubes give more torque and hp than most short tube configurations. Perhaps if you lose some low end by installing the longtubes, you'll need to tune the A/F to get it back. Personally, I gained 2.5 mph with longtubes. I know fellow stangers who have gained even more. ------------------ '91 LX Procharger, 3 row intercooler, extrude honed Cobra intake, Mac full Length Headers, 30# inj., 73mm C&L, 75mm tb, E303 cam, 289 rods, ported E7 heads, MSD, T-Rex w/255 lph Walbro, 5 lug conversion, Cobra R wheels, 3.27 gears and Moser Axles.

02-24-2001, 02:46 PM	#8
fastang Registered Member Join Date: Aug 2000 Location: santa ana ca Posts: 1,349	Hey 88GT, I think I might have that mismatch problem you were talkin about. That was the only size summit offered so I bought it. If I port match the exh ports will that make up for the difference? The tubing looks fatter than the flange that meets the head. The flange is about the same size as my head ports already but the tubing looks larger. Would the fact that I have a decent cam make up for the larger tubing since it will be making more exhaust than stock? Please let me know. ------------------ 95GT B303 cam, 1.7 rockers, 65mm TB, 73mm MAF, milled heads, 355's K&N, off road pipes, pulleys, msd coil, 9mm wires, Tremec 3550, Pro5.0 shifter,10.5 Motorsport clutch, weld in subframe connectors

02-24-2001, 02:51 PM	#9
2FastLX The Photoshop Guru Join Date: Feb 2001 Location: Mecca, Indiana Posts: 1,419	I have L/T's and a 2 1/2" exhaust system. I gained tons of power over the stock exhaust. You won't regret it.

02-24-2001, 03:32 PM	#10
fastang Registered Member Join Date: Aug 2000 Location: santa ana ca Posts: 1,349	Sweet! My first two gears are great by my top end lags. Im realy hoping this will help my 3rd gear. I can usaly take most LS1's by a good carlength untill I hit 3rd and my exh chokes me out of the race. ------------------ 95GT B303 cam, 1.7 rockers, 65mm TB, 73mm MAF, milled heads, 355's K&N, off road pipes, pulleys, msd coil, 9mm wires, Tremec 3550, Pro5.0 shifter,10.5 Motorsport clutch, weld in subframe connectors

02-24-2001, 04:07 PM	#11
Skyman I need 110mph Trap Speed! Join Date: Feb 1999 Location: So, CA Posts: 4,315	Are you going to put them on before carlsbad? Anyways, I may sell my upper intake as soon as I find a RPM upper, if your interested, Ill let it for for $99, its $300 new. Skyler ------------------ -1989 Saleen Mustang #406-TFS Heads, E-303 Cam, Edelbrock Intake, and more. -Videos (MPEG)- 0-110MPH In car view (963k) All Throttle through 3 gears! (497k) Tire Smoking Burnout! (218k)

02-24-2001, 04:43 PM	#12
fastang Registered Member Join Date: Aug 2000 Location: santa ana ca Posts: 1,349	Sky, I will DEFINITLEY have them on by then. I am installing upr and lwr fact 5 conroll arms, Longtubes, hpipe, flowmaster cat back and an aluminum driveshaft next saturday. Im taking the day off work to do it. If I can scrounge up the money I am going to TRY to get a complete GT40 intake, some drag radials or nittos and a dyno tune before then too. I dont think your upr itake will match my factory lower will it? If it will then I will definitly buy it and port my lower. ------------------ 95GT B303 cam, 1.7 rockers, 65mm TB, 73mm MAF, milled heads, 355's K&N, off road pipes, pulleys, msd coil, 9mm wires, Tremec 3550, Pro5.0 shifter,10.5 Motorsport clutch, weld in subframe connectors