Equal length or Unequal ?????

5ohCOUPE · 02-11-2002, 05:33 PM

Just wondering if there is really a significant HP diferance between an equal legnth shorty header compared to an unequal length. I didnt notice any differance on my car. Still ran the same times with either one bolted on.

red82gt · 02-11-2002, 06:06 PM

Back in about 1996 MM&FF did a test of MAC equals, unequals, and longtubes. From what I remember the equal lengths made about 2 more ft/lbs at about 3000rpm, the full length made about an extra 15 ft/lbs and at the top end they were all about the same with the longtubes having a couple more, the equal length actually made 1 less hp than the unequals. They're supposed to scavenge more than the unequals to make more torque but if you want scavenging step up to the longtubes, kinda wish I did.

Unit 5302 · 02-11-2002, 08:06 PM

The more you scavenge with shorties, the less torque you have. Unequals should make more torque than equals. Equals won't do much more for you than unequals as far as hp is concerned. The headers that actually make a difference seem to be the long tubes.

Thad · 02-11-2002, 08:44 PM

the full length headers give good hp and help deliver a sound that is beautiful to the ears. They also look good!

Sonics2042 · 02-11-2002, 11:08 PM

If I want high quality full length headers, and I don't really want to have to deal with jacking up the engine, which are the best ones to get? BTW, I plan to get these for a 93 cobra and I want to lower the car by about 1.5 inches.

Are there any options? I really like BBK, and $$ isn't an issue unless it gets crazy. I plan to get a supercharger, so I don't want exhaust to be a bottleneck.

whiterod · 02-12-2002, 09:12 AM

if you are going with a supercharger, i would definatley go with the ceramic long tubes, but i think no matter what long tube you go with, you are going to have to jack up the motor. long tubes are a pain to install, but the benefits from having them are worth it

Sonics2042 · 02-12-2002, 10:33 AM

Ahh crud. Ummm...how hard is it to jack up the motor? What is involved?

Thanks,
DoranW

Dark_5.0 · 02-12-2002, 01:29 PM

It is easy money there is only one bolt at the bottom of each motor mount that you have to remove.

Sonics2042 · 02-12-2002, 01:40 PM

But then how do you jack it up/keep it up? Never done anything like this, and don't know anyhting about it

Thanks,
DoranW

Dark_5.0 · 02-12-2002, 01:54 PM

I put a board betwen my floor jack and oil pan and jacked it up.

Too easy

02-11-2002, 05:33 PM	#1
5ohCOUPE Registered Member Join Date: Sep 2001 Location: ORANGE PARK FL. USA Posts: 208	Equal length or Unequal ????? Just wondering if there is really a significant HP diferance between an equal legnth shorty header compared to an unequal length. I didnt notice any differance on my car. Still ran the same times with either one bolted on. __________________ 91 LX COUPE, 3.73 gears, 2 1/2 inch H-Pipe, 1 5/8 MAC long tube headers, 73 MM C&L MAF, 70 MM MAC TB, LUNATI cam,1.7 TFS Rockers, TFS Track Heat heads, TFS Track Heat intake, T5 with PRO 5.0 shifter, Griffin aluminum radiator, Fluid Damper, SSM traction bars, 190 GPH in tank fuel pump. And more to come.

02-11-2002, 06:06 PM	#2
red82gt Sober voice of Reason Join Date: Nov 1998 Location: Kelowna, B.C., Canada Posts: 1,514	Back in about 1996 MM&FF did a test of MAC equals, unequals, and longtubes. From what I remember the equal lengths made about 2 more ft/lbs at about 3000rpm, the full length made about an extra 15 ft/lbs and at the top end they were all about the same with the longtubes having a couple more, the equal length actually made 1 less hp than the unequals. They're supposed to scavenge more than the unequals to make more torque but if you want scavenging step up to the longtubes, kinda wish I did. __________________ 393W: AFR 205's, hydraulic roller, TKO600.

02-11-2002, 08:44 PM	#4
Thad Registered Member Join Date: Oct 1999 Location: Stuart, FL US Posts: 192	the full length headers give good hp and help deliver a sound that is beautiful to the ears. They also look good! __________________ 90 LX 5.0 ,bored 302, MSD 6AL, Twisted Wedge TrickFlo HDs, World class T5, BBK fender cold air induct., 70mm TB,Edelbrock performer Intake, aluminum Drve shaft, 3.55 Gears, Long Tube Headers to Flowmasters.

02-11-2002, 11:08 PM	#5
Sonics2042 Registered Member Join Date: Jul 2001 Location: Seattle, WA Posts: 381	If I want high quality full length headers, and I don't really want to have to deal with jacking up the engine, which are the best ones to get? BTW, I plan to get these for a 93 cobra and I want to lower the car by about 1.5 inches. Are there any options? I really like BBK, and $$ isn't an issue unless it gets crazy. I plan to get a supercharger, so I don't want exhaust to be a bottleneck. __________________ What I have: 1990 Red Mustang 5.0 LX: [BBK X-Pipe]-[MAC Cat-Back Exhaust] [MAC Cold Air Intake]-[BBK Equal Shorties] [3.55 Gears]-[Cobra Intake Manifold (Upper and Lower] [E-303 Cam]-[Granetelli Mass Air Flow Sensor] [Front and rear sway bars]-[New black carpet and seats.] [Adjustable Fuel Regulator]-[T5 Conversion w/ K. Cobra Clutch/Hurst STS] [Cobra Throttle Body]-[130A Alt. Conversion] Thinking about: Aftermarket Heads! Vortech A-Trim

02-12-2002, 09:12 AM	#6
whiterod Registered Member Join Date: Sep 2001 Location: zachary, la Posts: 73	if you are going with a supercharger, i would definatley go with the ceramic long tubes, but i think no matter what long tube you go with, you are going to have to jack up the motor. long tubes are a pain to install, but the benefits from having them are worth it __________________ GT-40X(58cc)heads, cobra upper&lower, FMS 65mm TB, 75mm Bullet, 24# injectors, 190 lph fuel pump, moroso cold air intake, BBK 1 5/8 equal length headers, flowmaster cat back, 1.7 cobra rockers, crane 2031, T5Z gear box, centerforce dual friction, mcleod bullet proof bellhousing, 3.55 gears, hurst billet shifter with over 193,000 miles. thanks to all who contributed

02-11-2002, 08:06 PM	#3
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	The more you scavenge with shorties, the less torque you have. Unequals should make more torque than equals. Equals won't do much more for you than unequals as far as hp is concerned. The headers that actually make a difference seem to be the long tubes.

02-12-2002, 10:33 AM	#7
Sonics2042 Registered Member Join Date: Jul 2001 Location: Seattle, WA Posts: 381	Ahh crud. Ummm...how hard is it to jack up the motor? What is involved? Thanks, DoranW

02-12-2002, 01:29 PM	#8
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	It is easy money there is only one bolt at the bottom of each motor mount that you have to remove. __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

02-12-2002, 01:40 PM	#9
Sonics2042 Registered Member Join Date: Jul 2001 Location: Seattle, WA Posts: 381	But then how do you jack it up/keep it up? Never done anything like this, and don't know anyhting about it Thanks, DoranW

02-12-2002, 01:54 PM	#10
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	I put a board betwen my floor jack and oil pan and jacked it up. Too easy __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

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