how much hp do headers add to my 1995 mustang - Ford Mustang Forum
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post #1 of 21 (permalink) Old 02-06-2011 Thread Starter
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Wink how much hp do headers add to my 1995 mustang

How much HP do bbk equal length headers and bbk O/R H-pipe add to my 95 mustang

95 mustang GT convertible__5-speed__MSD ignition box & Coil__BBK Equal length__BBK O/R H-pipes__Flowmasters__Cold air intake__255lph fuel pump__Mishimoto radiator
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post #2 of 21 (permalink) Old 02-06-2011
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With stock heads? Maybe 5-10 HP.

'94 Laser red 'vert. Still a 5-oh... for now
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post #3 of 21 (permalink) Old 02-07-2011
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With stock heads? Maybe 5-10 HP.
Yea its not a huge difference. I think unequals give a like 2-5hp more? Or do I have that the other way around?

I know full length give the best improvement.

1998 GT - CAI, trickflow intake, 3.73 gears, O/R x-pipe, flowmasters, short throw shifter, 24lb injectors. 155k miles
1995 GT vert - 1 of 36 5.0 Appx. 400,000~ factory motor miles (totaled, in garage)
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post #4 of 21 (permalink) Old 02-07-2011
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Yea its not a huge difference. I think unequals give a like 2-5hp more? Or do I have that the other way around?

I know full length give the best improvement.
Equal length shorties will allegedly give a small benefit over unequal shorties...

But that is a lot of PITA for 2 to 5 hp...

Long tubes will give the greatest gains...but may not be emissions legal...

In the end, minimal improvements on a stock engine...

Now, if you have aftermarket top-end, that is a different story...

Matt

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and it collects dust admirably while parked for repairs in the garage...

SOLD - 1995 Black Mustang GT, AODE. Loved it, but I had to let it go...

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post #5 of 21 (permalink) Old 02-07-2011
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Have you upgraded to 2.5" exhaust?

When the green light drops...
The Bullsh!t stops. :shiny:
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post #6 of 21 (permalink) Old 02-08-2011
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Just for asking it sake. How about with the Gt40p heads and Trick Flows TFS-51402000 cam? Stock explorer lower intake stock mustang upper.
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post #7 of 21 (permalink) Old 02-08-2011
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Well, its not really a matter of if you need to or should get some headers with the 40P heads...

Folks can "make stock headers work" with a hammer and more determination and tool fabrication than I would ever care to perform...

But, realistically, you have a limited number of options with the P heads...

You need Ford Racing shorties, MAC shorties, BBK longtubes, MAC longtubes...maybe another long tube brand...not too sure...

SO, the difference between stock and shorty headers is one works and the other really doesn't...

Long tubes are noticeably better than shorties, just like before...

Matt

2006 GT - Vortech polished w/ intercooler, Eibach suspension, Hurst short-throw, some other goodies - tuned by Paul's High Performance. It moves...

and it collects dust admirably while parked for repairs in the garage...

SOLD - 1995 Black Mustang GT, AODE. Loved it, but I had to let it go...

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post #8 of 21 (permalink) Old 02-09-2011
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Quote:
Originally Posted by thomasmustang View Post
How much HP do bbk equal length headers and bbk O/R H-pipe add to my 95 mustang
About 10-12rwhp. You'll gain at least 5rwhp more with long tubes though (I have MAC LTs) and they'll fit onto any non-stock head including the GT40P.


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JLT 3 CAI, DIY CMDPs, Steeda UDPs, FRPP X-pipe, Brenspeed 91 tune
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post #9 of 21 (permalink) Old 11-02-2011
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10.4 in the 1/8th that is real real slow. i was going to sell my car and get a 1995 mustang but i think ill just keep it. my honda with a stock 1.5 single cam runs a 10.5
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10.4 in the 1/8th that is real real slow. i was going to sell my car and get a 1995 mustang but i think ill just keep it. my honda with a stock 1.5 single cam runs a 10.5
nice first post there buddy. but youre full of poop.
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Quote:
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10.4 in the 1/8th that is real real slow. i was going to sell my car and get a 1995 mustang but i think ill just keep it. my honda with a stock 1.5 single cam runs a 10.5
I didn't put much money into my '95 GT but it'll run the 1/8 in 8.65 and piss all over your Honda, so you might want to think again about not buying one. Yes, they are comparatively slow in stock form but it's very easy to make them much faster.


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JLT 3 CAI, DIY CMDPs, Steeda UDPs, FRPP X-pipe, Brenspeed 91 tune
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Equal lengths equalize scavaging to each cylinder giving each cylinder just as much fresh air as the others. It does theoretically improve power gains due to all cylinders ability to recieve cleaner intake charges. Due to less residual exhaust gasses being present after exhaust stroke. Shortys will gain more in top end power vs. longtubes. (The gains will be much more noticible at high rpm w/ shortys). As for longtubes same story about equal and unequal lengths but there powergains are noticed generally throughout the rpm's. Low revving motors longtubes are desirable. Street cars dont really need the low end torque. On the flip side longtubes dont really get you through emissions....
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Quote:
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Equal lengths equalize scavaging to each cylinder giving each cylinder just as much fresh air as the others. It does theoretically improve power gains due to all cylinders ability to recieve cleaner intake charges. Due to less residual exhaust gasses being present after exhaust stroke. Shortys will gain more in top end power vs. longtubes. (The gains will be much more noticible at high rpm w/ shortys). As for longtubes same story about equal and unequal lengths but there powergains are noticed generally throughout the rpm's. Low revving motors longtubes are desirable. Street cars dont really need the low end torque. On the flip side longtubes dont really get you through emissions....
Really....how do you figure?

2014 V6 Deep Impact Blue Mustang, Borla Type S, 2.73 (Uughh need 3.73)
1989 Sonic Blue Mustang LX Coupe, 349 ci,
392 rwhp 424 rwtq....Mustang Dyno
"There are three kinds of men. The one that learns by reading. The few who learn by observation. The rest of them have to pee on the electric fence for themselves." -Will Rogers-
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super fords did a test with equal length and unequal length shorties and this is what they got on the dyno.

Motorsport short-tube headers. We had expected more from the Flowmaster mufflers, so we felt that perhaps the
stock headers wre restricting exhaust up front. Figuring that the larger short-tube headers may open up the
restriction, the Steeda crew bolted on a set of Motorsport's unequal-length, short-tube headers, part number
M-9430-SSC. Surprisingly, we got nothing; in fact, with the 227.6 peak horsepower number, we actually lost a
fraction of a horsepower.

Hooker equal-length short-tube headers. After seeing such a small increase from the Motorsport short-tubes,
we really weren't expecting much more from the equal-lengths. We were right. The Dynojet showed a 1.1
horsepower improvement.

SHORT TUBES ARE A WASTE OF MONEY! GO WITH THE LONG TUBES!:hihi:

Built 302 with boost brothers single intercooled t67 turbo kit. 526.14rwhp and 496.00rwtq @6psi boost. Lost fuel @5500rpm. Tuned by George @ Akron HP. Serious changes as we speak....
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