[2000Mustang]

I know that adding 2.5 inch exhaust will cause you to lose low end power. But if you added a mid-pipe, and a little restrictive mufflers, wouldnt that help you get some of that low end back? I think that an X would add a bit more restriction than an H, but im sure that either would add some restriction. Im thinking that crush bent tubing and a bit restrictive muffler (40 series) might but you back around the same low end power. Am I completly wrong in thinking this?

[Onemanzu]

why don't you just go with 2.25's and mendral bent tubes??

or get a tune and a screamin demon

[2000Mustang]

...I have 2.25. Im asking because my headers exit 2.5. Im gonna eventually go to 2.5 all the way back. And I already have a Scremin' Demon.

[Onemanzu]

why are you looking at 2.5 if you already have aftermarket exhaust and everything?? just stay with what you got unless you are making a big change...

[2000Mustang]

Its just that I recently got the headers on, and right now the tubing is really messed up. One side is 2.5 back to the muffler, the other is 2.5 only about a foot past the converter. Im also wanting some different tips. Im sure im gonna make the change sometime, im just looking for ways to compensate for the low end loss.

[Onemanzu]

a super charger?? , under drive pullies will help a bit with the loss

[2000Mustang]

Im staying n/a. Ive got enough mods at this point that the u/d pullies might do the majority of the compesating.

[El_Cangri]

sorry for thread jacking but... can some1 link me to the screaming deamon.. i dont want to make a thread just asking that

and really really sorry for the thread jacking i dont like to thread jack

[2000Mustang]

Yea, its under the plug wires....thats if you've already installed one...

[ESG-642T]

Originally Posted by 2000Mustang ...I have 2.25. Im asking because my headers exit 2.5. Im gonna eventually go to 2.5 all the way back. And I already have a Scremin' Demon.

Waste-O-Money ....


Don't do 2.5 unless your going supercharged, or 4.2L n/a

[2000Mustang]

Scremin' Demon...$80
MSD wires...$60
NGK plugs...$20

adds up to a nice kick in the pants

big ass body kit.... pointless

[ESG-642T]

Originally Posted by 2000Mustang Scremin' Demon...$80 MSD wires...$60 NGK plugs...$20 adds up to a nice kick in the pants big ass body kit.... pointless

Too bad Screamin Demon = does nothing
MSD wires = i cant ever hate on msd!
Nkg plugs = your not running nitrous or a s/c or a turbo? not needed

[tomzac]

Originally Posted by 2000Mustang I know that adding 2.5 inch exhaust will cause you to lose low end power. But if you added a mid-pipe, and a little restrictive mufflers, wouldnt that help you get some of that low end back? I think that an X would add a bit more restriction than an H, but im sure that either would add some restriction. Im thinking that crush bent tubing and a bit restrictive muffler (40 series) might but you back around the same low end power. Am I completly wrong in thinking this?

With too large of an exhaust you lose torque because of two things. 1. Your exhaust gas takes longer to reach atmosphere, where in the process it has more time to become cooler and more dense. This adds the reknown back pressure, or more rightly called, resistance. 2. Larger piping reduces the velocity of the gases traveling through the system. As velocity increases, forces increases exponentially (not linear). Combined with the cam's valve lobe overlap, the exiting gases help to draw air intake. So you lose that benefit.

[ESG-642T]

Originally Posted by tomzac Originally Posted by 2000Mustang I know that adding 2.5 inch exhaust will cause you to lose low end power. But if you added a mid-pipe, and a little restrictive mufflers, wouldnt that help you get some of that low end back? I think that an X would add a bit more restriction than an H, but im sure that either would add some restriction. Im thinking that crush bent tubing and a bit restrictive muffler (40 series) might but you back around the same low end power. Am I completly wrong in thinking this? With too large of an exhaust you lose torque because of two things. 1. Your exhaust gas takes longer to reach atmosphere, where in the process it has more time to become cooler and more dense. This adds the reknown back pressure, or more rightly called, resistance. 2. Larger piping reduces the velocity of the gases traveling through the system. As velocity increases, forces increases exponetally (not linear). Combined with the cam's valve lobe overlap, the exiting gases help to draw air intake. So you lose that benefit.

^ Listen to this guy hes the mad genius, he just lurks around threads and pops up out of nowhere

[2000Mustang]

SSS, im just dicking with you. Not trying to argue. I, personally dont think its a bad mod though. tomzac, I understand now.

[ESG-642T]

Originally Posted by 2000Mustang SSS, im just dicking with you. Not trying to argue. I, personally dont think its a bad mod though. tomzac, I understand now.

This is from another forum regarding the SD

"It's mainly advertizing 'hype'. ALL coil manufacturers are faced with the same design parameters, they just embellish the obvious (which works like a charm from what I can see ) Just for laughs lets go through their selling points...

-10% to 15% more energy. Since coils are 'passive' devices (they don't add power to the circuit themselves), in order to supply an increase in energy they must draw that increase from the driver circuits (namely the DIS module). You should ask yourself if you 'need' that power increase because our DIS modules are already running very hard as it is.

-High temperature epoxy resin/increased thermal conductivity. They ALL use this (they have to). However, it would be remiss for the advertizers not to include this as a selling point.

-Advanced bobbin technology/highly specialized silicone magnetic steel cores. Again, ALL coil manufacturers use high silicone steel cores. This is done to optimize the cores for the design frequency and to minimize losses due to eddy currents and hysteresis. This knowledge is not new either... magnetic core technology has been well researched for the last 100 years. Again, it would be remiss for the advertizers not to include this as another selling point.

-Optimized winding, resistance and turns ratio. ALL manufacturers 'optimize' the design parameters of their coils. That is to say, they examine what the primary drive circuit load requirements are and what the output power requirements are and finalize their winding specifications based on that. Once again, advertizers are stating the obvious here. Transformer technology is not new and has also been well researched for the last 100 years.

Bottom line: you're reading an advertisement, not an impartial assessment of a product."

And matthewneuharth also said quote "don't waste your money"

[tomzac]

Originally Posted by SSStang ^ Listen to this guy hes the mad genius, he just lurks around threads and pops up out of nowhere

Sorry. I was the only one at my college majoring in graphics art and design taking calculus and physics (pre-engineering) as electives.

[ESG-642T]

Originally Posted by tomzac Originally Posted by SSStang ^ Listen to this guy hes the mad genius, he just lurks around threads and pops up out of nowhere Sorry. I was the only one at my college majoring in graphics art and design taking calculus and physics (pre-engineering) as electives.

I got out of taking calculus! took in in 12th grade and tested out of it .... IT major ftw!

Do you have aim? I need to speak with you.

[whitemustang02]

how much are the losses in the low end with a full 2 1/2 in exast from the headers back
im runing a na 3.8 L

[Onemanzu]

its noticeable lets say that... its kinda like ... adding 20 inch wheels noticable ... you will feel a difference from what it was