Question on mid pipe with supercharger

spdfrkaby · May 15, 2006

Just got car dyno'd with P1SC. I have BBK full length headers, stock h-pipe and 2 chamber flowmasters. Question is, I need to upgrade my stock h-pipe for a BBK aftermarket mid pipe. Will an x-pipe or h-pipe give me more gains and should I get one with hi flow cats or no cats if emissions is not an issue? Also, would I need to get chip reburned if I opt for no cats and is it going to be too loud with no cats. Thanks.

lvmustanggt · May 16, 2006

how much rwhp did you pull ?

Stang|ess · May 16, 2006

an xpipe will yield a few more ponies, but go with whatever YOU think sounds better.

BigChiefSmokem · May 16, 2006

X pipe will give you a few more HP, like others have said. (BTW, how do you have the stock h pipe and long tubes?)

For your flowmasters I would go with an H pipe or prochamber. I'm not a big fan of the sound of an x pipe with flows.

jerry S · May 16, 2006

Have a look here.

http://www.mustang50magazine.com/techarticles/4376/index.html

In this article, on an emission controlled vehicle, a X pipe made only 3 hp and 3 ft lbs of torque more than an H-Pipe and that was at 5400 rpm. There were no gains below 5400 rpm. In fact, the H-Pipe made 1 or 2 hp more than the X until you got to 5400 rpm, at which point the X made a meager few hp more. In my view, an H is better than an X on an emissions controlled vehicle.

On a non-emissions controlled vehicle, however, the X-pipe made more hp than the H at every RPM level over 2200 rpm. I recently installed an X-pipe on my car, which was previously just a straight dual exhaust. I was really surprised at the difference before and after. In your case, you could pick up some ponies by installing an X. I know I sure did.

hognutz · May 16, 2006

I would run the dr. gas. I have read about the guys over at MPH picking up quite a bit of power on boosted car.

I mean 10hp+ sometimes 20 but that was at high hp levels.

they swear than the location of the crossover does not make the flows sound raspy. I am sure you can find some sound clips. the numbers I saw would make it a no brainer for me.

ohh and no kitty's IMO. then again I eat felonies for breakfeast. I put mustard on them and I eat them.

speedfreak98r · May 16, 2006

Ya, how did you get the stock H to fit full lengths?

Dope 97GT · May 16, 2006

I have stock headers with BBK o/r H and flows they sound real good but very loud one of the loudest setups i have heard. It almost makes the car meaner than it really is for a NPI car.

But I really like the BBk H and Flow setup I wouldnt change mine at all.

spdfrkaby · May 16, 2006

The exhaust was on the car when I bought it. They guy said it was a BBK h-pipe. The h-pipe has cats on them now and when I got the car dyno'd, the tuner said it looked like stockers. I have an 8 pound pulley on the charger and the boost guage was showing just shy of 11 pounds and he said it was because of the h-pipe with cats and if I put on a mac or prochamber I should pick up around 15 HP. I'm pretty sure it's an aftermarket H-pipe, is there any way to find out by the pipe. i.e. markings, etc?

ADRENLN · May 16, 2006

well if you are going to gain any power depends on if the car has the stock pipe already. you could take a pic and post it up here. we will be able to tell you if it is stock or aftermarket.

also the stock midpipe has 4 cat converters, the aftermarket ones have only 2. so go take a look.

LB0193 · May 16, 2006

You most likely I am 100 percent sure already have an aftermarket pipe with highflow cats...cause you cant be runing long tubes with the stock h-pipe

BigChiefSmokem · May 16, 2006

LB0193 said:
You most likely I am 100 percent sure already have an aftermarket pipe with highflow cats...cause you cant be runing long tubes with the stock h-pipe

Yup

If you want pick up a Dr Gas x pipe for long tubes, or a vrs off road x pipe for long tubes. You should notice a good increase in sound, but maybe not as much in the power dept, especially if you're already running an aftermarket pipe.

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