DIY Exhaust Mod – Gain of 10+ HP!!!

[Eric G]

Your post makes me laugh! This was run with diagnostics on board more then just seat of the pants calculations. Make fun if you will, but simple physics don't lie, when you allow an normally aspirated engine breath easier (to a point) you will see improvement.

The difference between the energy content of the fuel consumed and the useful power extracted from the engine is known as Thermal Efficiency (TE), this is just one factor that aides in the increase of this.

While Porsche develops "performance" factors into their cars, those factors are also dictated by standards of operation as a commercial vehicle that must meet country standards where sold. Performance is not always at the forefront of those factors. The stock muffler and exhaust systems are not designed for maximum performance...if they were, you would see them run on on the track.

What we do to the cars is all about what you are looking for and what you can extract from them to get to that point. This mod is just one of those, you can either think outside the box, stay with stock or buy someones idea...but in the end it is what make you the owner the happiest. For me, I am very happy with the end results.

[gilmanco]

Why ghetto up your car just spend money on a real exhaust with proven HP gain?

[fredpayne]

Originally Posted by gilmanco

Why ghetto up your car just spend money on a real exhaust with proven HP gain?

I did, after I lost my drill bit in the muffler, I bought a set of Borlas

[MN 986]

Originally Posted by fredpayne

I did, after I lost my drill bit in the muffler, I bought a set of Borlas

I know how you feel. I almost lost my step drill bit also, so I would recommend caution when drilling (maybe don't have the drill go all the way in to the muffler/stop short of the last step).
I did this mod a few years ago and thought it was worth doing for a little more sound, mostly at idle. The added sound may have been a contributing factor in me wanting even more sound, and I eventually bought a FVD 'sound version' muffler and this year I am adding 'Che' secondary bypass pipes.
Think of the crios mod as a 'gateway' exhaust mod!

[fredpayne]

Originally Posted by MN 986

I know how you feel. I almost lost my step drill bit also, so I would recommend caution when drilling (maybe don't have the drill go all the way in to the muffler/stop short of the last step).
I did this mod a few years ago and thought it was worth doing for a little more sound, mostly at idle. The added sound may have been a contributing factor in me wanting even more sound, and I eventually bought a FVD 'sound version' muffler and this year I am adding 'Che' secondary bypass pipes.
Think of the crios mod as a 'gateway' exhaust mod!

I just wish I could get my drill bit our of the muffler, then I could sell them to a friend of mine, any ideas on how to do that?

[MN 986]

Originally Posted by fredpayne

I just wish I could get my drill bit our of the muffler, then I could sell them to a friend of mine, any ideas on how to do that?

Since it sounds like the muffler is off the car, you could probably cut a larger hole in the center section of the muffler (maybe on top/less visible) to get it out, then patch that hole. Page 1 of this post shows the inside view of the muffler, and I would guess that it is stuck in the middle section with no way to get it to other sections or out of the muffler without cutting it open.
Hopefully your (and almost my) misfortune can help others learn to be extra cautious with running the step drills all the way through the hole.
How do you like the Borla? I have read where some people say it is a little too loud, but these engines sound so good, that is hard to imagine.

[fredpayne]

Originally Posted by MN 986

Since it sounds like the muffler is off the car, you could probably cut a larger hole in the center section of the muffler (maybe on top/less visible) to get it out, then patch that hole. Page 1 of this post shows the inside view of the muffler, and I would guess that it is stuck in the middle section with no way to get it to other sections or out of the muffler without cutting it open.
Hopefully your (and almost my) misfortune can help others learn to be extra cautious with running the step drills all the way through the hole.
How do you like the Borla? I have read where some people say it is a little too loud, but these engines sound so good, that is hard to imagine.

I will probabaly get a cutting torch and do just that and then weld the piece back on, I tried some Billy Boats, now those were loud, too loud, a terrible drone in the car, couldn't even carry on a conversation, I got the Borla Sport Catback exhaust, not the fancy ones and I love them, perfect. It was Borla Part# 140115

[Crono0001]

Well, after driving around like this for a few weeks, I must say:

Wow, the sound is incredibly noticeable. Especially when you're driving down the street. It's a world of difference. Not too much of that loud ricer gurgle, but just enough of that throaty dark growl.

And no, I don't feel like the car has gotten any slower.