very cool mike.. post some sound clips!

 

Thanks - it does sound pretty special

 

From you, of course. Chad led the way with the custom, big bore Europipe exhaust a few years ago. And thanks to your reccommending "Forced Induction Performance Tuning", I was able to discover that I needed this new beast!

 

Where as the EP2 is lighter than stock, the Bazooka is same as stock.

 

Will do. I think I have a means.

 

Thanks Mark. Now my car at least sounds as nasty as your car!

 

Thanks. I believe they were considering bringing it on as a reguliar production model, but were too busy to fit it in.

 

Ahh i see, cool man! Well congrats, i would love to hear it

 

I know what you're saying Craig. But if you think about it, the narrow diameter of the stock tail-pipe, which Stef indicates is used in the "Open pipe - no cat - stock tailpipe: 422 cfm" measurement, is a definate restriction. My exhaust has dual tips out of the canister (70mm & 76mm), not to mention a fat 84mm pipe between the Cats & Cans.

My primary objective with this exhaust was to have a system that would not be restrictive, based on the guidelines in A.G. Bells Book, "Forced induction Performance Tuning" for the HP targets I have in mind for my car. I believe the book lays out some fairly sound principals in exhaust design, in relation to HP generated.

In regards to exhaust tubing size, it says that engines between 3.5L & 4.0L developing 200 to 250 HP/L with a dual exhaust, piping s/b between 82mm & 95mm. For a 3.6L engine, this would indicate an exhaust that would be appropriate for 720hp-900hp range. As my Cat/Can pipe is 84mm, I believe this system to be able to easily handle a true 700+ HP without any problem with restriction.

I believe the stock exhaust, straight pipe, only has a 60mm primary tubing. This would be a restriction.

 

Thanks Ken! How are you liking your newest mod? Isn't it a beast!

 

Uhhh, I don't think so DDog. Not these guys. Why would they? They don't even want to sell you 1!

 

I will try and get somthing figured out. Not sure how it's going to reproduce, but I'm going to give it a shot. Now all I need are some nice wheels to go with the AMLS sound of my car... Hmmmmm

 

Craig,

My guess is they are comparing stock 60 mm open pipes versus the much larger diameter Europipe exhaust.

Furthermore, I can tell you from experience .................. If Steff @ Europepipe says it is so, then it is so. You can take it to the bank. There is no BS at Europipe.

The only question I would ask is are these numbers from Steff.

 

The diameter of the piping is only one of three potential points of restriction on a 996TT exhaust. The other two potential restrictions are the muffler and the cats. Therefore, you can increase the pipe diameter ad infinitum, but if the muffler and/or cats are restrictive, the exhaust system as a whole will be restrictive. In other words, an exhaust is as restrictive as its most restrictive component.

Europipe’s “Bazooka” addresses the pipe diameter restriction admirably. However, it retains chamber mufflers. As you are undoubtedly aware, chamber mufflers attenuate sound by reflecting the exhaust stream back and forth against angled walls within the muffler body, thereby slowing down the exhaust flow considerably. Thus, chamber mufflers are very restrictive.

In contrast, an "open pipe - no cat - stock tailpipe” exhaust has no muffler whatsoever. There is no muffler less restrictive than no muffler.

Europipe’s “Bazooka” also uses 100 cell cats, which are far less restrictive than 400 cell OEM cats. However, an "open pipe - no cat - stock tailpipe” exhaust has no cats whatsoever. Once again, there is no cat less restrictive than no cat.

The only flow advantage that Europipe’s Bazooka has over an "open pipe - no cat - stock tailpipe” exhaust lies in the pipe diameter. While Europipe’s larger diameter piping undoubtedly flows considerably better than OEM 60 mm piping, it surprises me that this advantage overcomes the restrictive chamber muffler and 100 cell cats to such an extent that, according to the posted stats, the Europipe flows 40% better than an "open pipe - no cat - stock tailpipe.” I obviously have no empirical data to dispute the posted stats. Nevertheless, the results do not make sense to my novice mind.

Craig

 

what craig said

i'm not an expert either, but i don't see how larger diameter piping with cats and mufflers will outflow a wide open exhaust. especially with as short a run as the TT exhaust is. even 100 cell cats are very restrictive. never mind the chambered exhaust. even if you tripled the piping diameter, you'd still be bottle necking at the mufflers and cats.

unless of course they carried the oversized piping through the muffler chambers which would explain the dimensions of the mufflers.....this may overcome the flow lost through the muffler chambers. however, you'd still have air trying to crash through the cats.

it'd be interesting to see some before and after dyno runs on a few different cars.