Do Upgraded Turbos Require Catless Race Exhausts? - Page 3 - 6SpeedOnline

Sep 10, 2010 | 07:49 PM

#31

TT Gasman

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Quote:

Originally Posted by Mike@AwdMotorsports

Can you elaborate on why?? its more helpful for the members to know the reasoning..

Mike

For one thing it's illegal to run catless on the street.

Sep 10, 2010 | 08:01 PM

#32

ruf_turbo

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Quote:

Originally Posted by AlexM

Actually, that's exactly why I started this thread. I have spent a lot of time and money trying to find the perfect exhaust for 997tt and I would like to keep its sound and tone the way it is now. It's that good. So, I am looking to get reassurance that Europipe can breathe freely enough to handle larger snails. I am actually willing to sacrifice "some" performance just to keep the current setup... at this point I am trying to figure out what that "some" is.

The EP system is so efficient with EXTREMELY low back pressure and 100 cel cats that probably the only system to better that would be straight pipes...and you probably won't want to live with that.

AWD is going to do some 65mm VTG's for me in a couple of weeks and I run the EP L2 system. I wouldn't consider changing it to MAYBE gain a few horsepower. The car will be strong enough for the street and I'm not looking to put it on the dragstrip or get into a PBox speed pissing contest.

Sep 10, 2010 | 08:06 PM

#33

ruf_turbo

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Quote:

Originally Posted by TT Gasman

For one thing it's illegal to run catless on the street.

Aw heck, what's one more illegal thing to add to our list.

Sep 11, 2010 | 12:13 AM

#34

k_ddsl

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Quote:

Originally Posted by TT Gasman

For one thing it's illegal to run catless on the street.

Quote:

Originally Posted by ruf_turbo

Aw heck, what's one more illegal thing to add to our list.

Hear-yea, hear-yea:
All those wanting to run cat-less legally, move on over to Kuwait

Chris, on a serious note though:
If we alter an EP exhaust by removing the EP cats and adding EP cat bypass pipes if Stef were to make such a thing, and if the turbos installed in the car required such flow, then what would be the problem with doing that?

I would not want to run straight pipes either. I would gladly rather sacrifice a bit of power as opposed to sacrificing my hearing/sanity!

Sep 11, 2010 | 11:16 AM

#35

TTdude

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For a recent similar discussion, click here and view Stephen Kaspar's exhaust shootout. It compares different exhausts including straightpipes. Interpretation of these results vary. Imo, unless your going for absolute top end performance where the flow is greatest, you've got a great exhaust and no reason to change for your typical usage.