bottlenecking?

Drake69

Enjoyin' mah ride...
Aug 24, 2009
648
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Richmond, Virginia, United States
Poodles;1501653 said:
It's VERY noticable as I did this exact thing. Stock DP was broken by a shitty shop (long story) so I got a DDP with stock(ish) catback. When I went to a high flow cat and 3" catback it made a HUGE difference.

+1 on that. I also ditched the cats in the back of mine and it made it even more powerful. Just make sure you know someone that can pass your inspection through w/o yelling about missing environmental equipment (IF you cut the cats off!!!).

It literally woke my turbo up. It wasn't really sluggish before, but now it's like driving a whole new car. :evil2:
 

slopra

Formerly tsavenged
Jan 15, 2010
284
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San Antonio, TX
sorry just a real quick question
i dont know much about turbos, im getting a 7mgte motor and swappin it soon
so im just curious, ignoring how loud it is and how illegal it is, will running open downpipe give you more performance or is it better to have a free flowing 3" exhaust all the way back?
 

Poodles

I play with fire
Jul 22, 2006
16,757
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Fort Worth, TX
Drake69;1501832 said:
+1 on that. I also ditched the cats in the back of mine and it made it even more powerful. Just make sure you know someone that can pass your inspection through w/o yelling about missing environmental equipment (IF you cut the cats off!!!).

It literally woke my turbo up. It wasn't really sluggish before, but now it's like driving a whole new car. :evil2:

I've always said, there are only 2 reasons not to run a cat:
- You run leaded race gas
- You're a cheap ass

High flow cats have been dyno proven to be within a couple HP of not running them. Keep in mind that's within the resolution of the dyno so more than likely there isn't a difference.

They clean up the air at no power cost, so they're not a bad thing by any means.

tsavenged;1501849 said:
sorry just a real quick question
i dont know much about turbos, im getting a 7mgte motor and swappin it soon
so im just curious, ignoring how loud it is and how illegal it is, will running open downpipe give you more performance or is it better to have a free flowing 3" exhaust all the way back?

Open downpipe sounds like crap, attracts cops, and you run the risk of lighting the rubberized undercoating on fire. Not to mention the exhaust getting into the cabin.

I dunno, my car felt about the same with and without my 3" exhaust so I'd definately run the exhaust (and do).