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Old 10-28-2012, 09:28 PM   #1
GreenL
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Default Shorty Downpipe question.

Looking at a shorty downpipe that was used on a GD wrx. Looking to use it on my Legacy GT and mate it to the stock 3rd car and stock cat back.

Should be good to go correct?

Also anyone notice a reduced time in lag with a divorced shorty?
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Old 10-28-2012, 11:20 PM   #2
HinshawWRX
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Details?
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Old 10-28-2012, 11:44 PM   #3
freddy121389
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what are you trying to do, if youre trying to go stage 2 then dont use a shorty its still way too restrictive to go stage 2
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Old 10-28-2012, 11:51 PM   #4
GreenL
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Its a stromung divorced shorty and i would use my stock midpipe with 3rd cat.

Restrictive how? Thete is no cat.
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Old 10-29-2012, 12:08 AM   #5
leggy15
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Because I know the regular aftermarket dp have a cat down the line. But using a shorty without a cat will probably be the same but not as smooth as a full dp or full exhaust. Just put it in and log to see what its making. Are you open source or ap?
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Old 10-29-2012, 12:27 AM   #6
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Quote:
Originally Posted by GreenL View Post
Looking at a shorty downpipe that was used on a GD wrx. Looking to use it on my Legacy GT and mate it to the stock 3rd car and stock cat back.

Should be good to go correct?

Also anyone notice a reduced time in lag with a divorced shorty?
no such possibility

it MAY increase transient throttle response
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Old 10-29-2012, 12:28 AM   #7
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Quote:
Originally Posted by GreenL View Post
Its a stromung divorced shorty and i would use my stock midpipe with 3rd cat.

Restrictive how? Thete is no cat.
and if there is ANY cat in the system...it wont matter what dp ya use
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Old 10-29-2012, 12:51 AM   #8
GreenL
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Ok so the shorty is ok to use on the LGT correct? They person had it on a GD.
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Old 10-29-2012, 01:25 AM   #9
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Quote:
Originally Posted by GreenL View Post
Ok so the shorty is ok to use on the LGT correct? They person had it on a GD.
go try it and get back to us
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Old 10-29-2012, 10:32 AM   #10
GreenL
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Quote:
Originally Posted by Uncle Scotty View Post
go try it and get back to us
I am assuming that is a yes lol
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Old 10-29-2012, 01:29 PM   #11
Dirtrace95
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Default shorty down pipe

Quote:
Originally Posted by GreenL View Post
Ok so the shorty is ok to use on the LGT correct? They person had it on a GD.
I have used a shorty down pipe on my LGT, It works just fine. When you
have to work around smog inspections its the way to go. The inspectors
around here just stick a big mirror under the car to see if the cat is there.
They dont look at the down pipe cat. The short down pipe does improve spool
time and you will notice some extra giddy up. You should tune for it though.
The improvement in performance will not be the same as a full length down
pipe. You are still running through an OEM cat down the line.
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Old 10-29-2012, 01:32 PM   #12
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I had the maddad shorty on my 09 wrx. Definitely stage 2 like performance with faster spool and stronger tq. I recommend. :-)
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Old 10-29-2012, 01:44 PM   #13
GreenL
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Sounds good guys thanks.
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Old 10-29-2012, 02:11 PM   #14
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Quote:
Originally Posted by moonrider_99 View Post
I had the maddad shorty on my 09 wrx. Definitely stage 2 like performance with faster spool and stronger tq. I recommend. :-)
No way are you getting faster spool from a shorty pipe vs a regular full length dp.
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Old 10-29-2012, 03:52 PM   #15
moonrider_99
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Quote:
Originally Posted by ecbmxer View Post
No way are you getting faster spool from a shorty pipe vs a regular full length dp.
Where did I say that? My statement is that the shorty is a big improvement over stage 1 spool and tq delivery. The major restriction with the OEM unit is how the air flow is directed from the turbo into the exhaust and the completely blocked wastegate. The shorty removes those restrictions. Is a shorty going to give the same numbers as a full catted DP? probably not but I doubt anyone can feel the difference driving around, you would have to dyno the car as the differences are minimal. And a non-catted full DP is prone to boost creep on the 2.5L so it's not really a good comparison since the engine is running out of its efficiency range.

I'm so tired of people arguing over things just because they read a few posts somewhere and now they want to show that they can argue about something and derail a topic.

Shorty is a good alternative and a cheap way to get to stage 2 without having to swap it out for inspections, etc.
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Old 10-29-2012, 07:56 PM   #16
Uncle Scotty
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Quote:
Originally Posted by ecbmxer View Post
No way are you getting faster spool from a shorty pipe vs a regular full length dp.


like you would even know why there are different dp designs anyway

which you dont....im sure


but there are reasons and id bet that you really dont kow anything at all about exhaust design

really

it would take hours and hours to try to 'splain ya what is what here.....this IS complicated
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Old 10-29-2012, 09:40 PM   #17
young_skywalker
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Quote:
Originally Posted by moonrider_99 View Post
I had the maddad shorty on my 09 wrx. Definitely stage 2 like performance with faster spool and stronger tq. I recommend. :-)
I've got one on my 08 with a COBB AP Stage II map. I've been happy with it as well.
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Old 10-29-2012, 09:54 PM   #18
Uncle Scotty
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ive had a coated one on my 06 since 06......
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