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#Open DP with turn-down, safe to drive?

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 Post subject: Open DP with turn-down, safe to drive?
PostPosted: Tue Nov 29, 2016 5:36 pm 
First Gear
Joined: Sat May 11, 2013 3:33 pm
Posts: 66
hey guys,

So a bit of a dilemma: I'm in the middle of a 3" TBE install, currently have the catback section removed. Won't have a chance to complete it till I have more time over weekend, but would like to use the wagon during the week to run an errand.

Came up with a temporary solution, consisting of a 3" turn-down just after downpipe. Don't mind the sound, but would like to know if this is safe to do, as a temporary solution.

My hope is the turn-down will help avoid "burning the undercarriege" from what I've read up on WRX's running simply open DP. Maybe help a bit with directing fumes down and back too.

Bottom line, is this a safe n sound temporary solution? Or am I asking for more trouble than its worth. Appreciate any input.

Pic of the custom turn-down, not yet clamped down
Image

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'94 Legacy Turbo Touring Wagon; kyb gr2's/mostly stock
'05 Toyota Corolla XRS - 1.8L 2zz-ge, 6speeds of revtastic fury


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 Post subject: Re: Open DP with turn-down, safe to drive?
PostPosted: Tue Nov 29, 2016 6:27 pm 
Site Admin
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Joined: Tue Oct 15, 2002 11:37 am
Posts: 27111
Location: Houston, Tx
Yeah, that should be fine.

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Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm


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 Post subject: Re: Open DP with turn-down, safe to drive?
PostPosted: Tue Nov 29, 2016 7:19 pm 
Winestone Cowboy
Joined: Thu Mar 26, 2015 4:12 am
Posts: 325
Location: Lake Stevens WA
The de-cel sound cracking is awesome!

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94 Winestone SS 5MT Rob 550 20g. (Pickle)
Original WA car with 450k miles and climbing


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 Post subject: Re: Open DP with turn-down, safe to drive?
PostPosted: Tue Nov 29, 2016 8:51 pm 
First Gear
Joined: Sat May 11, 2013 3:33 pm
Posts: 66
Pntaste4evr99 wrote:
The de-cel sound cracking is awesome!


heh sweet, im looking forward to hearing that :-D so far only revved on stand, and loved it. wonder if de-cel sound will be different being auto, vs 5spd

And thanks Legacy777, feel better already having your blessing :P

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'94 Legacy Turbo Touring Wagon; kyb gr2's/mostly stock
'05 Toyota Corolla XRS - 1.8L 2zz-ge, 6speeds of revtastic fury


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 Post subject: Re: Open DP with turn-down, safe to drive?
PostPosted: Wed Nov 30, 2016 8:08 am 
Fourth Gear
Joined: Mon Aug 31, 2009 9:09 pm
Posts: 1204
Location: Rochester, WA
Loud, but not dangerous at all. I've ran open downpipe without a turndown for quite a while before.

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2005 Legacy GT Limited Wagon 5-Speed. Stock-ish ;)


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 Post subject: Re: Open DP with turn-down, safe to drive?
PostPosted: Wed Nov 30, 2016 10:59 pm 
First Gear
Joined: Sat May 11, 2013 3:33 pm
Posts: 66
Alphius wrote:
Loud, but not dangerous at all. I've ran open downpipe without a turndown for quite a while before.


maybe not for the car, but gawwdd dam my ears!! :oops: ssoooo loud :shock:

fully regret driving to work today, in lieu of a short neighborhood test drive.. apparently prolonged exposure to such loud noise can cause irreversible damage to ears. and they've been hurting all day so far. wonder if turndown only made it worse as far as sound, by bouncing it off ground instead of straight back.

found some earplugs for drive home, and fully plan to NOT drive again till either stock catback is on or the new TBE. power wise maybe slight gain at ~4k rpm, for small loss in torque down low. but aint worth it to run like this for unnecessary auditory complications :|

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'94 Legacy Turbo Touring Wagon; kyb gr2's/mostly stock
'05 Toyota Corolla XRS - 1.8L 2zz-ge, 6speeds of revtastic fury


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 Post subject: Re: Open DP with turn-down, safe to drive?
PostPosted: Wed Nov 30, 2016 11:25 pm 
Site Admin
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Joined: Tue Oct 15, 2002 11:37 am
Posts: 27111
Location: Houston, Tx
It must be pretty loud then.

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Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm


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 Post subject: Re: Open DP with turn-down, safe to drive?
PostPosted: Thu Dec 01, 2016 12:35 am 
Moderator
Moderator
Joined: Tue Aug 25, 2009 7:52 am
Posts: 4535
Location: Des Moines, Wa
Ha ha, I drove 15 or so miles like that with Alphius driving behind. In addition to being deafened myself, he said his truck's floorboards were vibrating with the noise lol.

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 Post subject: Re: Open DP with turn-down, safe to drive?
PostPosted: Thu Dec 01, 2016 2:59 am 
Fourth Gear
Joined: Mon Aug 31, 2009 9:09 pm
Posts: 1204
Location: Rochester, WA
I drove my swapped 99 for a couple days with an open catless bellmouth as well, it made my eyeballs vibrate.

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 Post subject: Re: Open DP with turn-down, safe to drive?
PostPosted: Thu Dec 01, 2016 6:00 am 
Winestone Cowboy
Joined: Thu Mar 26, 2015 4:12 am
Posts: 325
Location: Lake Stevens WA
They are loud and all, but there is nothing like open headers (or in this case open DP ) at WOT, it's music!

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94 Winestone SS 5MT Rob 550 20g. (Pickle)
Original WA car with 450k miles and climbing


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