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Old 05-09-2002, 12:50 AM   #1
WR-REX
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Default PDE vs Turboxs downpipe

One has a 4 inch mouth that doesnt cover any of the turbo outlet. Bu the PDE does cover part of the turbo outlet. WHat does this do for performance?
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Old 05-09-2002, 12:58 AM   #2
STEALTH-WRX
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Default downpipe

i have the pde downpipe and i love it. all of my lag issues are gone. i had all stock exhaust piping and downpipe with a front mount and an upipe and i had lag. i got the downpipe and now i have so much less lag compared to before. i think they are equally good.
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Old 05-09-2002, 10:55 AM   #3
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hello
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Old 05-09-2002, 10:58 AM   #4
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Default Re: PDE vs Turboxs downpipe

*edit* nevermind.

Covering the wg outlet (which is what I'm assuming does) like the stromug one, causes turbulence when you reach full boost (and the wg opens). The stock one is the same way. There aren't any dyno's of before and after that I've seen, but I just decided to get the best (IMO). $330 isn't that bad at all.

Another option is the Godspeed one because it includes the midpipe, so it'd save you that cost, you'd get no cell, and get to keep your catback.

my $.02

-C
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Old 05-09-2002, 11:10 AM   #5
WR-REX
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it seems that PDE and godspeed are nearly identical. ANd both replace downpipe and front midpipe. and both block the wg.
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Old 05-09-2002, 11:17 AM   #6
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here is a picture of both godspeed and pde
Attached Images
File Type: jpg comparo.jpg (46.9 KB, 259 views)
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Old 05-09-2002, 11:37 AM   #7
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Quote:
Originally posted by WR-REX
it seems that PDE and godspeed are nearly identical. ANd both replace downpipe and front midpipe. and both block the wg.
It looks like hte GS one allows for the wg flow. You know the wg flapper doesn't open 90 DEG, so it will still go in there mostly. The stock DP is a big POS.
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Old 05-09-2002, 05:58 PM   #8
WR-REX
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what does that do for performance? blocking the wg I mean.
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Old 05-09-2002, 06:02 PM   #9
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Can someone say cross talk?
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Old 05-09-2002, 06:10 PM   #10
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Default turboxs vs. P.D.E.

It seems logical to me that less restriction in the downpipe would allow for better spoolup.I have the tbxs turbo back exhaust before (stock exhaust),boost reached 14 psi about 3500 rpm,now I reach 14 psi at about 3000 rpm.I am running stock ECU now.I am note sure if this answers your question,just wanted to give some feedback on the topic.
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Old 05-10-2002, 01:29 PM   #11
WR-REX
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Does blocking the wastegate hurt performance?
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Old 05-10-2002, 01:58 PM   #12
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Quote:
Originally posted by WR-REX
Does blocking the wastegate hurt performance?
It makes the exhaust gas flow turbulant. That doesn't help performance.

Do you have the latest SCC mag? It has their WRX that they put on a Vishno Stg 0 and put on a few different exhausts. One of the exhasut utilizes a downpipe like the PDE one that has a flat plate in the path of the WG.

Read that article and they talk about it causing boost spikes, etc.
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Old 05-10-2002, 03:15 PM   #13
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Just an addition. I machine out the flange at the portion over the wastegate arm. The wastegate opening is completely unblocked. I have had no spiking or creep issues with this setup at all despite my huge amounts of airflow.
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