Turbo Question
Thread Starter
Race Director
Joined: Mar 2004
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From: Fort Wayne IN
2025 C5 of the Year Finalist - Modified
C5 of Year Finalist (performance mods) 2019
2017 C5 of the Year Finalist
2016 C5 of the Year Finalist
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Turbo Question
Ok to run without a down pipe/wastegate pipe attached??? I'm troubleshooting my vibrations and it's a pain to work around the APS kit. I've taken the down pipes/wastegate pipes off the car, and was planning on doing a short run with some idle revs to check for a vibration, nothing more. Is this going to cause any problems or issues by running with the backsides of the turbo's open like that?
Thread Starter
Race Director
Joined: Mar 2004
Posts: 12,466
Likes: 886
From: Fort Wayne IN
2025 C5 of the Year Finalist - Modified
C5 of Year Finalist (performance mods) 2019
2017 C5 of the Year Finalist
2016 C5 of the Year Finalist
2015 C5 of the Year Finalist
This is only going to be about a 30 second run. Start it, let it catch idle, throw a couple of revs to 2000-2500 RPM, kill it. Just checking for the cyclical vibration I'm chasing down.
Thread Starter
Race Director
Joined: Mar 2004
Posts: 12,466
Likes: 886
From: Fort Wayne IN
2025 C5 of the Year Finalist - Modified
C5 of Year Finalist (performance mods) 2019
2017 C5 of the Year Finalist
2016 C5 of the Year Finalist
2015 C5 of the Year Finalist
The exhaust will be hitting the waffle styled aluminum heat shielding. SHould be ok. Just a PITA to redrop the manifolds to put the DP's back on to test run for 30 seconds before pulling it all apart again.
Good news is at least I dind't have to undo any of the oil/coolant feed lines to do this.
Good news is at least I dind't have to undo any of the oil/coolant feed lines to do this.
Race Director
Joined: Dec 1999
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From: Alexandria, Virginia, USA VA
it will be fine, you can always clamp a clothes dryer pipe on there if you want to divert the exh. unless you are dynoing the car, no worries
exh does get pretty hot under load!!
exh does get pretty hot under load!!
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Thread Starter
Race Director
Joined: Mar 2004
Posts: 12,466
Likes: 886
From: Fort Wayne IN
2025 C5 of the Year Finalist - Modified
C5 of Year Finalist (performance mods) 2019
2017 C5 of the Year Finalist
2016 C5 of the Year Finalist
2015 C5 of the Year Finalist
Because the tubes that divert to the wastegates are wide open, so in theory it shouldn't make any boost at all. Besides, I'm not looking to load up the motor, just start it and throw a couple of revs at it to see if the vibration is still present as I remove items one at a time.