Tell me if I'm an idiot for thinking this...
#21
pretty much been covered, but I ran open dump on IWG like this before. Other than boost control/creep issue, it ran absolutely fine. There was a divider plate welded into the turbine housing, and there were absolutely no leaks from wastegate side to turbine flow side... I suspect that is your issue as well. I also ran no gasket from turbo to DP, again to ensure there was zero crossflow between the two areas.
Anyways, sounds like you're on the right path to troubleshooting this. FYI it was obnoxiously loud and I got tired of quickly. When I went EWG, i had it rerouted back into the exhaust. lol
Anyways, sounds like you're on the right path to troubleshooting this. FYI it was obnoxiously loud and I got tired of quickly. When I went EWG, i had it rerouted back into the exhaust. lol
#22
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Did you ever run the same IWG turbo with the wastegate tube routed into the DP?
Id be curious if the creep would be better or worse with the VTA setup.
At one point I was going to go VTA in hopes of helping decrease creep because I figured that the wastegate flow was being inhibited by the backpressure in the exhaust.
Id be curious if the creep would be better or worse with the VTA setup.
At one point I was going to go VTA in hopes of helping decrease creep because I figured that the wastegate flow was being inhibited by the backpressure in the exhaust.
#24
That's an interesting vacuum generator...
I've been troubleshooting pneumatic circuits all day and trust me you've made a vacuum generator (just like others have said).
The fast high volume exhaust creates a vacuum (low pressure area) in the dump pipe as it passes the venturi (inlet to the down pipe). This has a small orifice connecting it to the dump pipe which causes a syphoning action of the air in the dump into the exhaust resulting in crazy AFR's.
Seal the wastegate port or put the pipe back the way it was.
I've been troubleshooting pneumatic circuits all day and trust me you've made a vacuum generator (just like others have said).
The fast high volume exhaust creates a vacuum (low pressure area) in the dump pipe as it passes the venturi (inlet to the down pipe). This has a small orifice connecting it to the dump pipe which causes a syphoning action of the air in the dump into the exhaust resulting in crazy AFR's.
Seal the wastegate port or put the pipe back the way it was.
#25
Did you ever run the same IWG turbo with the wastegate tube routed into the DP?
Id be curious if the creep would be better or worse with the VTA setup.
At one point I was going to go VTA in hopes of helping decrease creep because I figured that the wastegate flow was being inhibited by the backpressure in the exhaust.
Id be curious if the creep would be better or worse with the VTA setup.
At one point I was going to go VTA in hopes of helping decrease creep because I figured that the wastegate flow was being inhibited by the backpressure in the exhaust.
#27
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Got the downpipe re-welded back to being recirculated. Also fixed some other things and sealed everything up tight. Car is still idling a little bit weird and running lean in boost. Better and smoother than it was though. Not sure exactly what I'm going to do. Probably look at the fuel pressure under boost and see if I'm getting enough fuel.
Anyways, this was at the top of the downpipe to divide the two, not sure how much it helped, but it looks pretty good.
Anyways, this was at the top of the downpipe to divide the two, not sure how much it helped, but it looks pretty good.
#30
I bought a used BEGI downpipe that someone did this mod to. Ran it like that for a few months and tuned the car like that. I got fed up of the sound. It really sounded ----. It sounded like a blowing exhaust all the time, and not like a cool EWG screamer pipe. I eventually had it flipped round and plumbed back into the DP. Lost a bit of spool, but it sounded so much better.
For what it's worth, I experienced no issues after I reintroduced it into the main DP. I think your problem is unrelated.
For what it's worth, I experienced no issues after I reintroduced it into the main DP. I think your problem is unrelated.
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