begi-s downpipe track aftermath
03-13-2010, 01:12 PM
#1
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begi-s downpipe track aftermath
After my last track day I started hearing the usual exhaust leak noises on accel and startup except this time it wasn't my turbo falling off the manifold:
DSC_1791.jpg?t=1268503675
DSC_1790.jpg?t=1268503694
DSC_1796.jpg?t=1268503710
DSC_1800.jpg?t=1268503731
So I road my bicycle over to the local exhaust shop only to find out they closed down. :(
photo.jpg?t=1268503769
Google maps found me another exhaust shop within bicycling distance from my apartment and that's where pipe is at now. I'm estimating another 2-3 track days on this setup before it goes up for sale.
DSC_1791.jpg?t=1268503675
DSC_1790.jpg?t=1268503694
DSC_1796.jpg?t=1268503710
DSC_1800.jpg?t=1268503731
So I road my bicycle over to the local exhaust shop only to find out they closed down. :(
photo.jpg?t=1268503769
Google maps found me another exhaust shop within bicycling distance from my apartment and that's where pipe is at now. I'm estimating another 2-3 track days on this setup before it goes up for sale.
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03-13-2010, 01:24 PM
#4
I agree they look just a little low on the heat and then the weld didnt completely fuse with the tube, makes sense because when welding thick to thin you focus the majority of the heat on the flange. You also could try to get a welder to do it, i might trust a welder over a muffler shop. And your going to need to get it resurfaced flat again too after warping from welding.
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03-13-2010, 03:02 PM
#6
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My begi dp did the same thing after a month of street use and two track days.
IMG_0340-1.jpg
IMG_0341.jpg
Then i went to v-bands and haven't turned back yet, or put a wrench to my hot side parts after install.
IMG_0340-1.jpg
IMG_0341.jpg
Then i went to v-bands and haven't turned back yet, or put a wrench to my hot side parts after install.
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03-13-2010, 09:58 PM
#8
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Looks like the welds were fine, the pipe cracked. Could they have been welded all the way around the outside, yes. Would that have prevented this failure, unlikely. Vibration and thin wall pipe FTL. :(
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03-13-2010, 10:03 PM
#9
Mine happened right after I installed the new exhaust. Must have put more pressure on it in the wrong direction, and there's only one flex joint, where the cat would be.
Old exhaust was almost all flexible tubing, so put very little stress on the old downpipe. Am going to re-weld it with a brace on it.
Old exhaust was almost all flexible tubing, so put very little stress on the old downpipe. Am going to re-weld it with a brace on it.
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03-17-2010, 07:27 PM
#12
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Hey guys, are those cracked pipes mild steel or stainless? The first one looks like roasted mild.
Please check your ignition retard amount.
Any cracked dnpipe sent back to me gets fixed, NC, as long as there are no hammer marks.
Corky
Please check your ignition retard amount.
Any cracked dnpipe sent back to me gets fixed, NC, as long as there are no hammer marks.
Corky
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03-17-2010, 07:43 PM
#14
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Mine in the first set of pics is mild. I think my timing is pretty solid. I can post a MSQ later this evening if anyone cares to look at it.
I would have called BEGi up, but there a few track days coming up that are already paid for and it needed to be fixed as quick as possible.
I would have called BEGi up, but there a few track days coming up that are already paid for and it needed to be fixed as quick as possible.
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hehe
03-17-2010, 10:17 PM
#17
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Here's my 97 gt2554r timing map. With the holes plugged in the downpipe it wants more fuel and after I take care of that this weekend I'm going to see if it can take some more timing around 200 kpa.
Also, before my thread gets locked I just wanted to say that I posted it purely for informational purposes and nothing else. I would never have guessed the downpipe had issues at the flange, but I happened to be installing new nuts at the time and spotted it. It is what it is.
Also, before my thread gets locked I just wanted to say that I posted it purely for informational purposes and nothing else. I would never have guessed the downpipe had issues at the flange, but I happened to be installing new nuts at the time and spotted it. It is what it is.
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03-18-2010, 07:31 AM
#18
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why would your thread get locked?
Map is about 4-6° retarded compared to mine in boost. I don't think mine's very aggressive but I also don't think it would be so much as to increase the EGTs dramatically.
Map is about 4-6° retarded compared to mine in boost. I don't think mine's very aggressive but I also don't think it would be so much as to increase the EGTs dramatically.
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