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Old 03-13-2010, 02:12 PM   #1
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Default 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.
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Old 03-13-2010, 02:20 PM   #2
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Those welds look a little... lacking? It's no wonder they cracked.
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Old 03-13-2010, 02:21 PM   #3
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Thats not cool. Nice pics though.
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Old 03-13-2010, 02:24 PM   #4
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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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Old 03-13-2010, 02:24 PM   #5
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You would know...mine just started doing the same crap yesterday.

Mine's 14yrs old though.
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Old 03-13-2010, 04:02 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.
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Old 03-13-2010, 10:45 PM   #7
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Quote:
Originally Posted by arbinshire View Post
Those welds look a little... lacking? It's no wonder they cracked.
they weld the complete circumference on the inside of the pipe. only spots between the bolt holes on the outside.

Mine has seen two track days and 4 years of street use without any issues...
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Old 03-13-2010, 10:58 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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Old 03-13-2010, 11:03 PM   #9
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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.
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Old 03-13-2010, 11:17 PM   #10
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wow who hasnt had a problem with begi? im glad the cs pipe on my egt doesnt have issues like that....
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Old 03-13-2010, 11:21 PM   #11
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Quote:
Originally Posted by rweatherford View Post
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. :(
I'll agree. Welds look ok, exhaust went bbuuuzzzz and cracked it. It would have happened even if the pipe was fully welded on the outside.

Harmonics suck.
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Old 03-17-2010, 08:27 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
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Old 03-17-2010, 08:40 PM   #13
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Quote:
Originally Posted by Corky Bell View Post
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
How can anyone complain about BEGi w/ customer service like this?
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Old 03-17-2010, 08:43 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.
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Old 03-17-2010, 09:47 PM   #15
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Quote:
Originally Posted by Corky Bell View Post
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
Sweet. Who pays for shipping to and from?

If any of my downpipes crack I'll have them send the pipes to you for a free fix that way I don't have to do it hehe
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Old 03-17-2010, 11:01 PM   #16
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lol
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Old 03-17-2010, 11:17 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.

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File Type: jpg timing.JPG (49.2 KB, 328 views)
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Old 03-18-2010, 08:31 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.
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Old 03-18-2010, 09:47 AM   #19
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You heard the man, send it in and have it fixed!
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Old 03-18-2010, 12:37 PM   #20
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He said he can't because he has already paid for track days and doesn't have time to send it in.
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