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Back in a backdraft: Sidepipe questions
Hi All
I't been a few years but I'm finally back in a backdraft, took delivery last week. Car runs great and happy with it so far, but noticed the sidepipes chatter / rattle a lot more than i remember. The "chatter" is nonexistent when accelerating, but when I lay off the gas and the car is in gear around 2K-3K rpm the side pipes rattle pretty good. Has backdraft changed anything with the side pipes in the past 2 years? |
Hi had mine for about a year mine don't do that May be the baffles r loose u may have to get with other bd owners check out pipe holders check if split cut outs around pipes
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Side pipes
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Yes, pipes are new supplier and design for about 2 years.
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ok thanks for the replies. I figure if something was loose it would chatter/rattle all the time, this seems to only happen laying off the gas while in gear. and it's pretty loud
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What engine?
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Hi Jay
It's a 427 Smeding Cobra dart block Dynod at ~585hp at the crank. I don't think there is anything broken in the side pipe but if there was say a broken weld in there, would removing the side pipe and shaking it reveal anything? Thx PS Sorry for the multiple IDs, I couldn't log on with this ID for some reason so I had to create a new one. Now it seems to be working again :) |
Holy crap no wonder the pipes r rattling 585 hp
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That's a Smeding 585... but in regards to your question a loose baffle you can hear simply by moving the pipe with your foot. Often it's actually the heatshield that is loose and/or has a broken stud.
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Thanks Jay, so it's the big power causing the chattering pipes. Only happens during engine braking above 3K rpm though, never in neutral or under acceleration.
I moved the pipes with my foot as you described and even tapped the mufflers with a rubber mallet and they sound uniform throughout, nothing noticeably loose or rattling about. Heat shields are secure, won't budge when I try to turn them. So I wonder if there's a better way to secure the side pipes than the rubber grommet or if I should consider upgrading the pipes to something that can better handle the ponies. Appreciate feedback from folks on these options |
Sounds more like a lean backfire.
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side pipe rattling
Mine also rattles when I am going slow. It probably rattles all the time, you just can not hear it going at some speed. I was told that the baffle is a straight through fiberglass pipe with holes in it. It sits in the side pipe loose. That the rattle is normal. I really do not know for sure.
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BDR 1340 does the same thing. and I have taken the rubber mallet to them as well. It is not the 585 hp, because I have the 5.0 Coyote. It looks to me like back pressure, when you watch the pipe with the door open. All I know is its annoying. I talked with Jay on changing the mufflers out. If that noise is normal I don't want normal:) Jay and Brian will figure it out you can be sure of that.
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Please post an update if a fix emerges. |
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In any case the only way to stop the can-of-bolts at slow speed is to go into neutral. |
The best suggestion I can give you is to send your side exhausts to Stainless Steel Specialties in TN. I talked with them and was given a price of $600.00 to remove the mufflers and replace them. I think this will resolve the rattle in the pipes. Much has to do with quality. I sent the pipes to them. Much to my surprise they came back is one screwed up mess. Never again will I go this route. They were totally trashed. I purchased a new set from Jay.
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Have you done this successfully? And what if the pipes are ceramic coated? Thanks |
I wonder if you could jam a fiberglass wedge between the baffle and the metal
pipe to stop the rattle ? Just an idea. |
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