Running noise
#2293456
04/24/17 09:23 PM
04/24/17 09:23 PM
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Joined: Sep 2015
Posts: 1,096 Australia
ozymaxwedge
OP
super stock
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OP
super stock
Joined: Sep 2015
Posts: 1,096
Australia
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Hey guys, I have a 71 Barracuda street car that is loud, Im OK with the thump thump out the pipes it's the engine running/valve train noise it makes. It has always been like it, you really notice it when along side other cars or a wall, last week I had the shaker off for paint repairs and the extra noise coming from out the hood made me think there was something wrong internally. It is a 12-1 solid roller 528 RB, lash is around 20thou, mice custom extractors with 4" X pipe and Aero's. I have a tunnel ram but most of the time it has a 1050 dominator on it, unfortunately I dont have space for a air filter so I guess there is some noise out the carb as well . Today I am going to pull the slip collectors off, clean and add some copper sealant, see if that helps part of it. Would love it to shut up a little. Any tip's ?
cheers
Last edited by ozymaxwedge; 04/24/17 10:16 PM.
1963 Plymouth Max Wedge 1971 Barracuda
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Re: Running noise
[Re: Sxrxrnr]
#2293568
04/24/17 11:55 PM
04/24/17 11:55 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Is it possible that what you are hearing is valve train noise which too had concerned me on my 512 stroker? Which I believe is inherent to these engines.
I in my mind had finally attributed it to the so called almost tin can like material turkey pan that serves to cover the lifter chamber and acts as a speaker that amplifies and broadcasts the typical cam lifter racket. Whereas other engines such as Chevys, with their cast iron or heavy aluminum manifolds tend to muffle this racket and keeps it contained.
If thats the case... for a test.. fill the intake valley full of that carpet jute.. its great sound deadner.. a bit heavy but who cares.. this is a test
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Re: Running noise
[Re: ozymaxwedge]
#2293645
04/25/17 02:35 AM
04/25/17 02:35 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I run a INDY valley lid not the thin pan so maybe not. Myself..if I had a B/RB engine I would try packing the jute in there.. its a simple test and you can pull it out easy.. but thats me.. your complaining about noise.. try it and see
Last edited by MR_P_BODY; 04/25/17 02:37 AM.
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Re: Running noise
[Re: ozymaxwedge]
#2293871
04/25/17 02:41 PM
04/25/17 02:41 PM
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Joined: May 2008
Posts: 1,131 Thigh-Gap Junction
@#$%&*!
New user name, Same old jerk!
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New user name, Same old jerk!
Joined: May 2008
Posts: 1,131
Thigh-Gap Junction
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Hey guys, I have a 71 Barracuda street car that is loud, Im OK with the thump thump out the pipes it's the engine running/valve train noise it makes. ... A stethoscope can help to identify individual noise sources. You can use them with the solid rod on solid surfaces or an open hose to probe areas around the engine. This is why I only run headers on race-type applications, they transmit noise from every valve closing and cylinder firing. In the past I've wondered what thicker header tubes would sound like under the hood. It might be worth it even if they double the weight. Try tightening the lash.
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Re: Running noise
[Re: ozymaxwedge]
#2293935
04/25/17 04:09 PM
04/25/17 04:09 PM
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Joined: Jan 2003
Posts: 13,385 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,385
Marion, South Carolina [><]
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Solid roller...they make a racket.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Running noise
[Re: humpty]
#2294175
04/25/17 11:18 PM
04/25/17 11:18 PM
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Joined: Sep 2015
Posts: 1,096 Australia
ozymaxwedge
OP
super stock
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OP
super stock
Joined: Sep 2015
Posts: 1,096
Australia
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What type of oil are you running? Mine gets significantly louder when I run synthetic. Maybe dump some zinc in to see if it quiets down. I do not run Synthetic oil. I run Penrite 20/50 mineral, has lots of zinc.
1963 Plymouth Max Wedge 1971 Barracuda
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Re: Running noise
[Re: ozymaxwedge]
#2294177
04/25/17 11:20 PM
04/25/17 11:20 PM
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Joined: Sep 2015
Posts: 1,096 Australia
ozymaxwedge
OP
super stock
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OP
super stock
Joined: Sep 2015
Posts: 1,096
Australia
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Think I will seal the collectors up better and close lash up a touch. Thanks guys.
1963 Plymouth Max Wedge 1971 Barracuda
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