Register or Log In To remove these advertisements. |
|
|
|
Thread Tools | Display Modes |
03-20-2021, 06:59 PM | #26 |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,714
|
Re: DIY exhaust resonance cancellation
Glad the Noico worked for you. I was very happy with the product and pricing compared to most of the other choices.
__________________
44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
09-08-2021, 05:45 PM | #27 |
Senior Member
Join Date: Dec 2014
Location: Edmonton Alberta
Posts: 1,304
|
Re: DIY exhaust resonance cancellation
I have installed my new 355 in a 1981 Chevrolet SWB, very happy with the engine itself but the new exhaust that has been installed has a consistent and very loud drone that occurs at 2000RPM, and again around 2500RPM. This drone has made the truck more or less undriveable. The muffler shop cannot figure it out, they have tried as of today four different brand name mufflers and cannot eliminate the issue.
Truck has brand new stainless exhaust coming off of 2.5 inch ram horns manifolds, going through a crossover and into dual mufflers (four different ones so far, like I said) then goes over rear axle and dumps at 45 degree angle. Dumps do not seem to be the issue since it drones even up in the air on the hoist. Going to try the J pipe route, looking at that spreadsheet now.
__________________
DAVE Edmonton, Alberta 1959 Apache 1967 K20 1968 C20 1970 C10 1972 GMC 2500 1981 C10 |
09-08-2021, 06:02 PM | #28 |
Registered User
Join Date: Feb 2013
Location: central California
Posts: 2,730
|
Re: DIY exhaust resonance cancellation
Good to see my old thread back from the archives. Post an update when you get those j-pipes done. It seems resonance is a common problem and alway seems to come it at the speed/rpm we most commonly drive. I did pretty much get mine killed....finally.
|
09-08-2021, 06:18 PM | #29 | |
Registered User
Join Date: Feb 2013
Location: central California
Posts: 2,730
|
Re: DIY exhaust resonance cancellation
Quote:
Last edited by AcampoDave; 09-08-2021 at 06:33 PM. |
|
Bookmarks |
Thread Tools | |
Display Modes | |
|
|