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02-28-2018
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#21 | |
 
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: Bright red 1990 zr-1
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H 
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
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02-28-2018
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#22 | |
 Join Date: Feb 2014
Location: AZ
Posts: 860
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Re: Bright red 1990 zr-1
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Toyo R888...they stick like glue when it's dry, but I wouldn't use them in the wet unless you really need to. |
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02-28-2018
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#23 |
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Join Date: Feb 2018
Location: Poland
Posts: 58
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Re: Bright red 1990 zr-1
"Prevents resonance. One of the reasons the 90’ systems are so restrictive"
Do you know what will happen if i cut it, will be loud, sound will be better or worst...? Last edited by tommy; 02-28-2018 at 04:36 PM. |
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02-28-2018
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#24 | |
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Join Date: Feb 2018
Location: Poland
Posts: 58
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Re: Bright red 1990 zr-1
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02-28-2018
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#25 | |
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Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: Bright red 1990 zr-1
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Here a write up from “Warpten” on this subject. Bob does a nice job explaining it. “This has been discussed over the years and relates to the construction of the muffler to reduce resonance. There should be several threads related to resonance that discuss this. One exhaust pipe goes into each muffler and two tailpipes come out, but only one actually flows exhaust straight out; the other is mostly cosmetic. If you cut one of your mufflers in half horizontally you would find that the rear two thirds of each muffler is a closed chamber with a 1 " or so diameter tube going into it. (Sometimes there is a small 1/2" dia. tube that goes through the chamber but doesn't connect with it to flow just a little bit a exhaust. Not sure why other than a bit more pressure relief). The chamber is called a Helmholtz resonator and it engineered to be a specific shape and volume to cancel out one of the two main natural frequencies that our engines generate that create the intense resonance or "droning" under light to moderate load at 1800 and 3400 rpms that you have heard many with certain aftermarket exhaust systems complain about. The exact shape and size allow for sound waves of a specific frequency to enter the chamber, bounce around and cancel each other out. The center resonator also has such a Helmholtz resonator for the 3400 rpm frequency of 230 Hz; the mufflers deal with the 1800 rpm one of 120 Hz. Sometime people drill out the dummy tailpipe thinking they will get better performance and a better sound. They are rewarded with the same performance and a loud droning at 1800 rpm. Bad idea. Corsa also uses Helmholtz resonators, and I suspect some newer ones of other makes now do too. Most of my research on this was done in the 90s; I am sure that several manufacturers hove found solutions to this problem. At the time, only the stock and Corsa systems tamed the resonance. Hope that helps--Bob”
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
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09-08-2018
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#26 |
Join Date: Feb 2012
Location: Canada
Posts: 69
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Re: Bright red 1990 zr-1
Hard to beat that Bright Red for a ZR-1 Tommy. Nice to see you take TLC with it. We both have the same vette. Congrats enjoy the ride.
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09-13-2018
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#27 | |
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Join Date: Feb 2018
Location: Poland
Posts: 58
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Re: Bright red 1990 zr-1
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09-13-2018
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#28 |
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Join Date: Feb 2018
Location: Poland
Posts: 58
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Re: Bright red 1990 zr-1
Last weekend i was in big cars meeting in Poland, below you can see video how looks zr1 after correction of paint
https://www.youtube.com/watch?v=kGLIKYtkN08&t |
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10-01-2018
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#29 | |
 
Join Date: Apr 2015
Location: Kentucky
Posts: 363
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Re: Bright red 1990 zr-1
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The Z and the paint & polish looks amazing!
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'94 ZR1 LT5 - Dark Red Metallic '79 L82 4-speeds of fun '96 LT1 Borla, H-pipe, TB, CAI (Sold) "An adventure is only an inconvenience rightly considered. An inconvenience is only an adventure wrongly considered." -- G.K. Chesterton |
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10-08-2018
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#30 | |
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Join Date: Feb 2018
Location: Poland
Posts: 58
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Re: Bright red 1990 zr-1
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