05-26-2014 | #111 |
Join Date: Feb 2011
Location: San Marcos CA
Posts: 1,802
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Re: Headers Installation...
^^^ don't worry, it will melt the required clearance after a few drives (or you could trim it)- but yeah- headers touch that.
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05-26-2014 | #112 |
Join Date: Sep 2010
Location: Currituck, NC
Posts: 246
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Re: Headers Installation...
Ours is that close and our headers have no heat protection at all. After 5K miles it shows NO signs of melting whatsoever!
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05-26-2014 | #113 | |
Join Date: Dec 2012
Location: NC
Posts: 1,786
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Re: Headers Installation...
Quote:
Road test light hammer, everyone is happy here. Finish fenderwells, and then start on
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I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG] |
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05-27-2014 | #114 |
Join Date: Dec 2012
Location: Ponoka, Alberta, Canada
Posts: 158
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Re: Headers Installation...
Shrade, with the detail you have put into your car, you will have no problem. You are doing a Great job. Your Car will be awesome.
Keep up the good work with the Photo's
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91 ZR-1 Arctic White/Gray 01 C-5 Magnetic Red/Black 85 FJ 1100 (Big Bore kit, Hooligan Bike) 05 FJR 1300 Yamaha (Long Distance, Sport Touring) And a whole whack of RC Planes |
08-18-2014 | #115 |
Join Date: Dec 2012
Location: NC
Posts: 1,786
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Re: Headers Installation...
So we're addressing 'drone' / resonance here - sound that's at or below 20 Hz.
3/16" styro-foam board added to the painted top headliner DID reduce interior drone, over a glass top. I noted this after making a recording of interior sound in the car, and then playing it in a media player on the computer, with a graphic equalizer. Reduction was marginal. Sheet cork placed under the rear cargo area carpet reduced drone even more, but still not enough. So now, it's more header wrap on the pipes. Everything from the X-section back, dropped, and another roll + 2/3 of wrap. X-section, + 2 aft X-section pieces done. Harmonics I KNOW will be altered with this wrap, as tightly as it's on here... And rear-most sections wrapped:
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I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG] Last edited by Schrade; 09-24-2014 at 12:44 PM. |
08-18-2014 | #116 |
Join Date: Dec 2012
Location: NC
Posts: 1,786
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Re: Headers Installation...
If I reversed the X section, and the aft 2 sections, how would that effect flow dynamics?
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I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG] |
08-19-2014 | #117 |
Join Date: Apr 2007
Location: Lake Bluff, IL
Posts: 2,072
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Re: Headers Installation...
Hi Schrade--I see you have a Power Effects exhaust. That was one of several I tried when I was testing exhaust systems in the mid to late 90s. Wrote a couple of articles on exhausts. I loved the sound and the fit and finish of the Power Effects but it has the most horrible resonance of all the systems I tested and there is no real solution to it short of fabricating Helmholtz resonators for it.
As I noted in another exhaust post today in general discussions, when I had my PE system on I had an acoustical engineer from Outboard Marine take the car for a day and test it. He instrumented it, provided graphs of the frequencies throughout the rev range, including the big spikes at 1800 and 3400 rpms, and calculations for the proper sized Helmholtz resonators for each of the two offending frequencies. (Those are what the stock and Corsa systems use to quell resonance). At the time I was in fairly constant communication with the guy who owned Power Effects. I liked the PE system so much otherwise I wanted to help him solve the resonance problem so I sent him all the info I got on how to incorporate the resonators and eliminate the problem. Unfortunately he was primarily a designer and had then just agreed to sell his company so he did not want to make any changes. To this day they sell the same system I tested back in the late 90s. I no longer seem to have the info on the resonance but I believe Jim Voter and Marc Haibeck may still have copies of the graphs and resonator calculations. As has been noted before, after all my testing of systems I ended up with Corsa for the better part of 15 years on two cars due to lack of resonance and max power, until I finally went back to stock with cutouts.--Bob
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2016 Long Beach Red Z06 #10281 "POPS Z" 1995 Polo Green #409 "WARP TEN"--Haibeck 350/510 package, 4.10s, Hurst, Stock Exhaust with QTP Cutouts --Sold but still running strong 1993 Quasar Blue #161 "HIL KING" --Sold but still running strong, now with more than 120,000 miles 1967 Marlboro Maroon/Saddle Corvette Coupe 300 hp/4-spd --Sold a long time ago ZR-1 Net Registry Founding Member #95 NCM Lifetime Member Favorite Quote--Attributed to Mickey Thompson: "Too Much Horsepower is Almost Enough" Last edited by WARP TEN; 08-19-2014 at 05:02 PM. |
08-19-2014 | #118 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,698
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Re: Headers Installation...
PE system always struck me as something a bit overthought and pretty heavy especially in the rear.
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX Last edited by XfireZ51; 08-19-2014 at 08:55 PM. |
08-19-2014 | #119 | |
Join Date: Dec 2012
Location: NC
Posts: 1,786
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Re: Headers Installation...
EXCELLENT INFO MR B. PERFECTLY ANSWERS MY QUESTION ABOUT DRONE. KUDOS TO YOU SIR!
Even tho' there's not really a solution, short of buying more hardware - we'll see if any drone reduction can be had with additional wrap, and additional interior sound-damping material, such as Dyno-Mat, or something comparable here. So think twice Kevin.................. Quote:
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I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG] |
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08-20-2014 | #120 |
Join Date: Feb 2014
Location: AZ
Posts: 860
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Re: Headers Installation...
Since this is turning into more of an exhaust thread than a header thread, vis-a-vis the drone issue, I just gotta say: Corsa is unreal! Confirmed on my first highway drive today. ZERO drone at any RPM with a system that's basically straight pipes. Amazing, amazing system.
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