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Thunderbird "Dual Exhaust" system
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fast Ed
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PostPosted: Sat Jan 10, 2009 7:05 pm    Post subject: Thunderbird "Dual Exhaust" system Reply with quote

Well, I tried using Thunderbird and exhaust together as search terms, got a bunch of hits. Looks like most of them were Bus related, didn't find anything related to my question specifically.

Anyway, just wondering if anyone here has tried this one from Thunderbird:

Image may have been reduced in size. Click image to view fullscreen.


I'd likely get the cheaper version that just has black painted pipes off the engine, with chrome mufflers. For the price, I don't expect the chrome to last forever, and I'm not looking for huge power. This is for my 73, with a stock engine, that might be getting a Megasquirt conversion and some other minor upgrades in the short term. Just wondering how this systems fits, if the full-flow oil filter is going to interfere (I've seen that mentioned on a few types of exhaust), and what the sound might be like ... don't want it too obnoxious. The fact that it comes out of the original muffler tip holes I find interesting.


thanks,
Ed N.
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Glenn Premium Member
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PostPosted: Sat Jan 10, 2009 7:14 pm    Post subject: Reply with quote

Those are for looks and not performance. Just about any 4 into 1 header with a single muffler will be better.

Blingity bling.
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Hotrodvw
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PostPosted: Sat Jan 10, 2009 8:04 pm    Post subject: Reply with quote

Wow.....who dreamed that one up? I bet it sounds obnoxious too.
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k29349@yahoo
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PostPosted: Sat Jan 10, 2009 8:14 pm    Post subject: Reply with quote

I had one of those on a 40 horse way back in the day. They sound good! Not loud, but real deep and melow. The fit and chrome was good also, or at least it used to be.
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cal63look
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PostPosted: Sun Jan 11, 2009 2:20 am    Post subject: Reply with quote

Here's a video i made a while back, Just what your looking for Smile


Link
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fast Ed
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PostPosted: Mon Jan 12, 2009 7:08 am    Post subject: Reply with quote

Thanks for the info, everyone. I realize that other styles of exhaust will make more power, for now it's just sound and appearance that I'm after. Laughing


thx,
Ed N.
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The Noof
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PostPosted: Mon Jan 12, 2009 7:23 am    Post subject: Reply with quote

Makes a VW sound like a Subaru...
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gonebuggy
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PostPosted: Mon Jan 12, 2009 9:07 am    Post subject: Reply with quote

The Noof wrote:
Makes a VW sound like a Subaru...


That's a good thing isn't it? I thought you loved Subarus bro? Laughing
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The Noof
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PostPosted: Mon Jan 12, 2009 9:11 am    Post subject: Reply with quote

gonebuggy wrote:
The Noof wrote:
Makes a VW sound like a Subaru...


That's a good thing isn't it? I thought you loved Subarus bro? Laughing

As much as I love Barium enemas...
Remember...Subaru backwards spells' U R A BUS
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gonebuggy
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PostPosted: Mon Jan 12, 2009 9:12 am    Post subject: Reply with quote

fast Ed Canuck wrote:
Thanks for the info, everyone. I realize that other styles of exhaust will make more power, for now it's just sound and appearance that I'm after. Laughing


thx,
Ed N.


If it fits your bill then go for it. I've got a decent shape "GT 4 tip" that sounds very good on a stocker. You can have for FREE if you want it.

Looks like this: http://www.cip1.ca/PhotoGallery.asp?ProductCode=ACC%2DD%2D2070

Let me know,

Alex
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gonebuggy
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PostPosted: Mon Jan 12, 2009 9:16 am    Post subject: Reply with quote

The Noof wrote:
gonebuggy wrote:
The Noof wrote:
Makes a VW sound like a Subaru...


That's a good thing isn't it? I thought you loved Subarus bro? Laughing

As much as I love Barium enemas...
Remember...Subaru backwards spells' U R A BUS


ahahaha, and who doesn't like those!
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pudlo
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PostPosted: Mon Jan 12, 2009 11:09 am    Post subject: exhaust Reply with quote

J.C. Whitney sells them.
They have them with and without chrome.
They've sold the same set for over 30 years now.[/img]
Not a good pic, but this is what I have on my Invader GT.
It does sound good to me.
Image may have been reduced in size. Click image to view fullscreen.
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Scott Novak
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PostPosted: Mon Jan 12, 2009 11:23 am    Post subject: Reply with quote

That exhaust probably won't work any better than dual cannons. It is still connected to cylinders firing in adjacent order just like the dual cannons.

I really wonder why people design stupid crap like this.

When I hear people talking about how great some exhaust sounds I wanna puke. If you have a noisy exhaust you can't hear what your engine is really doing. I'd much rather have an efficient free flowing quiet exhaust so I can hear the valve train and any possible detonation.

I can understand that someone might want the most efficient exhaust system possible and that it might be a bit noisier.

But to install an exhaust system for some bling factor that is noisy and DOESN'T give the best possible performance is moronic in my book.

Scott Novak
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fast Ed
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PostPosted: Tue Jan 13, 2009 8:16 am    Post subject: Reply with quote

Guys that have these exhausts installed, do you have a full-flow oil filter? If not, do you think it would clear OK?


thx,
Ed N.
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climer97007
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PostPosted: Wed Aug 31, 2016 10:45 pm    Post subject: Reply with quote

Scott Novak wrote:
That exhaust probably won't work any better than dual cannons. It is still connected to cylinders firing in adjacent order just like the dual cannons. I really wonder why people design stupid crap like this."
Scott Novak


Scott,
Actually these headers are not as bad you seem to think. The VW firing order is 1243. In this case 1&4 and 2&3 are tied together with equal length pairs. That means the pairs are 360 degrees out of phases with each other. While 4 into 1 headers are best, these are second best, and better than the dual cannon headers which actually do run adjacent cylinders into a pair, which would produce good scavenging on two cylinders, and bad on the other two, which ought to change the compression ratios because of the scavenging variation. Anyway, these might work well with two really small turbos for a twin turbo system, which is why I am considering them.
Thanks,
Gene
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modok
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PostPosted: Wed Aug 31, 2016 11:09 pm    Post subject: Re: Thunderbird "Dual Exhaust" system Reply with quote

Hello there Gene.
Currently I have taken over for scott as resident smart alec, it is my job to point out small errors.

The firing order is 4321, and so, it actually is the same as dual cannons Shocked

To pair the cylinders that fire 360 apart, it is 1-3 and 2-4

also, Jacobs ignition systems are better than sex.
(joke for mr. novac)
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