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Re: 440 HP Exhaust manifolds vs. Headers... [Re: DaytonaTurbo] #64453
05/28/08 11:28 AM
05/28/08 11:28 AM
Joined: Apr 2005
Posts: 15,134
Kelowna, B.C. Canada
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DPelletier Offline
I Live Here
DPelletier  Offline
I Live Here
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Joined: Apr 2005
Posts: 15,134
Kelowna, B.C. Canada
Quote:

Headers will always make more hp and torq. How much depends on the rest of the combo. Now you can make a lot of power with manifolds and go quick down the 1/4 with them, however if you're wanting to get everything possible out of your combo(and not willing to pay stupid high $ for OEM hp manifolds) chances are you'll have headers on there.





....Which brings us back to the point I made earlier. Which is better? It depends what you are looking for.

- Do headers make more power than HP manifolds? Yes

- How much more power will I make with headers? Impossible to say without full specs. Will vary depending on the build.

- Can I make 500hp using HP manifolds. Yes


If you are on a budget and want the most HP for the least $$$'s, then use headers. If you are building a race car, use headers. If you want a strong street car and want it to look stock or don't want some of the alleged hassles of headers then you CAN get boatloads of power out of the HP manifolds as Andy has so clearly demonstrated.


Dave


1970 Super Bee 440 Six Pack 1974 'Cuda 2008 Ram 3500 Diesel 2006 Ram 3500 Diesel 2004.5 Ram 2500 Diesel 2003 Ram 3500 Diesel 2006 Durango Limited [url] http://1970superbee.piczo.com [/url]
Re: 440 HP Exhaust manifolds vs. Headers... [Re: DPelletier] #64454
05/28/08 04:00 PM
05/28/08 04:00 PM
Joined: Jan 2003
Posts: 27,421
Balt. Md
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383man Offline
Too Many Posts
383man  Offline
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Posts: 27,421
Balt. Md
I myself have always had good luck with headers. I have had the same headers on my sons Dart since we put it on the road in 1997 and it has never had a leak and they still look good. The same goes for my 63 but its only been on the road for almost 2 years.
But like was said it just depends on what you want. I like headers because I have to build cheap combo's and I need the hp headers gives me. But if someone can get the 500 hp or whatever they wany with manifolds then they wont need headers if they are happy without them.
I was thinking about getting the Max Wedge manifolds as to me they look like they might flow as well as headers. But they cost way more then my Headman's and the cast iron manifolds are much heavier. And any drag racer knows weight slows you down. Ron

Re: 440 HP Exhaust manifolds vs. Headers... [Re: plyrr69] #64455
05/28/08 04:47 PM
05/28/08 04:47 PM
Joined: Jul 2004
Posts: 115
Tampa Bay
BadFishy Offline
member
BadFishy  Offline
member

Joined: Jul 2004
Posts: 115
Tampa Bay
I sold my set of rusty pitted manifolds on eBay to some guy in Sweden for obscene money IMO, but he just had to have them. Then I bought a set of the repro manifolds for my 440 Cuda from Year One. They fit perfect and look brand new. The only difference I could find was a "Y1" cast in the back side and you can't see it when mounted. They have other castings for that original too. I have had them on for about 2 1/2 years now and they are just beginning to surface rust, so I pulling tham at the end of the show season and will have them ceramic coated cast iron grey for about $150. I could do a permanent coating myself, but for that money, why?! I am sure you would like them as much as I do, and I believe there is a Year One code floating around that is good for 20% off, which would bring the price down below $300. I know I could have bought used somewhere, but I like the fact that 1)new 2)no pits 3)no cracks 4)no looking through swap meets, and 5) comes with all the hardware, etc. I did remove the heat riser and sold that on eBay too! What a country! See the pic.

4457812-PB190151a.JPG (1090 downloads)

1971 Cuda, 440 custom-build
Re: 440 HP Exhaust manifolds vs. Headers... [Re: BadFishy] #64456
05/30/08 02:45 AM
05/30/08 02:45 AM
Joined: Sep 2006
Posts: 164
CH
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plyrr69 Offline OP
member
plyrr69  Offline OP
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Joined: Sep 2006
Posts: 164
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for me its defenetly clear, i want much HP and no Headers, because i like the understatement!!!

But if my car is slow machine after that.... hmmmm, i maybe dont like it! i thin it should go up something in between 11 and 12's with slicks...

what kind of setup you would run?

tx

Dave


___________________________ .......plymouth tells it like it is...!
Re: 440 HP Exhaust manifolds vs. Headers... [Re: plyrr69] #64457
05/30/08 06:25 AM
05/30/08 06:25 AM
Joined: Sep 2005
Posts: 580
North Carolina, USA
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Silverbullet2 Offline
mopar
Silverbullet2  Offline
mopar
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Joined: Sep 2005
Posts: 580
North Carolina, USA
It's always been my theory if you're running a full exhaust, by the time it gets all the way down the head pipes, through the mufflers, over the axle and out the tailpipes it doesn't know whether you had headers or not.

Race car with open or no exhaust system, I'm sure headers are worth some hp, and have the scavenging effect to boot. I still hate to look under the hood of a nice mopar and see a bunch of crappy aftermarket parts.

Re: 440 HP Exhaust manifolds vs. Headers... [Re: AndyF] #64458
05/30/08 10:47 AM
05/30/08 10:47 AM
Joined: Jan 2003
Posts: 3,329
Melbourne, FL
dwbiggs Offline
super gas
dwbiggs  Offline
super gas

Joined: Jan 2003
Posts: 3,329
Melbourne, FL
Quote:

The low deck 470 in my B body car was a fairly inexpensive motor to build. Unported Edelbrock heads, Performer RPM intake, Eddy 800 cfm carb, Mopar Perf .528 solid cam, etc.





475 to wheels...nice. How does this cam compare to the one in my sig below. Sounds like the solid is at least as tame...but seems like it would make more HP.

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