Re: Approximate price for custom Headers
[Re: Sammy]
#2572770
11/01/18 09:52 PM
11/01/18 09:52 PM
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Joined: Feb 2005
Posts: 20,272 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,272
PA.
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I think the guy that did mine charged 1000.00 plus parts but its been awhile. I had them coated in Ohio. Untitled by John Cadamore, on Flickr
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.38@138.67
Livin and lovin life one day at a time
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Re: Approximate price for custom Headers
[Re: Sammy]
#2572789
11/01/18 10:24 PM
11/01/18 10:24 PM
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Joined: Feb 2004
Posts: 35,047 S.E. South Dakota !
bigdad
Still Posting A Lot
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Still Posting A Lot
Joined: Feb 2004
Posts: 35,047
S.E. South Dakota !
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Locally
stainless $3500-$4000
mild steel , coated -- $1800-$2500
The lips of fools bring them strife, and their mouths invite a beating.Proverbs 18:6
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Re: Approximate price for custom Headers
[Re: Sammy]
#2572809
11/01/18 11:20 PM
11/01/18 11:20 PM
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Joined: Nov 2009
Posts: 3,082 St. Paul , Mn.
tubtar
master
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master
Joined: Nov 2009
Posts: 3,082
St. Paul , Mn.
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You can try to do it yourself. It is an exercise in frustration , but at the end of the day I got dang near equal length tubes ( + - 1/2 " ) that are a couple inches longer than ideal. I invented new combinations in swear words......I knew them all , but the sequence I used them got a real work out. And since it is plumbed through an X pipe and mufflers , the perfect header would be a moot point. Flanges from SPD , 1 7/8 " tube kit from Stahl , collector from Stahl......I had around 600.00 in parts and it took all of 40 hours. But they work pretty O.K. ...........long straight from port to first bend , one tube outside frame rail on each side , but no turning interference. I should add , I ditched the torsion bars , and probably wouldn't even have tried it if they were in place.
Last edited by tubtar; 11/01/18 11:21 PM.
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Re: Approximate price for custom Headers
[Re: Sammy]
#2572824
11/01/18 11:38 PM
11/01/18 11:38 PM
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Joined: Jan 2003
Posts: 20,328 Park Forest, IL
slantzilla
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 20,328
Park Forest, IL
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The 6 into 1 step header on my Valiant was $1100 15 years ago.
"Everybody funny, now you funny too."
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Re: Approximate price for custom Headers
[Re: Sammy]
#2572924
11/02/18 09:24 AM
11/02/18 09:24 AM
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Joined: Mar 2006
Posts: 1,229 In The Hills
jughed
pro stock
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pro stock
Joined: Mar 2006
Posts: 1,229
In The Hills
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Had a set made 10 years ago. Stainless 2 1/4", 4" collectors.. $1700. Still in use, no rust yet . Only regret was not using thicker flanges...although there have never been any leak issues.
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Re: Approximate price for custom Headers
[Re: Sammy]
#2572925
11/02/18 09:27 AM
11/02/18 09:27 AM
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Joined: Jan 2003
Posts: 4,203 Shelby Twp. Mi
HardcoreB
master
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master
Joined: Jan 2003
Posts: 4,203
Shelby Twp. Mi
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Looking to see what a set of custom headers in MILD STEEL would be with removable merge collectors? ..................................................................................
Can a pair of mild steel flanges be welded to Stainless Steel pipe?
yes
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Re: Approximate price for custom Headers
[Re: Sammy]
#2572954
11/02/18 11:35 AM
11/02/18 11:35 AM
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Joined: Jan 2005
Posts: 4,525 Michigan
MarkZ
Worthy
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Worthy
Joined: Jan 2005
Posts: 4,525
Michigan
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I spent $1400 on a set of mid-length headers for my car. 1 7/8" stainless primary tubes, mild steel flanges.
1987 Fifth Avenue - 512/518/D60
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Re: Approximate price for custom Headers
[Re: Sammy]
#2573086
11/02/18 04:09 PM
11/02/18 04:09 PM
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Joined: Oct 2007
Posts: 4,219 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,219
New York
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And how would you know whether what you get produces the most power, widest range, tunes to your cam, etc? You don't. Exactly equal length is always best? No. Since no one has mentioned it, the "formulas" for calculating that exact-down-to-1-mm primary length invariably ends with: "then make it 3-6" longer, and shorten by testing". What's actually going on inside the primaries (and much, much worse in the collector) is many waves of pressure in both directions, plus gas traveling at different speeds... in both directions. There is actual reverse gas flow back into the port at 8,000 RPM. The best length will change (how much? who knows) even with a rocker ratio swap.
Want to know more about the math? Get an engineering degree, then pay Gordon Blair $2,000.
If you can: make the primaries parallel to the ground (or very slightly up) and leave room in a straight line going back so you can add/subtract length as needed.
Boffin Emeritus
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Re: Approximate price for custom Headers
[Re: polyspheric]
#2573122
11/02/18 05:33 PM
11/02/18 05:33 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Just a little Friday-afternoon rambling on my part... Unless you've built a fairly common combination, or have enough testing on your particular combination to know what works, the "correct" header dimensions are subject to a number of variables. Where does the OP fit into this range? I don't recall him having said much at all about it. Also, from what I've read (no personal experience at this point), if you take any sorted-out header w/ a given primary diameter, primary length & standard collector design, and do nothing but switch to a properly designed merge collector, the only thing that may result is that the engine runs "differently", not necessarily better or worse. I've gotten the impression that a merge collector can require changes to the other dimensions of the header, too, in order to optimize the package for the collector. Is it 5:00 PM EST, yet?
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Re: Approximate price for custom Headers
[Re: polyspheric]
#2573127
11/02/18 05:50 PM
11/02/18 05:50 PM
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Joined: Dec 2005
Posts: 12,289 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 12,289
Fulton County, PA
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And how would you know whether what you get produces the most power, widest range, tunes to your cam, etc? You don't. Well, I would build them, not buy, but you're still correct. I can make guesses based on common sense, and available information and design programs. A person would need an accumulated knowledge based on years of experience, trial and error, dyno work and on track testing, to achieve the last little bit of benefit out of their particular combination. Most people aren't at that level - Pro Stock, Comp, even high end Super Stock - and headers have to be a series of compromises They have to fit, be able to get on and off the car, and not cost a million bucks. And most people won't replace or modify them for every tuning change. Building headers isn't that hard. Getting the correct tube dimensions into the space available and around all the stuff in the way, and keeping them reasonably close to equal length with the collector where it needs to be, is the trick
Last edited by CMcAllister; 11/02/18 05:54 PM.
If the results don't match the theory, change the theory.
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Re: Approximate price for custom Headers
[Re: CMcAllister]
#2573142
11/02/18 06:23 PM
11/02/18 06:23 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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And how would you know whether what you get produces the most power, widest range, tunes to your cam, etc? You don't. Well, I would build them, not buy, but you're still correct. I can make guesses based on common sense, and available information and design programs. A person would need an accumulated knowledge based on years of experience, trial and error, dyno work and on track testing, to achieve the last little bit of benefit out of their particular combination. Most people aren't at that level - Pro Stock, Comp, even high end Super Stock - and headers have to be a series of compromises They have to fit, be able to get on and off the car, and not cost a million bucks. And most people won't replace or modify them for every tuning change. Building headers isn't that hard. Getting the correct tube dimensions into the space available and around all the stuff in the way, and keeping them reasonably close to equal length with the collector where it needs to be, is the trick The last paragraph is about as succinct and correct as you can say it. There are always compromises. I'll take access to spark plugs and fit over a tube length of plus or minus a half inch. Also, I've found the closer to the head the first bend is, the bigger the tube has to be, all else being equal. And the more bends the bigger the tube has to be.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Approximate price for custom Headers
[Re: Sammy]
#2574127
11/04/18 11:03 PM
11/04/18 11:03 PM
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Joined: Jan 2003
Posts: 19,537 Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,537
Las Vegas
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These days with steel prices for mild you are likely looking at $1400-1700 depending on the car they are going in. IE tube chassis, stock chassis, etc. In stainless $3K and up for sure.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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