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Re: New Headers [Re: GTS340] #2909501
04/12/21 03:15 PM
04/12/21 03:15 PM
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JERICOGTX Offline OP
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Originally Posted by GTS340
Originally Posted by Gtxxjon
Supersonic indeed!

Now for the questions?

What car is they on ( 69 Gtx or 68 runner ) and why SO BIG?

If an exhaust valve is approx. 1.81 diameter in a good wedge motor then 2.00 ‘OD’ pipe should be plenty?
Maybe 1-7/8 od is ok too in most cases, or am I missing something???

Would this design work my 71 Gtx (512, 440-1) and how much for another set ( please ) lol...


563 CID and 440-1 CNC 345 heads, I don't know the specifics of the build but that foundation can easily make well over 800 horse. Regardless of the valve size his headers are not too big.
As far as 1-7/8" headers, I don't think I'd run them on anything more than a warmed 383


My personal goal, is to make 850+hp, if possible. Compression will be 13:1 or more, and I'd like to get as aggressive with the cam as possible, with 1.6 rockers. I just picked up a 440-3X intake, hoping that will help the combo. Time will tell, and it is what it is.

563 headers.jpg

69 GTX 68 Road Runner
Re: New Headers [Re: JERICOGTX] #2909503
04/12/21 03:19 PM
04/12/21 03:19 PM
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United Socialist States of Ame...
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Keep up the great work,Jeff! That looks like my intake! Hope to see you guys at the track this year! wave


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Re: New Headers [Re: tboomer] #2909513
04/12/21 04:05 PM
04/12/21 04:05 PM
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Originally Posted by tboomer
Keep up the great work,Jeff! That looks like my intake! Hope to see you guys at the track this year! wave


This would be your intake on steroids. Long ways out, but if we go to CFR, it will be for the Night of Fire.


69 GTX 68 Road Runner
Re: New Headers [Re: JERICOGTX] #2909521
04/12/21 04:25 PM
04/12/21 04:25 PM
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Cool! Lots of work on your intake,I presume?


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Re: New Headers [Re: tboomer] #2909535
04/12/21 05:28 PM
04/12/21 05:28 PM
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Originally Posted by tboomer
Cool! Lots of work on your intake,I presume?


Not really. The 440-3X intake is bigger than your 440-3 intake. Plenum is bigger, making the runners a little longer. I can post a picture of the differences, when I get home tonight.


69 GTX 68 Road Runner
Re: New Headers [Re: JERICOGTX] #2909544
04/12/21 06:04 PM
04/12/21 06:04 PM
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Gotcha Jeff! I missed the "X" part!


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Re: New Headers [Re: tboomer] #2909681
04/13/21 06:26 AM
04/13/21 06:26 AM
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Ted, here is the difference between the -3, and the 3X. Here you can see the plenum size difference. the 3X is over a inch taller then the -3.

563intakes.jpg

69 GTX 68 Road Runner
Re: New Headers [Re: JERICOGTX] #2909682
04/13/21 06:30 AM
04/13/21 06:30 AM
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Thanks Jeff! That is one tall intake! wave


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Re: New Headers [Re: JERICOGTX] #2909683
04/13/21 06:31 AM
04/13/21 06:31 AM
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Headers are completely done. Finished welding the collectors on, adding a couple V band clamps, and EGT bungs in each cylinder. A coworker did all of the tube butt welds, and I took care of the V bands, and collectors. I'm more than happy with how they turned out. It will be a while before they get installed into the car, but they are one big piece of the puzzle that is completed.

headervband1.jpgheadervband2.jpg

69 GTX 68 Road Runner
Re: New Headers [Re: JERICOGTX] #2909711
04/13/21 09:38 AM
04/13/21 09:38 AM
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gzig5 Offline
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Can you comment on how much you have in the primary tube material? How much more for SS over mild steel in the same size?

Re: New Headers [Re: gzig5] #2909712
04/13/21 09:42 AM
04/13/21 09:42 AM
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Originally Posted by gzig5
Can you comment on how much you have in the primary tube material? How much more for SS over mild steel in the same size?


I ordered all my stainless tubing from www.stainlessheaders.com, and have around $850 into material. Add in flanges, collectors, V band clamps, O2 sensor bungs, and EGT bungs, and I have around $1300 into the headers all together. Spendy, but they should last a life time.

I never really priced out mild steel, so not sure of the savings.

Last edited by JERICOGTX; 04/13/21 09:43 AM.

69 GTX 68 Road Runner
Re: New Headers [Re: JERICOGTX] #2909774
04/13/21 01:07 PM
04/13/21 01:07 PM
Joined: Sep 2003
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north of coder
moparx Offline
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beautiful work indeed ! bow
i wished i could only have 1/10th the welding talent you posses !
beer

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