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08-23-2010, 06:37 PM
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CC Member
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Join Date: Aug 2010
Cobra Make, Engine:
Posts: 1
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Not Ranked
Upper coolant pipe bend radius
Hello everyone, I am new to the forum looking for some help with the correct 1-3/4" upper coolant tube for a 427 car. Can anyone tell me what the centerline radius of the tube is correct for the 427. Thanks in advance. Rob
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08-23-2010, 07:05 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,000
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Not Ranked
I think mine is pretty darn close to 90 degrees.
Last edited by patrickt; 11-08-2016 at 11:52 AM..
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08-23-2010, 07:54 PM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
NH
Cobra Make, Engine: CSX 4772 old iron FE
Posts: 5,499
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Not Ranked
He's looking for a CLR centre line radius not a bend angle. In this case 3".
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08-23-2010, 08:12 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,000
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Not Ranked
Ahhh, Rick Parker recommends these guys: http://www.burnsstainless.com/tubingmain.aspx Apparently there have been threads on here with guys having problems with crappy connecting tubes. |
08-23-2010, 08:23 PM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
NH
Cobra Make, Engine: CSX 4772 old iron FE
Posts: 5,499
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Not Ranked
Burns does some nice stuff but kinda pricey. The real problem is "Custom bending is available for quantities of 50 pieces or more." If'n your only needing one. The tube goes from 2" at the expansion tank to 1-3/4" at the radiator. I have them available as pictured if you have a need.
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08-23-2010, 08:26 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,000
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Not Ranked
Quote:
Originally Posted by mickmate
The tube goes from 2" at the expansion tank to 1-3/4" at the radiator.
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That's interesting. I bet I've looked at that tube a thousand times and never noticed that before. |
08-23-2010, 08:43 PM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
NH
Cobra Make, Engine: CSX 4772 old iron FE
Posts: 5,499
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Not Ranked
You can see it in your pic where the clamp is cinched down at the tube end. It's hard to notice with your incorrect CLR tube ;-)
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08-23-2010, 09:07 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,000
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Not Ranked
Well it hasn't left me stranded yet. That's pretty much my benchmark anymore....
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08-23-2010, 09:35 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
Burns will expand the ends for $7.00 per expansion,not sure how far the stainless can be stretched (? anyone know?). An option I have used is getting a section of a radiator hose that is shaped correctly an steps up a 1/4". IE: from 1 3/4 to 2" OD. There is one on the lower metal tube here that has the above dimensions. The upper hose changes 1/4" also but in a longer length of hose.
[IMG]  [/IMG]
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
Last edited by Rick Parker; 08-23-2010 at 09:38 PM..
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08-23-2010, 09:42 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
Mickmate:
The swedges on the longer tube are they expanded from the original tube or larger diameter pieces welded and then nicely metal finished??
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way
Last edited by Rick Parker; 08-23-2010 at 11:50 PM..
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08-23-2010, 09:51 PM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
NH
Cobra Make, Engine: CSX 4772 old iron FE
Posts: 5,499
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Not Ranked
The ends are indeed expanded. The electrical connectors I was making at one time would curl your toes how much they would expand them by driving a pin into the ends of the tube. We also swaged the ends down to reduce diameter (and increase wall). The top tube shown in my pic doesn't show the expanded end I put on it. As you said Rick they can be put together from pieces and finished to look purty if you have the time, tools, skills and inclination (all at the same time and place of course).
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08-23-2010, 10:44 PM
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CC Member
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Join Date: Jan 2005
Location: Hillsboro,
OR
Cobra Make, Engine: Scratch built CSX style frame, Carbon fiber body, 393 Stroker, T-bird IRS, T5
Posts: 1,623
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Not Ranked
Quote:
Originally Posted by mickmate
He's looking for a CLR centre line radius not a bend angle. In this case 3".
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I bought a set of these from Nick and they were absolutely perfect and even fit my smallblock waterpump to the lower radiator connection perfectly. Don't know how he did it, but it met the lower radiator bung, went through the Xbrace without touching a thing and lined up perfectly with the water pump outlet. The upper had to be shortened on one leg to fit, but not a big deal.
One of these days I'll post some pics of my build so you can see some of the custom stuff Nick does for these roadsters.
Bob |
08-23-2010, 11:52 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
Are they mild steel or stainless? If stainless what alloy?
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way
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09-10-2010, 07:49 PM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
NH
Cobra Make, Engine: CSX 4772 old iron FE
Posts: 5,499
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Not Ranked
They're 304 stainless. They'll expand about 3/8" without popping them.
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