Header Fab (LARGE PICS- 56K dialup users are hereby warned)

wideopen said:
Nice work Brandon...I was expecting PVC?
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It's come a long way since this, huh?

K31PVC.jpg
 
McMaster-Carr. If I had a corporate account, it would be cheaper but I don't.

(QTY 4) 43425K167
Unthreaded Std-Wall Steel Butt-Weld Fitting 2" Pipe, 90 Deg Short Elbow, 2" Radius, Sch 40
In stock at $20.05 Each

(QTY 2) 43425K162
Unthreaded Std-Wall Steel Butt-Weld Fitting 2" Pipe Size, 45 Degree Elbow, Schedule 40
In stock at $18.08 Each

(QTY 2) 7750K116
(Same as 7750K136)
Unthreaded Standard-Wall Welded Steel Pipe 2" Pipe, 1' Length, Butt-Weld X Butt-Weld
In stock at $11.53 Each
 
Hu, more pictures from Brandon with big editing on them. Wonder whats behind that black cover?
 
Probabally a big green rail or something! LMAO! Brandon, it looks kick azz! nice job. And thanks for posting up the materials list. LOL The schedule 40 should be fine. My friend built his header for his pulling truck with schedule 40 and ran it for 3yrs without any problems.
 
cquestad said:
I pay 1/5 that for the weld fittings...ouch.
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I figured they were high- what other distributors will sell to the guy off the street for 1/5 of the price?

JerrodGlover said:
Hu, more pictures from Brandon with big editing on them. Wonder whats behind that black cover?
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Probably a big black thing. :hehe:
 
Any local pipe supply house can get them for you Brandon. You may need to order some but there fairly common in gas lines for buildings.
 
I don't understand why people are making manifolds like this. I don't want to knock the poster, I am a big fan of DIY projects. There are way more advantages to merge collector style manifolds. The gases hit enter the turbine at the same place instead of colliding in the log manifold.

Sure it is an improvement over stock but compared to the style of comp461 or passenger performance there are more benefits to their design.

Having the gases merge in a collector will allow quicker spool and lower temp compared to a log manifold. Also lower drive pressure since there is an easier path to follow.
 
I'm guessing that at least part of Brandon's design is to clear the turbo(s) in the space under the hood of whatever it's going in...


NICE work farmer!
 
I think its so it clears the windshield. There is only so much room under the glass in a geo metro. As for it being blacked out, would you be proud of a geo metro?
geo.jpg
 
sdubfid said:
I don't understand why people are making manifolds like this. I don't want to knock the poster, I am a big fan of DIY projects. There are way more advantages to merge collector style manifolds. The gases hit enter the turbine at the same place instead of colliding in the log manifold.

Sure it is an improvement over stock but compared to the style of comp461 or passenger performance there are more benefits to their design.

Having the gases merge in a collector will allow quicker spool and lower temp compared to a log manifold. Also lower drive pressure since there is an easier path to follow.
Click to expand...
I agree there are more efficient ways to accomplish the same manifold. However, with the straight 6 firing order, the pulses are evenly distributed each half of the bank (123, 456) which isn't the worst way to approach the matter either.

The other thing to consider is a practical consideration like tex said. The A-arm would have been ~6" away from a true, equal-length, 'ram head' manifold. I need at least 14" to for the primary compressor housing. Also, it would have blocked my only option for downpipe location and provides a mild steel surface to weld in the external wastegate flange.

Thanks Bodie! I hold you responsible for inspiring such a creation.
 
sdubfid said:
I don't understand why people are making manifolds like this. I don't want to knock the poster, I am a big fan of DIY projects. There are way more advantages to merge collector style manifolds. The gases hit enter the turbine at the same place instead of colliding in the log manifold.

Sure it is an improvement over stock but compared to the style of comp461 or passenger performance there are more benefits to their design.

Having the gases merge in a collector will allow quicker spool and lower temp compared to a log manifold. Also lower drive pressure since there is an easier path to follow.
Click to expand...



When we built my header it is equal lenth... but after a lot of thought and research an equal lenth header doesn't make a difference in a turbo application because equal lenth promotes scavenging of the exhaust pulses and we don't have that in a turbo diesel, you have back psi in the header. What does help is better flow to the turbo. Also to much flow slows down the spool up. We used the same piping that you guys are using and when i first put mine on it wouldnt spool...very laggy, compaird to the stock manifold!
 
Brushpuller: How does "to much flow hurt spoolup"? Please explain.
 
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