Finally Done...
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Why didnt you just buy a 180 bend, cut it, trim it, rotate it and weld it once instead of 11 pie cuts? I have 3, 3.5 and 4 in ss sitting in the garage. It may be a good idea to grind all that sugar out of the tube before it breaks off. Other than that good job.
This pic is going to end up on a fail poster.

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That pie cut down pipe is for JDM POINT'S duh!!
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shoulda used tittymania....err...titanium for mad jdm props though
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DelSlow;288464 wrote:
Oh I dunno...bend radius?Is that Sch. 40? It looks thick enough to be...
Either way, like everyone else, I'd be worried about those welds holding up in the long run... lot of potential for failure there.
The manifold is pretty damn nice, who made it, or where'd it come from? Don't see those "T"s used too often, love the minimum number of welds that requires.
So, is that 33.33 per wheel?
Whats it make to the rears? -
63vette;288460 wrote:
Why didnt you just buy a 180 bend, cut it, trim it, rotate it and weld it once instead of 11 pie cuts? I have 3, 3.5 and 4 in ss sitting in the garage. It may be a good idea to grind all that sugar out of the tube before it breaks off. Other than that good job.This pic is going to end up on a fail poster.

Ok for one that is a 2.5" dp, and i can tell you have never worked in a confined space. the "pie" cuts allow for an infinite bend radius. pretty much what ever i feel is needed. there is no other way to accomplish what we had to do here using a mandrel bend. plain and simple.
also how would "suger" break off in the downpipe effect anything at all? it's in the downpipe.
Now onto you saying that was fail. I'm all ears to how you would build that downpipe with the same radius using a u bend. not going to happen again.
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Chance91;288504 wrote:
Is that Sch. 40? It looks thick enough to be...Either way, like everyone else, I'd be worried about those welds holding up in the long run... lot of potential for failure there.
The manifold is pretty damn nice, who made it, or where'd it come from? Don't see those "T"s used too often, love the minimum number of welds that requires.
So, is that 33.33 per wheel?
Whats it make to the rears?well I'm not to worried about it, there is very minimal stress on the downpipe unless your banging it off the ground (will :icon_shaking:)....
The manifold is sch 10 but the T's come with the straight section out of sch 40 for some reason.
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Why is that flange so fat? 1''?
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DrifterExtreme;288513 wrote:
Ok for one that is a 2.5" dp, and i can tell you have never worked in a confined space. the "pie" cuts allow for an infinite bend radius. pretty much what ever i feel is needed. there is no other way to accomplish what we had to do here using a mandrel bend. plain and simple.also how would "suger" break off in the downpipe effect anything at all? it's in the downpipe.
Now onto you saying that was fail. I'm all ears to how you would build that downpipe with the same radius using a u bend. not going to happen again.
Yeah right. I dont know shit about building cars. I will put a grand that says I can make a better downtube for that car than your 11 pie cut pile of junk. Put your money where your pie cut hole is.
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DrifterExtreme;288515 wrote:
well I'm not to worried about it, there is very minimal stress on the downpipe unless your banging it off the ground (will :icon_shaking:)....The manifold is sch 10 but the T's come with the straight section out of sch 40 for some reason.
That is odd. Great looking Mani, and it'll be around for the long haul it sounds like.
Still, that downpipe section gives me the willies. Seen a few cracked welds before on Miata's, though, there isn't a ton of stress on it like you said, from the looks of it. different story with our setup..
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aliengotpsi;288529 wrote:
why is that flange so fat? 1''?internal wastegate
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63vette;288530 wrote:
I dont know shit about building cars.thanks for the sig
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aliengotpsi;288529 wrote:
Why is that flange so fat? 1''?Well, i was having these made at a machine shop and i had talked with him about making them out of 3/4" and making a pocket for the internal flaper to have plenty of flow.
After making the first one they will flow tons, but there just a little thick. so i will be cutting them down slightly.
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63vette;288530 wrote:
Yeah right. I dont know shit about building cars. I will put a grand that says I can make a better downtube for that car than your 11 pie cut pile of junk. Put your money where your pie cut hole is.So then do it. You have no clue the space constraints yet think you will make one with a fucking u -bend. Get your head out of your ass and realize that you can't buy 2.5" u-bends with a fucking 1.5",1.75", 2" CLR.
I don't do pie cuts because there "JDM" i do them when there is no bend that will fit given the CLR.
I'm not going to argue with you over a downpipe. so drop it.
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