Single Turbo RX-7's Questions about all aspects of single turbo setups.

Turbo manifolds really $1000????

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Old 08-07-09 | 12:13 AM
  #26  
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From: cold
You learn a little bit about this stuff if you ever take any kind of cost accounting. When you buy a $1000 manifold, you are paying for

1) the steel flanges and pipes, as has been discussed

2) the labor for someone to fabricate it

3) the welding supplies. Shielding gas isn't cheap, and the cost of the welder itself is allocated in portions to each product it produces. So for arguments sake, if a nice welder cost the shop $5,000 and 100 people buy the manifold, you are each paying $50 for the welder.

4) the development time that went into it to make sure it fits and has a low likelihood of cracking

5) hopefully a warranty. You and everyone who buys that manifold are effectively paying into a sort of insurance program. 100 people buy a manifold, figure they are all paying x extra dollars (wrapped into the price) to cover the cost of the few that may in fact fail despite all the engineering that has gone into the piece

6) shop overhead
Old 08-07-09 | 10:55 AM
  #27  
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Fritts-

Im not arguing that it is highly significant. You are probably correct that spool time and max power are very slightly different. However this is what i have been reading so this is what i have been led to believe and therefore i want to do it the best way i can afford the first time so im not in wonder later... (maybe it would spool quicker and have more power if i had a differnt mani.=...etc etc) I have never had a turbo car. This will be my first. I was just trying to explain some of the logic to the guys on here that say they will make a manifold for $200 dollars and expect it to perform or hold up as good as a professional $1000 mani. You may be right about the egts too it would be cool to seee some actual tests done on a rotary
Old 08-07-09 | 03:41 PM
  #28  
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Originally Posted by Viking War Hammer
I too thought they were over-priced until I tried building one myself. I spent a few hundred dollars on materials, flanged and a $500 Lincoln Mig.

30 hours of labor later, I gave up and had A-Spec build me a custom T6 manifold.

Read,

https://www.rx7club.com/single-turbo-rx-7s-23/those-who-build-manifolds-living-%2A%2Apics%2A%2A-703789/

and,

https://www.rx7club.com/single-turbo-rx-7s-23/my-new-turbo-manifold%3B-thanks-spec-%2A%2Apics%2A%2A-793593/




FAP FAP FAP FAP....man A Spec makes Premo ****

Last edited by GoodfellaFD3S; 08-07-09 at 06:01 PM. Reason: please dont quote all the pictures.
Old 08-07-09 | 04:48 PM
  #29  
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Originally Posted by zaridar
Fritts-

Im not arguing that it is highly significant. You are probably correct that spool time and max power are very slightly different. However this is what i have been reading so this is what i have been led to believe and therefore i want to do it the best way i can afford the first time so im not in wonder later... (maybe it would spool quicker and have more power if i had a differnt mani.=...etc etc) I have never had a turbo car. This will be my first. I was just trying to explain some of the logic to the guys on here that say they will make a manifold for $200 dollars and expect it to perform or hold up as good as a professional $1000 mani. You may be right about the egts too it would be cool to seee some actual tests done on a rotary
Understand NP. I need to go back to my Thermo books evidently anyway....
Old 08-08-09 | 12:13 AM
  #30  
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Sounds to me like you have never made one then. I easily spent $500 on 321 SS tubing and a weeks worth of work getting the design tweaked to where I wanted it. It was only $500 because I made my own 304 SS engine/turbo/wastegate flanges too...
u r funny, take a look at my photo ablum. my point is that for the average joe to make a manifold it might be costly cause its ur first time doing one so the cost might get to a $1000; but think about a shop that has all those welding equipments already, the most it's gonna cost them is a $150 in material. so again $1000 is over priced. welding gas is not that expensive either, i have all them all. for cost and performance nothing beats schedule 40.
Old 08-08-09 | 12:54 AM
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Originally Posted by killahrx7
u r funny, take a look at my photo ablum. my point is that for the average joe to make a manifold it might be costly cause its ur first time doing one so the cost might get to a $1000; but think about a shop that has all those welding equipments already, the most it's gonna cost them is a $150 in material. so again $1000 is over priced. welding gas is not that expensive either, i have all them all. for cost and performance nothing beats schedule 40.
There are no clear pictures of any exhaust manifolds in your photo album. I built mine from 0.065" wall 321 SS tubing from Burnsstainless; the bends were $70+ each... Add in a pound or so of 347 filler rod and a shitload of argon from backpurging every weld and it adds up to $500+ real quick. The manifold is pretty light and durable as hell; I've had the entire thing glowing bright orange on many occasions without a crack or a hint of corrosion.
Old 08-08-09 | 01:02 AM
  #32  
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i guess that big holset hx60 bolted itself to a cast iron t4 flange and the hx55 that is mounted at the radiator support is also on stock manifold. again my point is for a company who buys all those materials at bulk prices and is not making it for the first time it's alot to charge someone a $1000. it might cost you that much but if you were supposed to do another one will it cost just as much? oh and yes the pic of the black car which i mine the manifold is not clear but my point also was to show you that YES i've made manifolds before. i just finished making one for a customer today.
Old 08-08-09 | 01:06 AM
  #33  
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Originally Posted by killahrx7
u r funny, take a look at my photo ablum. my point is that for the average joe to make a manifold it might be costly cause its ur first time doing one so the cost might get to a $1000; but think about a shop that has all those welding equipments already, the most it's gonna cost them is a $150 in material. so again $1000 is over priced. welding gas is not that expensive either, i have all them all. for cost and performance nothing beats schedule 40.

If you can build a comparable manifold to this for less than $500 i will take three of them. Oh, and they need to be light as well




Old 08-08-09 | 01:16 AM
  #34  
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wow ur right it has to be light, i think we should tell the turbo manufactures to make lighter turbine housings like the one in the picture too, oh how about the complete turbo lighter since we want to save 5-10lbs on a manifold. turn up the boost if you have a weight problem.
Old 08-08-09 | 01:22 AM
  #35  
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Originally Posted by killahrx7
i think we should tell the turbo manufactures to make lighter turbine housings like the one in the picture too

They have already done that but it too is expensive and unfortunately they don't make one for the turbo i am running. That manifold is probably half the weight of a weld-el manifold. If it were only a few pounds i wouldn't sweat it but i figured i go with better materials and the weight savings would just be icing on the cake.
Old 08-08-09 | 01:32 AM
  #36  
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well i've not had any problems with the material i'm using, i've seen it glow red red after many highway pulls and still no cracks. so i guess it's different strokes for different folks.
Old 08-08-09 | 01:35 AM
  #37  
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Exactly. I have seen cars with weld-el manifolds that were much faster than mine. To answer the question the OP asked, No $1000 is not out of line for a high end manifold and Yes you can have one made that will perform very well for much less.
Old 08-08-09 | 03:31 PM
  #38  
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Originally Posted by 13B-RX3
If you can build a comparable manifold to this for less than $500 i will take three of them. Oh, and they need to be light as well




Allen, do you have a part number for that air filter?
Old 08-08-09 | 03:32 PM
  #39  
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and to the OP, here is a cheap one for ya

http://www.full-race.com/catalog/pro...oducts_id=1869
Old 08-08-09 | 06:24 PM
  #40  
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Originally Posted by 13B-RX3
If you can build a comparable manifold to this for less than $500 i will take three of them. Oh, and they need to be light as well




Really?? please send me $1500 and you'll have them in two weeks... They'll flow better as well.
Old 08-08-09 | 06:50 PM
  #41  
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Originally Posted by jdmfantasy
Really?? please send me $1500 and you'll have them in two weeks... They'll flow better as well.
Do you flow test or do a CFD analysis? How would you improve the flow other than possibly decreasing the wastegate divergence angle?
Old 08-08-09 | 09:11 PM
  #42  
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Originally Posted by DelSlow
Do you flow test or do a CFD analysis? How would you improve the flow other than possibly decreasing the wastegate divergence angle?
the wastegate tubes are basically the only thing I took into consideration when implying towards better flow. The angles in which the runners meet up with the turbo could also be improved on, looking at the above pic where the turbo is mounted. Ful pen. welds would also eliminate the small ridges on the inside the runners where the material butts together... pretty insignificant but, al the little things add up.
13B - what material is this manifolds? looks nice...
Old 08-09-09 | 08:27 PM
  #43  
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It's 321 stainless. I don't like the angle of the wastegates either but you will have to trust be when i say there was no other way to do it!
Old 08-09-09 | 10:37 PM
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You guys must love doing charity work with the prices you are talking. There is no way your going to making a profit by making those manifolds for $500, especially with them being 321. Like arghx said, there are so many other costs you're not taking into account, unless you're willing to work for like $5 an hour... You can claim that you can make them for these prices all you want, but I wouldn't believe you until you actually have one on the market.
Old 08-09-09 | 11:34 PM
  #45  
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^+10000000
Old 08-10-09 | 12:23 AM
  #46  
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Originally Posted by DelSlow
You guys must love doing charity work with the prices you are talking. There is no way your going to making a profit by making those manifolds for $500, especially with them being 321. Like arghx said, there are so many other costs you're not taking into account, unless you're willing to work for like $5 an hour... You can claim that you can make them for these prices all you want, but I wouldn't believe you until you actually have one on the market.
+2

If you are working out of your house where you dont have extra overhead, sure $500 is good. When you have other factors to pay for, $500 is much too low. Labor cost includes paying the employee doing the work AND making a profit for the business. When you take into account the other factors like overhead(rent, insurance, utilities, etc...) and materials, $1000 isnt bad for a manifold.
Old 08-10-09 | 06:05 PM
  #47  
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Old 08-11-09 | 06:35 AM
  #48  
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I am one of those that spent close to $1K on a turbo manifold, and after reading this thread, I wonder if a thick mild steel would've been a better choice for me
Old 08-11-09 | 07:51 AM
  #49  
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Thumbs up

Originally Posted by 13B-RX3
I spent $850 just on materials for mine. $1000 is not out of line for a quality manifold by any means.
+1 my brother and I have spent the same amount custom making our own and for others...When it comes down to it...material, time and labor, and all the power and electricity used to make this **** when done right using 1/2 inch flanges,SS runners and at that schedule 10 or 40 then v-bands to make it that much prettier things starts to add up quick really quick!!!So a $1000 for a mani is not out of line the seller is almost making no money on the item...
Old 08-11-09 | 08:46 AM
  #50  
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Originally Posted by Jobro
LOL my manifold came from an off-the-shelf workshop operation in Australia. It cost me $350AUD (under $300USD) including shipping and if you buy from there you'll get it less 10% due to no gst but have to pay a lot more in shipping.

1000USD easily paid for

mandrel bent thick wall steampipe turbo manifold
mandrel bent mild steel 3" system from the turbo back
my stainless intercooler pipes
my stainless pod pipe to connect the turbo front to inside the air damn


When I go to a T3/T4/T6 turbo I already have a quote for $750AUD which is about $630USD for another steam pipe turbo manifold and a 3" dump pipe to join to my existing exhaust.

$1000 is a joke

My fabricator is very good at TIG welding and other things and he always does a top notch job. He personally doesn't like using 304 grade staino that the performance crowd seem to love. Basically he says its too hard a metal and will not last the test of time like mild steel will (trading a little bit of surface rust for a piece that won't crack after a few hundred heat cycles)cracking through

can you share the name of that shop? Even with shipping it would benefit alot of us



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