I build turbo manifolds, normally just for hondas and neons. I have a friend with a turbo 2, and I built this manifold for his car. I can make more of them if there is any interest.



It is schedule 40 mild steel, and is tig welded. Any comments / feedback is welcomed.





Thank you.



Matt

Another pic.

Matt, intrest is better gnerated with a price attached https://www.nopistons.com/forums/pub...IR#>/smile.png

Well, I don't want to get banned or anything for making a f/s thread in a tech forum.





Tell me what you think is a fair price?

Looks nice. How is the fitment when installed in the car?

I don't know yet. You can see that it is really tight on the motor, so it should fit in the car good.





If you guys really need to see pics of that, I suppose that I can bolt it on this weekend and take pics.





Here is another pic.

Well so far it looks really kickass!

not bad. Looks like you do some nice work

Thank you .

putting a price is fine. we aren't like that around here unless you are blatantly an ******* https://www.nopistons.com/forums/pub...IR#>/smile.png

I try to. And thanks for the compliment.







Does anyone see any flaws in the design? Like should I make 2 runners for the w/g?





Any input is appreciated.

Looks good, but what are the specs, thickness, inner diameter ect.. I dunno about rerouting the wg all the way back form that far forward..

Cool, right on. I am used to some other forums that have strict policies about selling stuff in tech forums. And selling stuff in general if you aren't a site sponsor.





It is good to see that there is a positive attitude here with you guys.







Anyways, as far as pricing goes. I am thinking somewhere between $300 - $450. I have about 8 hours of labor invested into this manifold. It takes time to make stuff like this.





If my price is too high just say something, I am an enthusiest just like the rest of you. I like to see the rotary cars beat up on the hondas. https://www.nopistons.com/forums/pub...IR#>/smile.png

Okay, specs are as follows.





Tubing is 2"id schedule 40 black pipe / steam pipe. I belive that the wall thickness is 1/4"





The motor flange is Racing Beat... Im sure that you knew that.



The t4 flange is 1/2" cnc machined mild steel.



Wastegate flange is 35mm tial / evo / deltagate.







The wastegate elbow can be turned around if needed. This is the first one that I made, so nothing is set in stone.





I will warrantee the manifold for one year. It will not crack, I promise.





Well... Unless you are boosting 30psi and jump the car into a frozen lake or something.... But at that point you have more to worry about then my manifold.

Looks pretty good for something you fabbed yourself. Nice to see someone trying to help save some other rotary nuts some money.

https://www.nopistons.com/forums/pub...>/bigthumb.gif







Another pic.

How come you decided not to use stainless?? I like that you used equal runners for it.



I haven't heard the best things about mild steel, but I guess the wall thickness helps it retain it's structure?

That manifold will outlast the car, sch40 is very thick. It's not made out of tubing like some other manifolds.



Nice job on the manifold, you are obviously a skilled TIG welder.

I would think about maybe ditching the smaller 35mm WG in favor of a larger one. That looks like a small turbine housing on that turbo. I guess time will tell though how it all works out.

its a nice manifold but for $300 you can get a HKS cast manifold... i think. just for reference

That manifold will outlast the car, sch40 is very thick. It's not made out of tubing like some other manifolds.



Nice job on the manifold, you are obviously a skilled TIG welder. [/quote]

Yes, it is very thick. The only downside to using mild steel is that it will rust. But so does your turbine housing, so it really isn't that big of a deal.





That is just a cosmetic issue. The welds won't rust. hehe Those are 308 stainless.

I would think about maybe ditching the smaller 35mm WG in favor of a larger one. That looks like a small turbine housing on that turbo. I guess time will tell though how it all works out. [/quote]

The wastegate flange can be changed to something else. Make a suggestion as to what you would like to see on there. Racegate?







Kind of ot but, you said that the turbine housing is small. Will the car be nice and responsive? Or is it going to choke it?

http://www.srmotorsports.com/manifld.jpg





http://www.srmotorsports.com/srtrbos.html







Just an example.

I would think about maybe ditching the smaller 35mm WG in favor of a larger one. That looks like a small turbine housing on that turbo. I guess time will tell though how it all works out. [/quote]

The wastegate flange can be changed to something else. Make a suggestion as to what you would like to see on there. Racegate?







Kind of ot but, you said that the turbine housing is small. Will the car be nice and responsive? Or is it going to choke it? [/quote]

I'm just saying the size may be a bit small. Most people run at least a 40mm. Of course each different manifold design can compliment a smaller or larger WG though. I have no experience with the turbonetics wastegates but have herd some people complain about them. I've never herd a complaint about Tial products, thats why I went with one.



What a/r and trim is that housing/turbine wheel? I doubt it will "choke" it but I'm sure if there were a larger turbine housing on it the .7 front could be taken full advantage of. It just looks a little mismatched is all (turbine a/r to compressor a/r). The rotary likes a big fat turbine housing https://www.nopistons.com/forums/pub...IR#>/smile.png Who knows you may find that you'll have to go with a .6 on the front because it might hit the strut tower once it's in the car.

http://www.srmotorsports.com/manifld.jpg





http://www.srmotorsports.com/srtrbos.html







Just an example. [/quote]

You can't beat that for 300-450. It takes time to make these. If I were to make custom manifolds I would charge at least 450 for a divided tubular manifold, maybe a bit cheeper for a simple one. I would say you are offering a good deal

I would think about maybe ditching the smaller 35mm WG in favor of a larger one. That looks like a small turbine housing on that turbo. I guess time will tell though how it all works out. [/quote]

The wastegate flange can be changed to something else. Make a suggestion as to what you would like to see on there. Racegate?







Kind of ot but, you said that the turbine housing is small. Will the car be nice and responsive? Or is it going to choke it? [/quote]

I'm just saying the size may be a bit small. Most people run at least a 40mm. Of course each different manifold design can compliment a smaller or larger WG though. I have no experience with the turbonetics wastegates but have herd some people complain about them. I've never herd a complaint about Tial products, thats why I went with one.



What a/r and trim is that housing/turbine wheel? I doubt it will "choke" it but I'm sure if there were a larger turbine housing on it the .7 front could be taken full advantage of. It just looks a little mismatched is all (turbine a/r to compressor a/r). The rotary likes a big fat turbine housing https://www.nopistons.com/forums/pub...IR#>/smile.png Who knows you may find that you'll have to go with a .6 on the front because it might hit the strut tower once it's in the car. [/quote]

I see what you are saying. Alot of people talk **** about the deltagate... I have installed at least 20 of them, and I have never had a problem with boost creep.





The new evolution wastegate from turbonetics looks promising. The one that I can get right now is what's in the pictures. The other version of it is going to be v band clamps. hehe No more thought about how the wg flange is positioned.







I don't know the specs of that turbo. We bought it from a friend. They had it on a rotary car. The motor let go after 2 passes...





I'll borrow a larger turbine housing and change it out on the dyno. We'll see what differences there are that way.

I would think about maybe ditching the smaller 35mm WG in favor of a larger one. That looks like a small turbine housing on that turbo. I guess time will tell though how it all works out. [/quote]

The wastegate flange can be changed to something else. Make a suggestion as to what you would like to see on there. Racegate?







Kind of ot but, you said that the turbine housing is small. Will the car be nice and responsive? Or is it going to choke it? [/quote]

I'm just saying the size may be a bit small. Most people run at least a 40mm. Of course each different manifold design can compliment a smaller or larger WG though. I have no experience with the turbonetics wastegates but have herd some people complain about them. I've never herd a complaint about Tial products, thats why I went with one.



What a/r and trim is that housing/turbine wheel? I doubt it will "choke" it but I'm sure if there were a larger turbine housing on it the .7 front could be taken full advantage of. It just looks a little mismatched is all (turbine a/r to compressor a/r). The rotary likes a big fat turbine housing https://www.nopistons.com/forums/pub...IR#>/smile.png Who knows you may find that you'll have to go with a .6 on the front because it might hit the strut tower once it's in the car. [/quote]

I see what you are saying. Alot of people talk **** about the deltagate... I have installed at least 20 of them, and I have never had a problem with boost creep.





The new evolution wastegate from turbonetics looks promising. The one that I can get right now is what's in the pictures. The other version of it is going to be v band clamps. hehe No more thought about how the wg flange is positioned.







I don't know the specs of that turbo. We bought it from a friend. They had it on a rotary car. The motor let go after 2 passes...





I'll borrow a larger turbine housing and change it out on the dyno. We'll see what differences there are that way. [/quote]

I think it's just the heat and airflow the rotary puts out that doesn't make those wastegates very compatable. I think it may be a different story with 4cyl piston engines and WG choice.



Thats once thing I'd like to have on my next WG, V-band. But I'm not sure I'll ever need another WG now that I have a tial https://www.nopistons.com/forums/pub...DIR#>/wink.png



If you put a larger turbine housing on at the dyno watch the AFR. I'm sure it will rise as wel as the HP numbers. Get ready to add fuel.

I would think about maybe ditching the smaller 35mm WG in favor of a larger one. That looks like a small turbine housing on that turbo. I guess time will tell though how it all works out. [/quote]

The wastegate flange can be changed to something else. Make a suggestion as to what you would like to see on there. Racegate?







Kind of ot but, you said that the turbine housing is small. Will the car be nice and responsive? Or is it going to choke it? [/quote]

I'm just saying the size may be a bit small. Most people run at least a 40mm. Of course each different manifold design can compliment a smaller or larger WG though. I have no experience with the turbonetics wastegates but have herd some people complain about them. I've never herd a complaint about Tial products, thats why I went with one.



What a/r and trim is that housing/turbine wheel? I doubt it will "choke" it but I'm sure if there were a larger turbine housing on it the .7 front could be taken full advantage of. It just looks a little mismatched is all (turbine a/r to compressor a/r). The rotary likes a big fat turbine housing https://www.nopistons.com/forums/pub...IR#>/smile.png Who knows you may find that you'll have to go with a .6 on the front because it might hit the strut tower once it's in the car. [/quote]

I see what you are saying. Alot of people talk **** about the deltagate... I have installed at least 20 of them, and I have never had a problem with boost creep.





The new evolution wastegate from turbonetics looks promising. The one that I can get right now is what's in the pictures. The other version of it is going to be v band clamps. hehe No more thought about how the wg flange is positioned.







I don't know the specs of that turbo. We bought it from a friend. They had it on a rotary car. The motor let go after 2 passes...





I'll borrow a larger turbine housing and change it out on the dyno. We'll see what differences there are that way. [/quote]

I think it's just the heat and airflow the rotary puts out that doesn't make those wastegates very compatable. I think it may be a different story with 4cyl piston engines and WG choice.



Thats once thing I'd like to have on my next WG, V-band. But I'm not sure I'll ever need another WG now that I have a tial https://www.nopistons.com/forums/pub...DIR#>/wink.png



If you put a larger turbine housing on at the dyno watch the AFR. I'm sure it will rise as wel as the HP numbers. Get ready to add fuel. [/quote]

Well, as far as heat and flow are concerned with the rotary / deltagate. I cut a hole in my friends stock manifold, and welded an elbow and wastegate flange to it. It controls boost from 3psi to 12 psi just fine. https://www.nopistons.com/forums/pub...IR#>/dunno.gif



That has been on the car for about 6 months with no problems.







V band is the ****. I wish everything was v band.







And yeah, changing the turbine housing is going to lean it out. We have larger injectors, good fuel pump, and a afc. It should be fine for 10psi.

http://www.srmotorsports.com/manifld.jpg





http://www.srmotorsports.com/srtrbos.html







Just an example. [/quote]

yes but stainless it'self is very expensive



I'm not sure about the steel you are using

http://www.srmotorsports.com/manifld.jpg





http://www.srmotorsports.com/srtrbos.html







Just an example. [/quote]

yes but stainless it'self is very expensive



I'm not sure about the steel you are using [/quote]

I can make it out of stainless for the same price.





Stainless is just bling factor. Mild steel is perfectly acceptable for applications like this.

http://www.srmotorsports.com/manifld.jpg





http://www.srmotorsports.com/srtrbos.html







Just an example. [/quote]

yes but stainless it'self is very expensive



I'm not sure about the steel you are using [/quote]

I can make it out of stainless for the same price.





Stainless is just bling factor. Mild steel is perfectly acceptable for applications like this. [/quote]

why did you decide to use scheduel 40 then?

I would think about maybe ditching the smaller 35mm WG in favor of a larger one. That looks like a small turbine housing on that turbo. I guess time will tell though how it all works out. [/quote]

The wastegate flange can be changed to something else. Make a suggestion as to what you would like to see on there. Racegate?







Kind of ot but, you said that the turbine housing is small. Will the car be nice and responsive? Or is it going to choke it? [/quote]

I'm just saying the size may be a bit small. Most people run at least a 40mm. Of course each different manifold design can compliment a smaller or larger WG though. I have no experience with the turbonetics wastegates but have herd some people complain about them. I've never herd a complaint about Tial products, thats why I went with one.



What a/r and trim is that housing/turbine wheel? I doubt it will "choke" it but I'm sure if there were a larger turbine housing on it the .7 front could be taken full advantage of. It just looks a little mismatched is all (turbine a/r to compressor a/r). The rotary likes a big fat turbine housing https://www.nopistons.com/forums/pub...IR#>/smile.png Who knows you may find that you'll have to go with a .6 on the front because it might hit the strut tower once it's in the car. [/quote]

I see what you are saying. Alot of people talk **** about the deltagate... I have installed at least 20 of them, and I have never had a problem with boost creep.





The new evolution wastegate from turbonetics looks promising. The one that I can get right now is what's in the pictures. The other version of it is going to be v band clamps. hehe No more thought about how the wg flange is positioned.







I don't know the specs of that turbo. We bought it from a friend. They had it on a rotary car. The motor let go after 2 passes...





I'll borrow a larger turbine housing and change it out on the dyno. We'll see what differences there are that way. [/quote]

I think it's just the heat and airflow the rotary puts out that doesn't make those wastegates very compatable. I think it may be a different story with 4cyl piston engines and WG choice.



Thats once thing I'd like to have on my next WG, V-band. But I'm not sure I'll ever need another WG now that I have a tial https://www.nopistons.com/forums/pub...DIR#>/wink.png



If you put a larger turbine housing on at the dyno watch the AFR. I'm sure it will rise as wel as the HP numbers. Get ready to add fuel. [/quote]

Well, as far as heat and flow are concerned with the rotary / deltagate. I cut a hole in my friends stock manifold, and welded an elbow and wastegate flange to it. It controls boost from 3psi to 12 psi just fine. https://www.nopistons.com/forums/pub...IR#>/dunno.gif



That has been on the car for about 6 months with no problems.







V band is the ****. I wish everything was v band.







And yeah, changing the turbine housing is going to lean it out. We have larger injectors, good fuel pump, and a afc. It should be fine for 10psi. [/quote]

Good to see that it's holding up on your friends car. Is he running a stock turbo on that stock manifold? I'm just saying it may be a issue with this new setup you are making because of the larger turbo and larger airflow the system will see.



tag, you're it https://www.nopistons.com/forums/pub...#>/biggrin.png

http://www.srmotorsports.com/manifld.jpg





http://www.srmotorsports.com/srtrbos.html







Just an example. [/quote]

yes but stainless it'self is very expensive



I'm not sure about the steel you are using [/quote]

I can make it out of stainless for the same price.





Stainless is just bling factor. Mild steel is perfectly acceptable for applications like this. [/quote]

why did you decide to use scheduel 40 then? [/quote]

Because it is bomb proof.

http://www.srmotorsports.com/manifld.jpg





http://www.srmotorsports.com/srtrbos.html







Just an example. [/quote]

yes but stainless it'self is very expensive



I'm not sure about the steel you are using [/quote]

I can make it out of stainless for the same price.





Stainless is just bling factor. Mild steel is perfectly acceptable for applications like this. [/quote]

why did you decide to use scheduel 40 then? [/quote]

Sch 40 is very common in the world of pipe. The only downside is it's weight.

I would think about maybe ditching the smaller 35mm WG in favor of a larger one. That looks like a small turbine housing on that turbo. I guess time will tell though how it all works out. [/quote]

The wastegate flange can be changed to something else. Make a suggestion as to what you would like to see on there. Racegate?







Kind of ot but, you said that the turbine housing is small. Will the car be nice and responsive? Or is it going to choke it? [/quote]

I'm just saying the size may be a bit small. Most people run at least a 40mm. Of course each different manifold design can compliment a smaller or larger WG though. I have no experience with the turbonetics wastegates but have herd some people complain about them. I've never herd a complaint about Tial products, thats why I went with one.



What a/r and trim is that housing/turbine wheel? I doubt it will "choke" it but I'm sure if there were a larger turbine housing on it the .7 front could be taken full advantage of. It just looks a little mismatched is all (turbine a/r to compressor a/r). The rotary likes a big fat turbine housing https://www.nopistons.com/forums/pub...IR#>/smile.png Who knows you may find that you'll have to go with a .6 on the front because it might hit the strut tower once it's in the car. [/quote]

I see what you are saying. Alot of people talk **** about the deltagate... I have installed at least 20 of them, and I have never had a problem with boost creep.





The new evolution wastegate from turbonetics looks promising. The one that I can get right now is what's in the pictures. The other version of it is going to be v band clamps. hehe No more thought about how the wg flange is positioned.







I don't know the specs of that turbo. We bought it from a friend. They had it on a rotary car. The motor let go after 2 passes...





I'll borrow a larger turbine housing and change it out on the dyno. We'll see what differences there are that way. [/quote]

I think it's just the heat and airflow the rotary puts out that doesn't make those wastegates very compatable. I think it may be a different story with 4cyl piston engines and WG choice.



Thats once thing I'd like to have on my next WG, V-band. But I'm not sure I'll ever need another WG now that I have a tial https://www.nopistons.com/forums/pub...DIR#>/wink.png



If you put a larger turbine housing on at the dyno watch the AFR. I'm sure it will rise as wel as the HP numbers. Get ready to add fuel. [/quote]

Well, as far as heat and flow are concerned with the rotary / deltagate. I cut a hole in my friends stock manifold, and welded an elbow and wastegate flange to it. It controls boost from 3psi to 12 psi just fine. https://www.nopistons.com/forums/pub...IR#>/dunno.gif



That has been on the car for about 6 months with no problems.







V band is the ****. I wish everything was v band.







And yeah, changing the turbine housing is going to lean it out. We have larger injectors, good fuel pump, and a afc. It should be fine for 10psi. [/quote]

Good to see that it's holding up on your friends car. Is he running a stock turbo on that stock manifold? I'm just saying it may be a issue with this new setup you are making because of the larger turbo and larger airflow the system will see.



tag, you're it https://www.nopistons.com/forums/pub...#>/biggrin.png [/quote]

lol





Yeah, it is a stock turbo on a stock manifold. It works good on his car... for now.







I see what you are saying about flow. If you tie the wastegate runners into the primaries in the right spot a 35mm wastegate is sufficent.



I can change that to 40mm if that makes people feel better.

I think that's the issue I have with my manifold..... WG runner location. I have a big 46mm wg but it creeps like a bastard. It has a 7.25psi spring in it, up to about 6400 it will hold ~8-11psi then after 6500rpm it's like I hit a switch and it climbs right up to 15 by 7k :( I'm also starting to wonder about my timing though, maybe I'm running a bit too retarded at the higher boost level and still burning a bit to much in the manifold.



I'm willing to bet most of the people here would like to see at least a 40mm wg flange. with a large turbo and the want to run lower boost requires a lot of air flow to be vented. I suppose each manifold could be built to each customers specs.

I stole this pic from the other thread..





https://www.nopistons.com/forums/upl...1049682015.jpg





There are 2 possable problems with your setup. One is that the wg runners are so close to the engine. The air right there is traveling so fast that it just blows right over the runner hole.



You could try moving them back to the bends. Where there is deflection of air agianst the pipe. Hopefully that made sense.





My other thought is that the vaccuum line that you are using for the wastegate is too small. I run -4an on almost any wg that I install. I have no problems with creep.





And, yeah. I can change things on the manifold per customer. That isn't a problem.

I know exactly what you are talking about... Too close to the engine :( What baffles me is there is a guy on the other forum that has a similar setup and has no issues. He may have larger primaries though... I'll probably end up trying to move the wg closer to the turbo this winter durring down time.



I run 5/16 line to the wg. I tested the cracking pressure last week and it's right at about 8psi and fully open at 10 so I know the wg is doing it's job just the gasses can't get to it I'm thinking.

Your tubing looks like it's large enough. I don't see that as the problem.



Everything that you said sounds good. just move it twords the bends.

How about timing values? If there are too retarded would that cause creep?