mazdadrifter

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?

setzep

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 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



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.



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

matt_sb2000

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.

setzep

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.

matt_sb2000

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 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



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.



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 [/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.

setzep

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.

matt_sb2000

I stole this pic from the other thread..











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.

setzep

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.

matt_sb2000

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.

setzep

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