Urinemachine

Anyone do something like this?


Dual WG Setup by Jon Kensy, on Flickr

It'd let me link the bottom sides of two wastegates together vs using a T or splitter... but not sure it will be ideal as the ports inside the wastegates are not a full 1/4" in the body of the wastegates.

Anyone do this?

OneBadTurboCRV

I have done something similar, but never with hose. The openings do not have to be a full 1/4" to work right. I would however, get some of those TIG welds redone.

Urinemachine

Why?

OneBadTurboCRV

Undercut + Lack of filler + Stainless + plenty of heat cycles = Weld Cracking

Also, hard to tell from picture but juding from flange connection VS pipe to pipe there isn't a pulser on the machine or the setting wasn't used.

Urinemachine

This setup has been on the car for a while now. Just modified to dual wastegates. You don't need pulsing

They're actually not undercut

http://www.flickr.com/photos/67031861@N08/8480803286/http://www.flickr.com/photos/67031861@N08/8480803286/ by http://www.flickr.com/people/67031861@N08/, on Flickr

Back purged and TIG'd with 0.035" wire at 40A. Works fine. Don't nit pick not the prettiest lines as 1.75" pipe is still hard for me, but definitely not subject to cracking etc.

OneBadTurboCRV

Hehe, I knew when you asked specificly about the welds that you had done them. Look at the first picture supplied in first post, the weld is under the plane (given that isn't the definition for undercutting). Everybody starts somewhere, it's all good, but a pulser would greatly help either way. Sorry to stray your topic and make you defend yourself.

tepid1

I wouldn't run them in series. One wastegate is going to have priority over the other.

Put a 't' fitting between the two so they see an equal pressure.

scottdh20

I run two wastegates on my divided manifold. I run one hose from the holset compressor housing to a mbc to a tee that splits to both wastegates

Urinemachine

rofl

Yeah, defend myself. The pic is deceiving. This is on my 700 rwhp pump gas bmw. Runs just fine for 10k miles now, no cracked welds yet.. I better hope and pray though!

Actually, I tried it out. Works fine:

http://vimeo.com/59877869

OneBadTurboCRV

Glad to see it worked out for you. Like I said, I have done it before. Some people just don't understand how pneumatics work. To build pressure the void has to be filled and air compressed. Simple concept really.

wantboost

iTrader: (2)

I've never really liked using a pulses, I dunno why lol

But yes I wouldn't run them in series because as others have said, one will have priority

Why are you trying to run them this way? What ems and boost control solenoid.

Urinemachine

How will one have priority they clearly open up in tandem

tepid1

Your pressure source is not the same as what you'll see on the car. You have a large volume and big lines. I've logged the pressure in the bottom of the gates and I can see a delay. There may be other contributing factors that your missing. If the manifold is divided you'll have a delta in backpressure. That plays a role in how fast or slow the gate opens and closes.

Your test is cool, but it's not what is happening on the car. Sorry.

EDIT: Just realized that you're not using a divided manifold there. That pretty much negates my arguement. lol

OneBadTurboCRV

That was my entire point... should have stated it before.

Urinemachine

I am using the same exact tubing on the test as in the car. I run a 76mm turbo on 3" charge pipes, etc. the plumbing is EXACTLY the same in the test as on the car. It will not differ in the least. The only thing that will be difference is back-pressure against the valves which will actually HELP lift the valve initially.