GalantVR4.org The Mitsubishi Galant VR-4 Forum
Galant VR-4 Forums » Galant VR-4 » Technical Discussions » Wastegate location
Previous thread Next thread

Wastegate location


vtecds1
linkfail
625/2000


Galant VR-4 org Post #: 884830 posted 03/25/10 04:56 PM     Remind Me!  Send Private Message   Edit Post      
Can anyone tell me the benefit of the wastegate being run off by the collector or where all the runners meet. These are pics of my current setup. I took the manifold off because the welds where poorly done and it started to crack. One of the runners actually had a weld stop about 1/2" before it made it all the way around. I`m asking because if this setup is a poor choice, I will be going another route in the near future. And please, any comment is welcome but give your take why or why not it's good. Thanks!!!







Before I forget, my wastegate dumps right on top of my cross member...bad idea? Should I extend it where it's open?



Avoiding danger is not cowardice. Courage without discretion is no good. Or you can just say Bahala!!!


Posts: 1704 | From: Las Begas | Member Since: 01/16/04 | IP: (98.226.249.49) | Report this post to a Moderator

Barnes
Firechicken
908/1000
237/2000


Galant VR-4 org Post #: 884832 posted 03/25/10 05:11 PM     Remind Me!  Send Private Message   Edit Post      
Does it control your boost well enough? If yes, then it is probably fine. Save for the cracky manifold.

I would extend the dump tube just so you aren't covering things with soot.



-Jon Barnes
#580/2000 (Long Gone)
#908/1000 Black (Sold)
#237/2000 White

Posts: 6249 | From: Richland, WA | Member Since: 02/09/03 | IP: (68.185.58.90) | Report this post to a Moderator

vtecds1
linkfail
625/2000


Galant VR-4 org Post #: 884839 posted 03/25/10 05:23 PM     Remind Me!  Send Private Message   Edit Post      
It controls the boost fine whenever I get the damn Profec B working right. Also, did you mean save the manifold? As for the soot...There's really no soot where it dumps, but then again...I barely drive it.



Avoiding danger is not cowardice. Courage without discretion is no good. Or you can just say Bahala!!!


Posts: 1704 | From: Las Begas | Member Since: 01/16/04 | IP: (98.226.249.49) | Report this post to a Moderator

Whoodoo
buff guys = good time but my dream is to fondle 1051
62/2000


Galant VR-4 org Post #: 884846 posted 03/25/10 05:43 PM     Remind Me!  Send Private Message   Edit Post      
Going along the route of general airflow dynamics, its slightly beneficial to have the wastegate at a more acute angle to the direction of flow. Also, there is a small benefit to having it at the collector as opposed to on a single runner because it will keep backpressure more or less equal across all the cylinders. If its on a single runner, when the WG opens, it lowers backpressure on that cylinder more than the others.

As for the placement of the dump tube, having it pointing directly onto the cross member, you may see abnormal wear on the finish of the cross member due to the exhaust, but I'm sure it doesn't effect the operation of the WG at all.

Optimizing the location and direction of the WG probably won't give any noticeable performance gains. What it will do is increase efficiency, which could translate into better transient response, decreased heat generation, etc.



62/2k

Posts: 926 | From: Binghamton, NY | Member Since: 07/11/09 | IP: (128.153.223.124) | Report this post to a Moderator

turbowop
Hard Snarker
1051/2000



Galant VR-4 org Post #: 884967 posted 03/26/10 12:31 AM     Remind Me!  Send Private Message   Edit Post      
Some guys have had wastegates that dump on the crossmember melt the wiring harness that runs along the bottom of the core support. That crossmember seems to do a good job of deflecting that heat right to the harness. I would point it a better direction.

In theory, having the wastegate mounted off the collector or off the o2 housing (which is roughly the exact same thing but on the turbo rather than the manifold) is the best choice. In practice, most people don't see much difference between that and having one mounted on one runner.



-Mark

A face only a grocery shopper could love.
1051

Posts: 11965 | From: Yakima, WA | Member Since: 04/29/01 | IP: (68.186.95.172) | Report this post to a Moderator

vtecds1
linkfail
625/2000


Galant VR-4 org Post #: 885039 posted 03/26/10 09:38 AM     Remind Me!  Send Private Message   Edit Post      
Thanks fellas!!! I guess the only down fall in keeping this setup is the access to taking everything apart. The dp took me roughly 2hrs to take off since the bolts/nuts wanted to play hide-n-seek, and to get the manifold out took me roughly over 1hr. BTW, what do you guys think of the heat wrap? Is it really worth having? I don't see too many people running it, but then again a lot of people are running a 2g or Evo3 mani with the heat shield on it.



Avoiding danger is not cowardice. Courage without discretion is no good. Or you can just say Bahala!!!


Posts: 1704 | From: Las Begas | Member Since: 01/16/04 | IP: (98.226.249.49) | Report this post to a Moderator

GreenGSX
One Member


Galant VR-4 org Post #: 885042 posted 03/26/10 10:05 AM     Remind Me!  Send Private Message   Edit Post      
I would suggest extending the dump tube so it blows out under the pan. Your alternator is really sensitive to hot exhaust and blowing on the front cross member might put it at risk.



click

Posts: 681 | From: Rochester, New York | Member Since: 05/15/05 | IP: (13.13.16.2) | Report this post to a Moderator

prove_it
my racist jokes aren't actually funny
715/1000
1284/2000


Galant VR-4 org Post #: 885297 posted 03/27/10 02:11 PM     Remind Me!  Send Private Message   Edit Post      
^1 agreed, even if you barely drive it, it's better to have it set up right than driving around and risking burning your car down.



#1284/2K NB, Totaled
#715/1K KG, Rebuilding
02 Acura TL daily duty unit

12yr+ Vr4 owner.
Honda/Acura master tech.
Family Guy

Posts: 4201 | From: Sioux Falls, SD | Member Since: 07/04/08 | IP: (96.2.247.30) | Report this post to a Moderator

vtecds1
linkfail
625/2000


Galant VR-4 org Post #: 885415 posted 03/27/10 09:35 PM     Remind Me!  Send Private Message   Edit Post   
I`m going to try and find a way to extend it...The po set it up in away that there is barely any room to extend the dump. As soon as I get the mani back, I will try to find a way around the problem. Thanks fellas!!!



Avoiding danger is not cowardice. Courage without discretion is no good. Or you can just say Bahala!!!


Posts: 1704 | From: Las Begas | Member Since: 01/16/04 | IP: (98.226.249.49) | Report this post to a Moderator


Pages: 1
Previous thread Next thread

Extra information
0 registered and 25 anonymous users are browsing this forum.

Galant VR4.org Moderator:  curtis, steve, atc250r, jcgalntvr4-244, cheekychimp, jepherz, Rausch, toybreaker, iceman69510, pot, FlyingEagle 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled

Rating:
Thread views: 1425

Rate this thread


News & Events: News | Events
Galant VR-4: Newbies | General VR4 Discussions | Technical Discussions | How To and Info Archive
Marketplace: Parts For Sale | Cars For Sale | Good Guys | Bad Guys
Community: Members' Showcase

Contact Us | Privacy statement GalantVR-4.org

Generated in 0.076 seconds in which 0.045 seconds were spent on a total of 14 queries. Turbo powered.


Hertz's Galant VR-4 Page