Re: Finally getting stuff done on our cars
 

Spool isn't the problem, it's averting enough exhaust gases away from the turbo to keep the boost at a steady level. With a divided manifold and a single gate, the turbo is seeing less exhaust pressure from two of the runners than the other two. A single wastegate on a tubular manifold is usually plumbed into a merged collector, not a divided. This is similar to the way Buschur used to weld an HKS external on the number one runner of a stock manifold or the old cast T3 manifolds. I'm guessing this will cause some erratic boost control with this size turbo, but practice outweighs theory everytime. We'll see how it comes out. It shouldn't be that tough to add another wastegate later.

Re: Finally getting stuff done on our cars
 

Id be worried with high back pressure on 2-3 and low back pressure on 1-4. When the wastgate is open. But like Steve said people have been running gates of the #1 cly forever. I would try to do a single setup like in these attached pics.

Re: Finally getting stuff done on our cars
 

Yeah, it should be fine. how big is the plunger/valve on the greddy type R?

Re: Finally getting stuff done on our cars
 

Sweet! i am impressed with the way the Galant is setup.

Re: Finally getting stuff done on our cars
 

I did plan on running the waste gate off the two collectors right befor the turbo and weld in a divider so there would be only a little cross over with the #1/4 to the #2/3. My thought is this turbo is huge, big, massive, the #1/4 will be full bore on the turbo but the #2/3 would have exhaust gas energy wasted. So I do not know how well a 1liter 2cylender motor would spool/keep a GT4202 spinning, 2 waste gates it is I guess.

~John

Re: Finally getting stuff done on our cars
 

There is another way. :sasmokin:

Re: Finally getting stuff done on our cars
 

I thought of that as well. Unfortunately, that would defeat the purpse of keeping the runners separated.

Re: Finally getting stuff done on our cars
 

Not really unless you're running real low boost.

Re: Finally getting stuff done on our cars
 

That was my first plan, I do have room under the turbo or under the primary runners, we will see. I would have it divided all the way to the bottom of the valve seat, which should be close enough.

~John

Re: Finally getting stuff done on our cars
 

Your only gonna run the gate off 1 side of the collector??

Re: Finally getting stuff done on our cars
 

It was an idea, but I will put two 38s and be done with it, so it will be a true divided manifold.

~John

Re: Finally getting stuff done on our cars
 

When, oh, when will Josh Swanberg finally release his choice in turbo/turbos?

Re: Finally getting stuff done on our cars
 

Once we are done testing and get some track times, I will release my new setup information.

Re: Finally getting stuff done on our cars
 

Sounds like there are some expectations. Is there a particular reason why you wouldn't release the information? In the past, you have been quite boisterous about the setup.

Re: Finally getting stuff done on our cars
 

Dual 2G DSM T25s with a 900 shot of NAWZ.

Re: Finally getting stuff done on our cars
 

^^^ Who told?!?!

Re: Finally getting stuff done on our cars
 

Dammit you promised you wouldn't tell!

Re: Finally getting stuff done on our cars
 

Motha fucka!!! Now everyone will know and swanny won't be shit.
Sucks for you. Well at least rst will be there for ya. he seems a little interested in your setup these days.

Re: Finally getting stuff done on our cars
 

Alright I will tell you what I am running.

Twin tial 38mm wastegates with leaded valves and a tial BOV.

All in blue.

Re: Finally getting stuff done on our cars
 

I know I know, You switched the internally gated exhaust housings for non-internally gated ones. You sly dog you.