I am concerned about the wastegate placement being on runner #1. It is pretty close to the collector but from my understanding the wastegate runner needs to be fed from all four runners and at an angle at least perpendicular or symmetrically angled to the direction of the exhaust flow.

What do you more experienced guys think?

If I do need to change it my plan is to cut the wastegate runner off and patch the hole and weld a new runner right in the center of the collector.

Any advice is appreciated.

Setup is stock h22 with SC44 8psi

 

you are correct. manifolds like this are known to have the poorest wg placement. the second poorest design is one that places the wg on only 2 runners i.e. runners 1&2 or 3&4. and the best placement as you stated yourself is one that is fed by all 4 runners.

if you have the welding abilities to cut and relocate the runner for the wg i say go for it.

 

thats some of the poorest placement i have ever seen to be honest

 

I have tested out a few different wastegate setups on my pushrod motor.... Having it in a "great" spot always produced the same results as having it in a "bad" spot.

The problem with wastegate theory is.... there is just TONS of pressure in your exhaust side, and "flowing" exhaust is not really the first thing you need to worry about when 40+psi of pressure is pushing down on your exhaust valves.

I could be wrong, but I usually go with what works, and i have found bad wastegate placement works.

 

this is inaccurate.

the reason it worked was because of an inefficient turbo set up where you were probably running 3:1 back pressure or more.

in an efficient turbo set up where back pressure is 1:1 or a bit over or under, you can not simply bolt the wastegate anywhere and expect it to work, the gas is going to follow the path of least resistance, and if the wastegate is on one cyl, or a 90* angle or worse, once the exhaust gas starts moving at high velocity it's going to bypass the wastegate completely and boost will be out of control.


The larger engine/turbo guys are still quite new to the turbocharging concept and are slapping turbos on an engine that have an A/R or turbine wheel that is way too small for the application, resulting in sky high back pressure levels. Low boost can be maintained because the wastegate is being blown wide open by the forces of the exhaust gas (wastegate percentage is at 100% or over) and the fact that the pressure buildup in the turbine housing and manifold are not allowing the engine to flow freely causing a massive backup and pumping losses, limiting the boost.

 

Thanks for the input guys. I am gonna cut it off and relocate it. No sense in leaving it in a bad spot.