opinions on this wastegate setup?
 

I've never seen this before, pros/cons of this setup?

seen a lot of disels set up like that. not sure how it would act on a rotary though

kenn

It does look like it could vent well but at the same time, it looks like the turbine could draw the exhaust gases back in with a vacuum like suction.

its a on center housing... and they suck.

i have no clue on the WG flange placement tho other then why? why put it there... manifolds come with a place for a WG.

theres many reasons to put it there
Setzep i think his name is did it awhile ago while trying to control his boost creep issues
send him a pm

That style housing won't work on an Fd anyway. At least with the normal HKS manifold. Most people need a tang style housing to keep it from hitting the strut tower.
Interesting though.

OOps...just realized you have an FC. But still might not work.

I have an FC, not an FD. I know what type of housing it is, and it's advantages and disadvantages. What I am wondering is the advantages and disadvantages of this particular wastegate set-up. It seems that it would respond very quickly and would simplify the production of a manifold. Also if it were aligned so that the wastegate discharge pointed in the same direction as the turbine discharge, plumbing in the wastegate would be convenient and wouldn't disturb the exhaust flow much because of how it would enter the DP.

One disadvantage may be that it would get hot, but I think it would actually be cooler there than say where the HKS cast puts it. And there would be a lot of air flow around it to help with cooling. Maybe add a stainless heatshield (slightly modified) to help even further.

edit

i like it! ........ gives me an idea actually :D

That WG set-up can work well if properly done...

Which that example is NOT!

Because the exhaust gasses will have MUCH greater velocity and therefore inertia in the turbo scolls volute runner than in exhaust manifold it is harder to get it to turn away from a straight line of travel into the WG.

If you put your WG on the turbine you MUST position the WG entry so that it is close to inline with the straight section of a tangental exhaust housing. This basically makes it a straight shot out the WG or a bend to continue down the turbo volute.

This position will give you very good boost control on even a small(ish) WG as the increased velocity is working for you to force the gasses out the WG.

As mentioned Setzup put his WG on the turbo housing and had to port the WG entry to make it as I described in order to get it to work without boost creep.

side question:

would a 38mm Tial be sufficient enough for a T4 Blowzilla or a PT63 on a streetported engine? mounted in the typical fashion on the manifold? I know there may be other variables but I'm unsure of what to use as a guidline.