Bolt-on housing discussion

[Coup D E'Tat]

I'm currently running a Bullseye bolt on housing, wastegate flapper welded shut.

My original intent was to use a Hahn adapter with a .82 T3 housing. Long story short, it doesn't fit, so I'm debating on whether or not I should pick up a brand new .63 T3 housing, or a bolt-on housing. While the T3 will definetly flow more, the Hahn plate isn't the best solution for it.

Now, I really believe that the Bullseye is too small. Aside from physical and viewed measurements, it seems like it causes excess backpressure. It blew my internal gate open no matter what I tried, and power seems to fall off up top (stock intake, I know.)

Now, what I'm wondering is, does anyone have any real data comparing these to a PTE housing? The PTE is supposed to be closer to .63, but it's just a ratio, and I don't know any locals running one.

Maybe I'm way off base, but it'll make for a decent discussion.

So, anyone have any data or anything.

 

[92awddsm]

Well, its not exactly what you are looking for but my pte 60-1 (scm5252e) has the turbine housing you were talking about. I dont know the exact a/r of the housing but I was told it was really closer to .58 a/r. I doesnt flow too bad imho. It is enough for me to have 115mph trap speed on 25psi on 93 octane.

And I have yet to blow open the pte wg even at 29 psi.

 

[IPT]

Now, I really believe that the Bullseye is too small. Aside from physical and viewed measurements, it seems like it causes excess backpressure.

Have you measured the exhaust pressure? I would be curious to know what it is in the exhaust manifold compared to the intake pressure.

 

[Coup D E'Tat]

Have you measured the exhaust pressure? I would be curious to know what it is in the exhaust manifold compared to the intake pressure.

No, I haven't, but if no one has any real numbers, I probably will.