Holset velocity stack
#1
Rotary Freak
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Holset velocity stack
It seemed like the inlet to my turbo wasn't really optimized for flow, so I decided to whip up a quick velocity stack ring for the anti-surge housing.. Not sure how much it helped but it's removable so I can do back to back testing at some point.
Drilling holes.
Ready to part.
Rough inlet angles cut.
After finishing inlet stack.
Backside machine work.
Ready to drop into housing.
Drilling holes.
Ready to part.
Rough inlet angles cut.
After finishing inlet stack.
Backside machine work.
Ready to drop into housing.
#2
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Nobody like a show-off Aaron, especially with your fancy machining tool!! ;-)
All kiddin aside, it looks very well-thoughout and just plain cool, so I'll await your furthering success stories.
All kiddin aside, it looks very well-thoughout and just plain cool, so I'll await your furthering success stories.
#3
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Very nice work, looks pretty, quality craftsmanship.
I am not sure if it will actually do anything as the opening on the Holset is pretty wide and short... FWIW though It looks like something I would obsess over and do if I had the time/tools .
You don't think the ring will be forced out when you let off the throttle from air coming back through the anti surge shroud do you? or is it pressed in there pretty tight?
+1 on wanting to see success stories!
I am not sure if it will actually do anything as the opening on the Holset is pretty wide and short... FWIW though It looks like something I would obsess over and do if I had the time/tools .
You don't think the ring will be forced out when you let off the throttle from air coming back through the anti surge shroud do you? or is it pressed in there pretty tight?
+1 on wanting to see success stories!
#5
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Thanks guys! Yeah, I'm not too sure it'll do anything either, but I had an itch to make it, so I did..
It's basically pressed in so will require some major effort for when/if I decide to remove it.
I want to start taking more pictures of the little things I've been working on, so should hopefully have some more good stuff to post soon.
It's basically pressed in so will require some major effort for when/if I decide to remove it.
I want to start taking more pictures of the little things I've been working on, so should hopefully have some more good stuff to post soon.
#7
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You should do like all of us rotary-narcissist, and start you own <forgive the military term> "I Love Me" thread. I'll even throw out a title for your consideration: Aaron Innnovation Funhouse!
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#9
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Thanks guys! Yeah, I'm not too sure it'll do anything either, but I had an itch to make it, so I did..
It's basically pressed in so will require some major effort for when/if I decide to remove it.
I want to start taking more pictures of the little things I've been working on, so should hopefully have some more good stuff to post soon.
It's basically pressed in so will require some major effort for when/if I decide to remove it.
I want to start taking more pictures of the little things I've been working on, so should hopefully have some more good stuff to post soon.
Looks good! What are the radii of the diameter and the opening?
I'm in Gilbert. Where is your shop?
GD
#10
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I'm not sure I know exactly what you mean...? The velocity stack radius I finished by hand, but I'm guessing somewhere around .75 to 1" radius. The inlet opening diameter is ~2.4", and the outer diameter of the ring is ~3.6". Hope that answers your question.
I work at YawPower/Injector Dynamics in Phoenix.
I work at YawPower/Injector Dynamics in Phoenix.
#13
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Your idea is way better than mine. But here's what I did to my Holsett (not trying to thread jack, just bored)
Beveled and radius the inlet and removed as much material as possible. The intake attaches to just the main inlet with a velocity stack on the end of that.
Stock:
Modded:
Did this to a friends GT28, he noticed a faster spool up. Have not tested this one yet.
Beveled and radius the inlet and removed as much material as possible. The intake attaches to just the main inlet with a velocity stack on the end of that.
Stock:
Modded:
Did this to a friends GT28, he noticed a faster spool up. Have not tested this one yet.
#14
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Looks good! Unfortunately my lathe isn't large enough to get the entire housing chucked up.. I would've liked to taper further down on the inlet like you did, but I drove the car to the shop that day and was running out of time.
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I have done alot fo flow work where I used to work and we used exclusively "3-D " orifice nozzles. The length of the straight section is the diameter, and the radii is also the radius of the opening opening dimension.
That anti surge opening looks like it could kill a ton of velocity. Can you plug it off since you have the ability to install a BOV?
GD
That anti surge opening looks like it could kill a ton of velocity. Can you plug it off since you have the ability to install a BOV?
GD
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