Van's Air Force
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Which FAB?
- Thread starter claycookiemonster
- Start date
claycookiemonster
Well Known Member
Good reply.
Showplanes RV-8 cowl.
Showplanes RV-8 cowl.
pazmanyflyer
Well Known Member
Horizontal induction needs this to fit the smooth cowls.
https://store.vansaircraft.com/filtered-airbox-io-360-180-200hp-fab-horiz-induction-2.html
https://store.vansaircraft.com/filtered-airbox-io-360-180-200hp-fab-horiz-induction-2.html
claycookiemonster
Well Known Member
Round or Square? I need square.
Yes to the horizontal induction and curved intake duct to reach the FAB. I understand that. My question is about mating the FAB to the engine. My superior intake has a 4" square forward mating surface where the FAB will mount. Apparently that may not be "standard" to all generic IO-360 installations. I have heard that I may need the RV-14 FAB because it will mate to my intake.
Which FAB will have a 4" square aft end where it mates to the intake?
Yes to the horizontal induction and curved intake duct to reach the FAB. I understand that. My question is about mating the FAB to the engine. My superior intake has a 4" square forward mating surface where the FAB will mount. Apparently that may not be "standard" to all generic IO-360 installations. I have heard that I may need the RV-14 FAB because it will mate to my intake.
Which FAB will have a 4" square aft end where it mates to the intake?
Clay I think you may be mixing different products/applications. If you have a horizontal induction sump, pazmanyflyer post is correct.
There is no FAB on a standard horizontal setup. Instead you need the "snorkel" and smooth cowl (no scoop), with the air filter cut into to left forward ramp of the baffles behind the prop. The snorkel flange is round to allow clocking to fit your FI Servo bolt pattern. Once the bolt holes are drilled in the fiberglass flange you can trim the fiberglass "circle" to match the "square" servo.
There is no FAB on a standard horizontal setup. Instead you need the "snorkel" and smooth cowl (no scoop), with the air filter cut into to left forward ramp of the baffles behind the prop. The snorkel flange is round to allow clocking to fit your FI Servo bolt pattern. Once the bolt holes are drilled in the fiberglass flange you can trim the fiberglass "circle" to match the "square" servo.
wirejock
Well Known Member
Frankensnorkel
My IO-360-M1B has a square servo flange. The Frankensnorkel comes with a round flange. As John mentioned, it's drilled then trimmed. A plug matching the servo hole is used to keep the Frankensnorkel centered till it is fit. Many of us cut the thing in half and fit either end then glass it back together.
My IO-360-M1B has a square servo flange. The Frankensnorkel comes with a round flange. As John mentioned, it's drilled then trimmed. A plug matching the servo hole is used to keep the Frankensnorkel centered till it is fit. Many of us cut the thing in half and fit either end then glass it back together.
claycookiemonster
Well Known Member
This place is priceless. Yes, now I see. The serpentine duct to reach the front of the intake from the left intake. Mixing my apples and oranges again.
RV8JD
Well Known Member
Part of the confusion may be that Van's does call the snorkel a FAB also (a FAB for Horizontal Induction systems). Snippet from their web store below. They do use 'snorkel' once in the description text, but 'FAB' in a few places
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FAB... Filtered Air Box
On an RV, none of them are actually a "box", but it is a term that has been used for aircraft for many decades.
So FAB correctly corresponds to all of the systems sold at Van's.
On an RV, none of them are actually a "box", but it is a term that has been used for aircraft for many decades.
So FAB correctly corresponds to all of the systems sold at Van's.
claycookiemonster
Well Known Member
It's all becoming clear to me now...
Yes, yes. The Snorkel/FAB arrived today. One glance makes it clear. Yes, the engine end in round, but the central hole matches the central hole in the square mounting surface.
Ok, one more question: How do I put an alternate air source in this thing?
Yes, yes. The Snorkel/FAB arrived today. One glance makes it clear. Yes, the engine end in round, but the central hole matches the central hole in the square mounting surface.
Ok, one more question: How do I put an alternate air source in this thing?
wirejock
Well Known Member
Alt air
There is supposed to be an alt air kit included. If not you may want to order it.
There are lots of alternate air mods but the Vans method works just fine. It's a round flange with a plate hinged at one point with a bolt. When you pull the Bowden cable, it slides open. Mine works very smooth.
VA-192A & VA-192B
There is supposed to be an alt air kit included. If not you may want to order it.
There are lots of alternate air mods but the Vans method works just fine. It's a round flange with a plate hinged at one point with a bolt. When you pull the Bowden cable, it slides open. Mine works very smooth.
VA-192A & VA-192B
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claycookiemonster
Well Known Member
Got it! Yes, all the parts for the aux air intake were packed into the snorkel.
Clay,
Depending on what starter you have, it may be necessary to "trim" the snorkel, (hence it's rename the Frankensnorkel).
I have a B&C and it interfered.
I also enlarged the round hole so it matched the opening of the EFII S32 throttle body, but that's another story.
See attached photos.
Depending on what starter you have, it may be necessary to "trim" the snorkel, (hence it's rename the Frankensnorkel).
I have a B&C and it interfered.
I also enlarged the round hole so it matched the opening of the EFII S32 throttle body, but that's another story.
See attached photos.
Attachments
Hey Larry, I chose not to rivet the aluminum to the top of the Frankenstein snorkel for fear of if any of the rivets get lose and fall in then they get sucked right into the engine. My filter fits super tight and there is no movement of the snorkel. Thoughts?
