New Airflow Performance servo for the EXP119

Halleffect · #1 07-30-2023, 05:10 PM

In one of Greg Hughes' presentations at OSH, he mentioned a new fuel servo for the EXP119. I mentioned it to Chris at Lycoming Thunderbolt and he knew nothing about it. Did anyone happen to pick up any details? When does it start shipping on new engines, etc.

Carl Froehlich · #2 07-30-2023, 05:28 PM

Are you sure he was not talking about the already bigger FM-200 that they put on the EXP119? I can’t imagine that engine choking on the FM-300.

Carl

rv6ejguy · #3 07-30-2023, 07:56 PM

The 119 already uses an RSA-10 sized servo which is normally fitted to 540s. Why on earth would you need something larger than that? That's overkill for a 390 already. I doubt if there is any change in MAP above 2/3rds throttle opening.

Halleffect · #4 07-31-2023, 07:45 PM

Quote:

Originally Posted by Halleffect

In one of Greg Hughes' presentations at OSH, he mentioned a new fuel servo for the EXP119. I mentioned it to Chris at Lycoming Thunderbolt and he knew nothing about it. Did anyone happen to pick up any details? When does it start shipping on new engines, etc.

This was the only mention in the presentation.

Carl Froehlich · #5 07-31-2023, 08:18 PM

I think the confusion is about the new AirFlow Performance FM-150C and the FM-200 used on the IO-390-EXP119. Some details:
- Don at AirFlow Performance developed the FM-150C for the IO-360 and IO-390A horizontal injected engines, making it a very nice fit for the Van’s cowl. I swapped out my Precision FM for the FM-150C (IO-360-M1B) and have been enjoyed a noticeable bump in performance.
- The FM-200 was fitting on the IO-390-EXP119 engine as it this engine could benefit from the increase capacity.
- The original snorkel used across the horizontal injected engine options showed some flow limitations when fitted to the increase capacity FM-200. This provided incentive to modify the snorkel to gain back some flow - and it also provides some gain when used with the FM-150C.

I’m hopeful Van’s will soon be able to offer the new snorkel. For those yet building, I recommend specifying the FM-150C when ordering your engine from Lycoming (unless of course you are getting the IO-390-EXP119, it will come with the FM-200).

Carl

Halleffect · #6 08-01-2023, 03:02 PM

Quote:

Originally Posted by Carl Froehlich

I think the confusion is about the new AirFlow Performance FM-150C and the FM-200 used on the IO-390-EXP119. Some details:
- Don at AirFlow Performance developed the FM-150C for the IO-360 and IO-390A horizontal injected engines, making it a very nice fit for the Van’s cowl. I swapped out my Precision FM for the FM-150C (IO-360-M1B) and have been enjoyed a noticeable bump in performance.
- The FM-200 was fitting on the IO-390-EXP119 engine as it this engine could benefit from the increase capacity.
- The original snorkel used across the horizontal injected engine options showed some flow limitations when fitted to the increase capacity FM-200. This provided incentive to modify the snorkel to gain back some flow - and it also provides some gain when used with the FM-150C.

I’m hopeful Van’s will soon be able to offer the new snorkel. For those yet building, I recommend specifying the FM-150C when ordering your engine from Lycoming (unless of course you are getting the IO-390-EXP119, it will come with the FM-200).

Carl

Thanks, Carl. I'm getting an EXP119 so from what you're saying the only change for me will be a redesigned snorkel from what had been on the EXP119 up until now.

scsmith · #7 08-01-2023, 05:43 PM

One "feature" I notice on the FM-200 is that rather than having a flange on the intake side to attach air box, snorkle, ram-air system, whatever, it has a short cylindrical sleeve.

What are people doing to attach a snorkle or other to the intake side of an FM-200?

A hose clamp seems a poor choice for this, but I can't think of much else. The thought crosses my mind to make a flange that is a shrink fit onto that cylindrical sleeve.

Carl Froehlich · #8 08-01-2023, 06:21 PM

I don’t know but I assume Van’s addresses this with the snorkel kit for the RV-14.

Of note, the FM-200 has a nice inlet that can be bolted to the filter box and clamps to the FM-200 inlet.
https://airflowperformance.com/index...ch-clamp-ring/

This is what I’ll be using on the new IO-540 Cold Air Sump FM-200 inlet to James filter box. The ring goes on the inside of the filter box.

Carl

DanH · #9 08-01-2023, 07:03 PM

Quote:

Originally Posted by scsmith

What are people doing to attach a snorkle or other to the intake side of an FM-200?
A hose clamp seems a poor choice for this, but I can't think of much else.

Hose clamp locks a short section of silicone hose to the FM200, which forms a socket for the spigot on the airbox outlet. Same section of hose in both photos below.

I imagine a similar hose section would couple an FM200 to a snorkel.
.

Halleffect · #10 08-01-2023, 07:13 PM

Quote:

Originally Posted by DanH

Hose clamp locks a short section of silicone hose to the FM200, which forms a socket for the spigot on the airbox outlet. Same section of hose in both photos below.

I imagine a similar hose section would couple an FM200 to a snorkel.
.

The plans (OP 62-14) call for a 4" hose clamp on the snorkel where you cut four slots and connect directly to the fuel control. I'm also going to check into the clamp ring that Carl suggested.