IO-360 Heat Muff Question

Craw · #1 12-07-2021, 12:43 PM

Good Afternoon All,
I'm currently planning on installing an IO-360-A1B6 in my RV-7A and would like to install two heat muffs. I'm wondering if anyone has already installed this configuration and has any pictures or gotchas to share based on experience.

The ideal scenario for me would be a vetterman 2-1 exhaust and 1 heat muff each side, however, I don't know if enough room exists to support this setup.

The winters in Canada are pretty cold so I think two heat muffs are a must for me (already going with heated seats).

Cheers,

upperdeck · #2 12-07-2021, 02:13 PM

I have this setup with two heat muff run in series. I'm happy with the temp of the heat output, but the volume is a bit anemic.

Craw · #3 12-07-2021, 02:18 PM

When you say "run in series" do you mean the output of the first heat muff flows into the input of the second heat muff and then into the cabin? If you have a picture of the firewall forward config I would love to see it.

Thanks again for your feedback

rapid_ascent · #4 12-07-2021, 03:03 PM

The "In series" is an electrical term but yes that would mean the output of one running to the input of the second.

I believe you should be fine with this configuration. You should reach out to Vetterman to confirm though. They seem to have a pretty good handle on all the different engine configurations and exhaust systems that work with them.

upperdeck · #5 12-07-2021, 03:19 PM

that's exactly what I meant by "in series." There's plenty of room to route the hoses around.

I also went with heated seats and love them!

Darin Watson · #6 12-07-2021, 03:46 PM

Two in series with six rows of “fins”…about as good as it gets

Dave S · #7 12-07-2021, 06:43 PM

Darin,

Where did you come up with the fins? I have a -7 with the Vetterman exhaust. Not quit as cold as you, but still gets chilly down south here in Minnesota. Seems like might be a great idea to add to mine while I'm still in the installation process.

would mind sharing the plans?

Thanks

agent4573 · #8 12-10-2021, 01:14 PM

Quote:

Originally Posted by Darin Watson

Two in series with six rows of “fins”…about as good as it gets

There's 7 rows of fins though.....

Darin Watson · #9 12-11-2021, 08:21 PM

I will have to dig for the plans, having the laser cut pieces were fairly in expensive.

I know the photo shows 7 rows as I was playing around with the volume vs temperature trade offs and ended with 6 per muff.

SonexGuy · #10 12-11-2021, 08:35 PM

I used 2 of these in line and they work well. Certainly better than my few custom attempts over a couple of years. The restrictors allow you to vary air flow to find what works for your setup.

https://www.aircraftspruce.com/catal...at05-15249.php