IO-375 Pros/Cons

704CH · #1 12-20-2010, 03:15 PM

Hey guys, I wanted to ask thoughts about pros/cons of the 375 from Aerosport. Any recent updates from those flying with specifics, there should be a few of you out there.

My understanding is this is a 360 with a longer stroke providing more than the 180 hp, you can get 195 or 205 depending on the compression. Also, no roller tappets on this one. Same size/shape mounts, uses same prop etc..

So what does this mean to the engine and TBO? Same amount of Metal producing 15-25 more hp ?

I would assume more friction in general due to the loner stroke.. Which means more heat and more wear right? Also, you have a heavier crank that is turning since you have longer stroke. What does all this mean?

Pardon my ignorance but I am at the early stages of looking at engines and wanted to get thoughts or feedback from owners.

Thx

UnPossible · #2 12-20-2010, 03:45 PM

I ordered a IO-375 at Osh Kosh this year....can't comment on its operation yet.

FYI - I ordered mine with Lycoming cylindars and roller tappets.... I think the up charge was around $2k.

CZ75shooter · #3 12-20-2010, 09:38 PM

I only have about 30 hrs. on a 0-375 with 205 HP in a 7A. Aero-sport, you won't find better folks to deal with. 3 blade Catto turns what Craig said it would.

I'm still tweaking the airframe, have the wheel pants and fairings on. I'm seeing about 210 MPH wide open now at 1000' AGL. (Afraid of heights) I think someone with a cleaner and straighter air frame would see even more. Engine runs great, oil temps a little high at first, but now about 180-210 depending on OAT, CHT about 330-340

I really like mine. I was flying a 9A with a 0-320 that I built 9 years and 900 hrs. ago. The biggest shock for me was the increased fuel flow. (What is that old saying, how fast can you afford to go?)

Larry

Ron Lee · #4 12-20-2010, 09:41 PM

Quote:

Originally Posted by CZ75shooter

The biggest shock for me was the increased fuel flow. (What is that old saying, how fast can you afford to go?)

Fly high....save fuel

David Z · #5 12-20-2010, 09:54 PM

How much fuel does it burn at, 65% or 75% running ROP?

CZ75shooter · #6 12-21-2010, 06:46 AM

I have two 10" skyviews, but I don't have the red cube yet to measure fuel flow. I've never had a plane before with EGT and CHT, so I haven't started experimenting with the correct % of power yet. Before I just pulled the mixture until it started running rough and slowed up a little , then pushed it back in a little. (I'm from the stone age)

Jason is correct about the roller tappets. Bart said that I could upgrade to the roller tappets but I didn't.

Larry

N200PF · #7 12-22-2010, 03:48 PM

The IO-375-M1S from Bart and Sue at Aero Sport is one of the best decisions I made on the entire airplane! Smooth as glass and just over 200 HP with 8.0:1 pistons. (yes that's right, 8.0:1) I'm running horizontal induction with the Superior cold air sump and dual P-Mags.

The speed box average for my -7 at 8500 is 184.75 kts. (Whirlwind 200RV prop) That's 212.46 mph in case you don't have a calculator handy.

Aside from the fact that the engine performs GREAT, Aero Sport could not be better to work with! They are always there to help and are just super people!

The real question: If I build another one, would I buy the same engine?
Answer: Without even thinking about it!!!

- Peter

Sig600 · #8 12-22-2010, 03:54 PM

You just needed the power to haul that panel around!!!

Flyingguido · #9 12-22-2010, 03:56 PM

Peter,
What do you figure on for the weight, with accessories, of the engine?
Thanks!

N200PF · #10 12-22-2010, 09:35 PM

Quote:

Originally Posted by Sig600

You just needed the power to haul that panel around!!!

...and your question is?!?

Yeah I saved weight where I could so the panel could weigh a bit more than average. My empty was 1133. I'll take it based on everything that ended up in this bird.

- Peter