VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #1  
Old 06-04-2018, 06:01 PM
n38139's Avatar
n38139 n38139 is offline
 
Join Date: Jun 2005
Posts: 558
Default RV-8 With a IO320

Anybody have any experience with a RV-8 and an IO320? I have a friend that wants to sell one. It also has a constant speed prop.

thanks
__________________
Steve
Reply With Quote
  #2  
Old 06-06-2018, 07:10 AM
Capt Capt is offline
 
Join Date: Feb 2017
Location: Australia
Posts: 185
Default

Sounds like a nice combo, bit lighter as well. If you run the 320 hard as in 75% then you would be close to a 360's output anyway running less then 75%. It's all about fuel & ROC when it comes to a larger bore engine, outright speed isn't a huge difference I have found anyway with other airframes:-)
I run my 8 (IO360 CS) around 55% Pwr 27-28 lph for 150 Kts TAS up high. There's no hurry in life, there's always tomorrow

Last edited by Capt : 06-06-2018 at 07:14 AM.
Reply With Quote
  #3  
Old 06-06-2018, 07:19 AM
Low Pass's Avatar
Low Pass Low Pass is offline
 
Join Date: May 2006
Location: Houston
Posts: 1,891
Default

Quote:
Originally Posted by n38139 View Post
Anybody have any experience with a RV-8 and an IO320? I have a friend that wants to sell one. It also has a constant speed prop.

thanks
I flew behind an IO-320 with a CS prop for many years. The only time you'll really notice is when you're flying with other RV owners who have bigger engines that won't wait on you. My *good* buddies pulled it back an inch or two and waited on me...
__________________
Bryan

Houston

Last edited by Low Pass : 06-06-2018 at 07:21 AM.
Reply With Quote
  #4  
Old 06-06-2018, 08:32 AM
SMRacer SMRacer is offline
 
Join Date: Feb 2012
Location: Leesburg, VA
Posts: 392
Default Resale value

The only experience your friend will be interested in is resale value. I have watched the RV8 market for years and most RV8s with a 320 will sell for significantly less than one with a 360. (Same for RV6s, and RV7s, and yes, I know there are exceptions to this)

Bottom line is that a 360 can do anything a 320 can do, but a 320 can't do things a 360 can do.

And in real life examples, a buddy of mine is just finishing a conversion of his RV8 from a 320 to a 360.
__________________
Jim
Leesburg, VA
RV4 N444JT (sold)
RV8 N37PK
Reply With Quote
  #5  
Old 06-06-2018, 08:52 AM
Mach.26's Avatar
Mach.26 Mach.26 is offline
 
Join Date: Jan 2017
Location: Ozark, AL
Posts: 50
Default

You could get it and spruce it up with the I0-340 parts that Cub Crafters uses on their lightweight engines. If you did that and a composite prop I would imagine you would have a power to weight ratio better than a stock 360
__________________
Adam Wright
RV-8 Builder 83611
Reply With Quote
  #6  
Old 06-06-2018, 10:06 AM
Kahuna's Avatar
Kahuna Kahuna is offline
Whelen LED Light Man
 
Join Date: Dec 2004
Location: Gold Hill, NC25
Posts: 2,374
Default

I have flown 2 RV-8's with an 0-320. First flights actually.
1 Built by a guy on a budget. Got the engine for free. This was a bare bones build just to get her flying. It was awful. And I imagine it would be even more awful with a pax. Not sure I would even fly one with a pax. Light yes. Flew yes. Fun no. He soon swapped out the engine for a 360 for reasons you would expect.

Dont know what happened to the other one.

Both exerted the same performance. awful.
Reply With Quote
  #7  
Old 06-06-2018, 12:49 PM
RV6_flyer's Avatar
RV6_flyer RV6_flyer is offline
 
Join Date: Jan 2005
Location: NC25
Posts: 2,920
Default

Quote:
Originally Posted by SMRacer View Post
The only experience your friend will be interested in is resale value. I have watched the RV8 market for years and most RV8s with a 320 will sell for significantly less than one with a 360. (Same for RV6s, and RV7s, and yes, I know there are exceptions to this)

Bottom line is that a 360 can do anything a 320 can do, but a 320 can't do things a 360 can do.

And in real life examples, a buddy of mine is just finishing a conversion of his RV8 from a 320 to a 360.
Quote:
Originally Posted by Kahuna View Post
I have flown 2 RV-8's with an 0-320. First flights actually.
1 Built by a guy on a budget. Got the engine for free. This was a bare bones build just to get her flying. It was awful. And I imagine it would be even more awful with a pax. Not sure I would even fly one with a pax. Light yes. Flew yes. Fun no. He soon swapped out the engine for a 360 for reasons you would expect.

Dont know what happened to the other one.

Both exerted the same performance. awful.
Ask anyone with as many hours as I have behind a 320 powered two seat RV and they will tell you to get the 360. As Jim said, the 360 will do anything the 320 will but the 320 will not do what the 360 can.

I have run with 10:1 match flowed blueprinted 320 and it will not do what the stock 360 can. According to the Type Certificate Data Sheet, the 360 is 10 pounds heaver but the 20 extra horses always does better than a 320 pumped up and turning 2,900 RPM.
__________________
Gary A. Sobek
NC25 RV-6
Flying
3,300+ hours
Building RV-8 S/N: 80012

To most people, the sky is the limit.
To those who love aviation, the sky is home.
Reply With Quote
  #8  
Old 06-06-2018, 06:52 PM
Capt Capt is offline
 
Join Date: Feb 2017
Location: Australia
Posts: 185
Default

Well there you have it, doesn't seem the 320 fares well opinion wise. Good point already mentioned about resale value, must admit when I was looking for an 8 I didn't even stop to look at a 320 or even FP prop in any combo, but that was personal choice.
I have a friend who has a 4 with a 160HP IO320 FP & even though the 4 is a diff beast it goes like a scolded cat!
Reply With Quote
  #9  
Old 06-06-2018, 08:20 PM
Dbro172's Avatar
Dbro172 Dbro172 is offline
 
Join Date: Apr 2012
Location: West Fargo, ND
Posts: 1,013
Default

Will it perform as well as an O-360, obviously knot. Will it be better than an 0-320, RV-6,7,9; probably so. Those narrow bodies haul but. Put a light two blade whirlwind constant speed on and it should be a nice flying bird. Will it be better than any O-320 certified craft (Cherokee, skyhawk), for sure. Quote “an O-320 RV-8 is not underpowered”.
__________________
Derek Hoeschen
EAA Tech Counselor
RV-9A #92103 - N803DK
G3X, Superior XO-320, Dual Pmags, Catto 3B
www.mykitlog.com/dbro172/

RV-8 #83565 - N184DK - building
1968 Mooney M20C - Sold
1956 C-182 - Sold
Reply With Quote
  #10  
Old 06-06-2018, 08:29 PM
Jpm757 Jpm757 is offline
 
Join Date: May 2013
Location: Sherman, CT
Posts: 179
Default

If you are considering this bird you may want to do a little research into the engine. Is it a factory IO, or a converted one? The certified IO-320 has become somewhat of a rare engine, with possibly conical mounts, front mounted prop governor, lightening hole crank flange and a variety of sump configurations. Some of these engines had 7:00 to 1 compression for 80/87 fuel, additionally parts can be scarce. Since the -7 and -8 we're really designed around the 180-200 hp engines for the higher gross weights. I agree you would take a hit on resale.
__________________
Jake
RV6 completed 1991 sold.
RV7 #72018 N767T first flight 11/21/2017 100+hrs.
IO-360M1B MT 3 blade, Dual AFS 5600.
2018 dues paid.
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 06:09 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.