• The Biplane Forum is a large global active community of biplane builders, owners and pilots. From Pitts to Skybolts, to older barnstormers, all types are welcome. In addition to our active community, our content boasts exhaustive technical information which is often sought after for projects and maintenance. This information has accumulated over the 12+ years the forum has been in existence.

    The Biplane Forum is a private community. Subscriptions are only $29.95/year to gain access to this great community and unmatched source of information not found anywhere else on the web. We are also a great resource for non biplane users, since many GA aircraft are built the same way (fabric and tube construction).

  • If you have bought, sold or gained information from our Classifieds, please donate to Biplane Forum and give back.

    You can become a Supporting Member which comes with a decal or just click here to donate.

Wanted Acro Sport 2

Daytona12

Registered Users
Joined
Oct 27, 2013
Messages
47
Reaction score
34
Hi guys, i`m looking after a acro sport 2
please contact me by pm

thanks heiko
 

GEH

Active Member
Joined
Aug 19, 2012
Messages
44
Reaction score
2
Any engine preference?


Sent from my iPad using Biplane Forum
 

Daytona12

Registered Users
Joined
Oct 27, 2013
Messages
47
Reaction score
34
i would prefer a stock-engine between 150 - 200 hp with inverted fuel and oil system to do standard aerobatics.
here in germany fuel is expensive, but there are some lycomings you can use with car gas.
so what do you think is the best engine for that ?
 

GEH

Active Member
Joined
Aug 19, 2012
Messages
44
Reaction score
2
I have a IO-320 / 150hp but no inverted systems. Can only do Acro with positive G's.


Sent from my iPad using Biplane Forum
 

GEH

Active Member
Joined
Aug 19, 2012
Messages
44
Reaction score
2
Any engine preference?


Sent from my iPad using Biplane Forum

My mechanic told me the cylinders need to be high compression to run car gas and the carb or injection system setup too. I don't have those details.


Sent from my iPad using Biplane Forum
 

TFF1

Well-Known Member
Joined
Apr 30, 2010
Messages
4,678
Reaction score
1,084
Low compression to run car gas. Not high. If the timing needs to be changed then the engine is too powerful and needs 100LL. You will loose too much HP making a high compression engine run on car gas.
 

Neil

Well-Known Member
Lifetime Supporter
Joined
Nov 10, 2006
Messages
6,598
Reaction score
1,156
Location
Monroe, Louisiana
The O360-B and O360-D have a compression ratio of 7.2:1 and I believe they are suitable for auto fuel. They are rated at 168hp.
 

Vilhelm

Well-Known Member
Supporting Member
Joined
Jan 16, 2007
Messages
517
Reaction score
87
If you really want to use auto fuel, I think you should look for an Acro Sport with the 150 HP O-320 Lycoming , which are fairly common. I am afraid that the low compression O-360 engines mentioned by Neil is rather rare engines, and I think it will be hard to find an ASII with such an engine.

Also it is not only the engine which is a concern. The complete fuel system need an evaluation, gaskets and seals will possibly not stand up to auto fuel which contains alcohol and many other strange additives
 

SteveN452

Well-Known Member
Joined
May 23, 2010
Messages
110
Reaction score
22
For what it is worth, I used Auto fuel in my Acro Sport II for many years with no problems. I stopped when they started putting ethanol in auto fuel. My 150 HP 0-320-E2D ran fine on regular Auto fuel and I would still use it if I could find a source without ethanol. I had no problems with the fuel tank or standard aircraft fuel lines. This is similar to the auto fuel STCs that were available for many planes prior to ethanol.
 

Lotahp1

Well-Known Member
Supporting Member
Joined
May 18, 2012
Messages
4,224
Reaction score
874
I ran auto fuel in a C-85 and Franklin 165hp. Personally I like 2 gallons of auto 87octane NO ETHANOL and 1 gallon of 100LL. That mix seemed to work really good. Also as a note I didn't let the auto fuel sit in the plane for extended times....if it was going to sit we simply used 100ll.


Kris
Oklahoma City,OK
Currently restoring a Ranger powered Starduster Too
 

Latest posts

Top