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Old 02-05-2013, 09:34 PM
Flyin' Around
JKimberly's Avatar
United States, AL, Warrior
Joined Dec 2012
10 Posts

Thanks Steve, that makes sense about having equal pressure around the circumfrence of the fuel line. Looks like I have my work cut out for me when I return home.

Jkosh, Thanks for sharing the video. Yes it does seem under powered but as he said it is a new engine. I'm sure it performed better once the engine was broke in.
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Old 02-06-2013, 04:06 AM
Bad-ass Super Contributor!
pe reivers's Avatar
The netherlands
Joined Apr 2007
2,235 Posts

Quote:
Originally Posted by orthobird View Post
also, you do not want to tune engine to max rpm, as PE REIVERS has mentioned. if possible, use a tach, once you get max rpm, then open needle bit more to richen it so RPM decreases by 100 rpm or so. reason being, among other things, is that once plane is up in air, and different loads are applied to prop, the engine may work more and get hotter at times, then it may lean out to some extent, so you want to be ahead of that curve. you do not want it to be lean, and then lean more up in air, then you get dead stick.
This is true for glow engines which lean out in flight. Not so for gas engines with pumper carbs, which are already set quite rich if on the verge of rpm drop.
Get rid of that 100 rpm drop myth please.
Now, if you hurt your engine by lack of cooling, the extra rich setting which causes rpm drop will save the day, because of the extra internal cooling you provide. Here the error is in the cooling , to be corrected by carb settings.

To all:
MVVS engines do not gain rpm when running in, due to the special slippery piston coating. They also do gain nothing by using less oil than 1:40. best power is at 1:33 (3% oil)
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Old 02-06-2013, 03:12 PM
older than dirt,
antique's Avatar
United States, AZ, Williams
Joined Aug 2007
1,799 Posts

From THE expert on MVVS, anyone else is guessing
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Old 02-06-2013, 04:16 PM
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aussiesteve's Avatar
Australia, VIC, Sale
Joined May 2008
2,120 Posts

Quote:
Originally Posted by antique View Post
From THE expert on MVVS, anyone else is guessing
+ many (because 1 is not enough)

Pe is without a doubt the authority on MVVS (and most other engines in fact as the principles remain the same for most) and he is part of the reason that my signature line discusses supplier quality. (you Ralph are another reason for the immense support you have given your products over the years). My own experiences have also taught me that Pe knows more about the practicalities of the brand than the factory itself.

People such as Pe & Ralph (and DA - because this is FG after all ) who make the effort to learn their products inside and out can then provide accurate and proper support - it makes a HUGE difference to the end users and they should be the ones we support when making a purchasing decision because it is likely to be them who we turn to for help later.
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Old 02-07-2013, 07:08 AM
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pe reivers's Avatar
The netherlands
Joined Apr 2007
2,235 Posts



Thanks guys.
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Old 02-07-2013, 10:18 PM
Gettin' Lower!
Ελλάδα, Αθήνα
Joined Mar 2010
92 Posts

Hear, hear.

Accurate, relevant advice always from the aforementioned gentlemen.
An asset to our hobby.

mike
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