Gas Engines Questions or comments about gas engines can be posted here

ZDZ 90 or MVVS/Evoluton 80 ?

Reply
Old 12-21-2011, 05:10 PM
  #1
SJN
Thread Starter
 
Join Date: Sep 2002
Location: Copenhagen, DENMARK
Posts: 6,212
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default ZDZ 90 or MVVS/Evoluton 80 ?

Hi Gyus

I need a gas engine for a 110" 1/4 scale spitfire, and would like to hear what you guys would buy.
I want a sigle cylinder engine, so I guess these are about the only choices I have?

I like the ZDZ because it has 10cc more than the MVVS.
I also like the rotary intake valve principle.
But it does not seem to have as many cooling fins as the MVVS/EVO motor.....( dont know if it makes any difference...just guessing )


I like the MVVS/EVO because it has more cooling fins, and it weighs more......which is good in a scale plane (Again, im only guessing that the heat transfer is better than the ZDZ )
It looks like its slightly shorter from the spark plug to crank than the ZDZ, which will fit the plane easier



What do you think ?
Attached Thumbnails
Click image for larger version

Name:	Eb86606.jpg
Views:	324
Size:	67.7 KB
ID:	1703340   Click image for larger version

Name:	Lg17897.jpg
Views:	135
Size:	33.1 KB
ID:	1703341   Click image for larger version

Name:	Bg91988.jpg
Views:	96
Size:	55.7 KB
ID:	1703342  
SJN is offline  
Reply With Quote
Old 12-21-2011, 05:24 PM
  #2
aussiesteve
 
aussiesteve's Avatar
 
Join Date: Oct 2005
Location: PerthWA, AUSTRALIA
Posts: 2,924
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: ZDZ 90 or MVVS/Evoluton 80 ?



I don't have personal experience with the ZDZ 90 so can't comment on that specific engine but the predecessor was a nice engine in the hands of an operator that understood tuning and fine details of installation.

The MVVS 80 is also available in a Twinspark which produces better power than the Single spark version. Both versions are real powerhouses of an engine and very reliable and smooth (for a large single).

The MVVS must also be close to having their on board electric start version of the 80 available soon. I know it was getting pretty close not long ago.
aussiesteve is offline  
Reply With Quote
Old 12-22-2011, 12:21 AM
  #3
janch
 
Join Date: Dec 2003
Location: Praha, CZECH REPUBLIC
Posts: 260
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: ZDZ 90 or MVVS/Evoluton 80 ?

Hi ,

I have not exp. with ZDZ but with MVVS 80 I am really Happy.

http://www.youtube.com/watch?v=lO4h_sZmqf0

I have had this starter since May 2011.


janch is offline  
Reply With Quote
Old 12-22-2011, 05:48 AM
  #4
kinverflyer
 
Join Date: May 2004
Location: Wolverhampton, UNITED KINGDOM
Posts: 513
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: ZDZ 90 or MVVS/Evoluton 80 ?

The ZDZ90 would be my choice a real power house and the same size as the 80RVJ which has as much power as the 110cc twins, so the 90 would be awesome.
I have the ZDZ80RVJ in mine as that is what I had spare.
Attached Thumbnails
Click image for larger version

Name:	Ay73885.jpg
Views:	126
Size:	78.7 KB
ID:	1703517   Click image for larger version

Name:	Sn41535.jpg
Views:	67
Size:	63.8 KB
ID:	1703518  
kinverflyer is offline  
Reply With Quote
Old 12-23-2011, 05:18 AM
  #5
butlern
 
Join Date: May 2003
Location: Iowa City, Iowa (again!)
Posts: 1,470
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: ZDZ 90 or MVVS/Evoluton 80 ?

I am also considering purchasing a ZDZ 90cc for a large warbird...

Very little info, discussion or feedback out there, not even on FG.

No one has been running the ZDZ 90cc?
butlern is offline  
Reply With Quote
Old 12-23-2011, 03:53 PM
  #6
pe reivers
 
Join Date: Jan 2002
Location: Arcen, , NETHERLANDS
Posts: 6,571
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: ZDZ 90 or MVVS/Evoluton 80 ?

The starter version will be available to the publik by late January 2012.
You have been very lucky to try it out.
I just obtained their prototype to try fitting it to a 58 engine. Very nice little Bendix starter.

Quote:
ORIGINAL: janch

Hi ,

I have not exp. with ZDZ but with MVVS 80 I am really Happy.

http://www.youtube.com/watch?v=lO4h_sZmqf0

I have had this starter since May 2011.


Attached Thumbnails
Click image for larger version

Name:	By76236.jpg
Views:	186
Size:	85.7 KB
ID:	1704208  
pe reivers is offline  
Reply With Quote
Old 12-24-2011, 12:16 AM
  #7
janch
 
Join Date: Dec 2003
Location: Praha, CZECH REPUBLIC
Posts: 260
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: ZDZ 90 or MVVS/Evoluton 80 ?

Pe,

You are right.
I would like to send you my wish. Nice Christ. and The Best NY.
janch is offline  
Reply With Quote
Old 12-24-2011, 06:19 AM
  #8
SJN
Thread Starter
 
Join Date: Sep 2002
Location: Copenhagen, DENMARK
Posts: 6,212
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: ZDZ 90 or MVVS/Evoluton 80 ?

Thanks for the info guys.

I guess it will be the zdz 90.
I need all the power I can get for this large plane.

The MVVS 80 starter srstem looks great.
SJN is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 09:24 PM.