RE: Hi Perf Russian 10cc at a bargain price!  
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RE: Hi Perf Russian 10cc at a bargain price! - 2/25/2008 7:33:39 PM   
MJD


 

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From: Orangeville, ON, CANADA
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quote:

ORIGINAL: bob27s

any chance they chose to use a bearing retaining compound for some reason ??

How did things fit up after reassembly ?


I have the same suspicion that they use an anaerobic compound on the bearings. Seeing as QC and/or the perception thereof is certainly a factor in the make or break of a product, and often the first thing that pops to mind with products from some areas of the world especially, they either (a) do it as standard practice, or (b) have some concern over production fits.

I know we know they are meant for low nitro, but just as a reminder I don't think you should exceed 5% with these. An MDS .48 was the first engine I had run - in the usual .25-.61 sport engine range - that showed immediate obvious signs of displeasure in stock head trim with 15%. So methinks MDS engines are not conservative in the compression ratio department.

MJD

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RE: Hi Perf Russian 10cc at a bargain price! - 2/25/2008 8:09:24 PM   
daven



Posts: 6922
Joined: 12/7/2001
From: Andover, MN, USA
Status: offline 		I added 2 additional head shims (they came with the motor) making it 3 total. I didn't mic them, but they appeared to be some where around .005 each. I only run one fuel, and thats Powermaster 15% NITRO, so we'll see how it does with that. If I have to raise the head more, I will.

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RE: Hi Perf Russian 10cc at a bargain price! - 2/25/2008 10:10:13 PM   
Flyboy Dave



Posts: 13468
Joined: 3/20/2002
From: San Bernardino County, CA, USA
Status: offline 		If the engine is designed to run on zero nitro, it's probably a high-comp engine. I think
I would have put all the shims in. The high-comp and the possible questionable metallurgy
may be responsible for the broken rods and crankshafts in the early MDS engines. I use
15% PM fuel for the most part as well, but I also use 5% in the Rossi's and 20/20 in the
YS engines....all PowerMaster.

The figures Kmot got were not impressive, but he had the makeshift exhaust on it.
You really have to run it open pipe to see what you have.

FBD.

< Message edited by Flyboy Dave -- 2/25/2008 10:11:07 PM >

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RE: Hi Perf Russian 10cc at a bargain price! - 2/26/2008 12:47:51 AM   
Kmot



Posts: 7745
Joined: 6/11/2003
From: Northridge, CA, USA
Status: offline 		Also, it is far from being broken in. It only has 20 minutes on it so far. I expect the power will increase a tad as it get more and more broken in.

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RE: Hi Perf Russian 10cc at a bargain price! - 2/26/2008 2:45:04 AM   
daven



Posts: 6922
Joined: 12/7/2001
From: Andover, MN, USA
Status: offline 		I also thought the exhaust was constrictive, as well as running it rich with 80/20 fuel.

I think this motor has potential, just not sure it will be consistent from motor to motor.

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RE: Hi Perf Russian 10cc at a bargain price! - 2/26/2008 3:02:41 AM   
daven



Posts: 6922
Joined: 12/7/2001
From: Andover, MN, USA
Status: offline 		Found a spinner nut for it today. 8mm x 1.25 from Dubro in Black.

Fits nice, and should do a good job.

Weighed the motor tonight, and it came in at 20.4 oz as it looks in the picture with prop nut and prop.

Attachments
Click to see fullsize image.
Click for fullsize


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RE: Hi Perf Russian 10cc at a bargain price! - 2/26/2008 3:32:57 AM   
Kmot



Posts: 7745
Joined: 6/11/2003
From: Northridge, CA, USA
Status: offline 		I like that prop nut, it looks really good! Pricey little sucker though!

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RE: Hi Perf Russian 10cc at a bargain price! - 2/26/2008 3:40:33 AM   
rainedave



Posts: 5198
Joined: 7/21/2005
From: Greensboro, NC, USA
Status: online 		FYI, Sheldon's is selling off a bunch of their NOS Mac's headers and pipes you-know-where. Some of the Mac's 10cc RE headers are as little as $9.99 Buy Now. I'm sure there's one in there that will fit this engine.

http://stores.ebay.com/SheldonsHobbies_HEADERS-PIPES-MUFFLERS_W0QQcolZ4QQdirZ1QQfsubZ18531897QQftidZ2QQtZkm

David

< Message edited by rainedave -- 2/26/2008 3:43:09 AM >

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RE: Hi Perf Russian 10cc at a bargain price! - 2/26/2008 1:46:45 PM   
MJD


 

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From: Orangeville, ON, CANADA
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quote:

ORIGINAL: rainedave

FYI, Sheldon's is selling off a bunch of their NOS Mac's headers and pipes you-know-where. Some of the Mac's 10cc RE headers are as little as $9.99 Buy Now. I'm sure there's one in there that will fit this engine.

http://stores.ebay.com/SheldonsHobbies_HEADERS-PIPES-MUFFLERS_W0QQcolZ4QQdirZ1QQfsubZ18531897QQftidZ2QQtZkm

David


Mine came with a stub adapter with internal o-ring groove, and only need a header/riser tube. Did this one have one?

RD - good link/tip, thanks!

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RE: Hi Perf Russian 10cc at a bargain price! - 2/26/2008 4:19:11 PM   
Kmot



Posts: 7745
Joined: 6/11/2003
From: Northridge, CA, USA
Status: offline 		Yes MJD, these come with the stub designed for internal header tube.

I looked over the Sheldons 'blow out' and did not find anything that was a particularly good deal. The pricing is just about normal everyday prices on the various headers.

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RE: Hi Perf Russian 10cc at a bargain price! - 2/26/2008 4:23:24 PM   
daven



Posts: 6922
Joined: 12/7/2001
From: Andover, MN, USA
Status: offline 		Yeah, things are adding up:

39.99 motor
10.00 shipping
9.20 spinner nut
2 cans of brake cleaner at $3.19 each

sub total of $65.57 and I still need a pipe/header.

I didn't see any great deals at the "blow out" either.

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RE: Hi Perf Russian 10cc at a bargain price! - 2/26/2008 4:33:51 PM   
Flyboy Dave



Posts: 13468
Joined: 3/20/2002
From: San Bernardino County, CA, USA
Status: offline 		....these are good deals....

http://cgi.ebay.com/MACS-1460-10-CC-HELO-MUFFLED-PIPE_W0QQitemZ200201284666QQihZ010QQcategoryZ34056QQtcZphotoQQcmdZViewItemQQ_trksidZp1742.m153.l1262

http://cgi.ebay.com/MACS-1920-61-SIZE-ENGINE-11-7-40-45-10-6-25-8-6_W0QQitemZ200194450873QQihZ010QQcategoryZ34056QQtcZphotoQQcmdZViewItemQQ_trksidZp1742.m153.l1262#ebayphotohosting

http://cgi.ebay.com/Macs-Helo-Quiet-PIPE-1701-10-cc_W0QQitemZ200194453264QQihZ010QQcategoryZ34056QQtcZphotoQQcmdZViewItemQQ_trksidZp1742.m153.l1262



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An engineer says.... "That won''t work".
A mechanic says..."Oh yeah, watch this".
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RE: Hi Perf Russian 10cc at a bargain price! - 2/26/2008 10:19:33 PM   
daven



Posts: 6922
Joined: 12/7/2001
From: Andover, MN, USA
Status: offline 		Well I bought the 3rd one you listed Dave.

Mac's Helo Quiet PIPE #1701 10.cc

Not sure I can get away with the muffled or straight tuned pipe at my field.

Anyone know a cheap header for that pipe?

I'm up to $89 now, and not finished....

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RE: Hi Perf Russian 10cc at a bargain price! - 2/26/2008 10:26:35 PM   
XJet


 

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Joined: 3/31/2003
From: Tokoroa, NEW ZEALAND
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quote:

ORIGINAL: daven
I'm up to $89 now, and not finished....


Still a bargain (if it runs reliably and strongly enough).

Even a Thunder Tiger 61GP is $89 and they only last "so long" when you thrash the snot out of them (I posted the pictures elsewhere to show what happens ;-)

If these Russian engines provide as much fun as my 61GP did then they'll be a real bargain, even after you've added a pipe, etc.

Why did you go for a spinner-nut anyway, what was wrong with the stock nut?



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