3M Mintor 170 questions

[Dean Pappas]

Hey Eric,
The 17-13N on an O.S./Bolly EQ140 wanted a 27-1/4" length for tractability, but a 26-1/2" length for good horsepower and minimal richening in W.O.T. level flight.
With the Hattori #900, the length was 25-1/2".
 
My experience with the 3M 140 and its stock carbon pipe is that it wants ~1" between it and the stock header. I don't know, off the top of my head, where that puts the first baffle, but it looks short. If the 170 runs like the 140, what you will discover is a pipe length that is very little compromised (lengthened) for mid-range, and carburetion that makes the midrange behave despite this. You might even hear a hit of short-pipe "strangle" on the ground. I suspect that the second baffle plays an important part too.
 
Call me here at work ...
Dino

-----Original Message-----
From: Henderson,Eric [mailto:Eric.Henderson at gartner.com]
Sent: Monday, May 05, 2003 2:08 PM
To: discussion at nsrca.org
Subject: RE: 3M Mintor 170 questions


I noted a 2" difference in the 1st baffle position in the Bolly pipe to the OS and OS clones. Do you have tuning distances for the 17 x 13 APC and the Bolly pipe, by any chance??
 
Regards,

Eric.
 
 -----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of Tom Collins
Sent: Friday, May 02, 2003 9:45 AM
To: discussion at nsrca.org
Subject: RE: 3M Mintor 170 questions


I currently have spare bearings/pistons/sleeves/O-rings/cyl-heads for the 3M140 and will be stocking the same for the 3M170. So, getting spare parts should not be a problem.
 
Tom Collins
www.BuyRC.com

-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of GW
Sent: Thursday, May 01, 2003 9:35 AM
To: discussion at nsrca.org
Cc: Don Kanak; s.vannostrand at kodak.com
Subject: 3M Mintor 170 questions


For those in the know regarding the 3M 170::
 
 
1: I notice the rear bearing is a double back ball bearing, I do not know what this truly means, but will Boca or the US based 3M retailers  have the replacement bearings available? Any other substitutes? Don't want to be needing a bearing in the middle of the season and be waiting for a bearing from Italy!
 
2. Same question as above but regarding rings? Do the retailers like BuyRC, PlanesPlus, AeroSlave, etc, have replacements in stock, or plans to?  Again, I do not want to be without use of an engine waiting on a ring or bearing from Italy!
 
3. Will the 170 be a drop in replacement for the OS 140? I have heard the bolt patterns are the same, but what about the position of the nose ring, exhaust,etc? Completely interchangeable with no refitting needed?
 
 
Many Thanks
 
GW
 
 
cc: Don Kanak, Lance at Areoslave

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