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2017 OS Speed R2103 3.5cc Nitro On Road Engine

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06-19-2018 | 05:18 AM

#91

ralphierace13

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Thank you very much!!

VS_Rody likes this.

06-22-2018 | 03:22 PM

#92

implusepro

Tech Adept

Joined: Feb 2002

Posts: 196

What is the top end like on these engines? I heard from a friend that they lack abit on top compared to the Nova’s? can’t decide between these and the new Mephisto.

06-22-2018 | 10:04 PM

#93

VS_Rody

R/C Tech Elite Member

Joined: Jun 2014

Posts: 265

From: Carces FRANCE

Quote:

Originally Posted by implusepro

What is the top end like on these engines? I heard from a friend that they lack abit on top compared to the Nova’s? can’t decide between these and the new Mephisto.

Haven't seen one of these around here but for me topspeed compared to the Nova’s is about the same.

06-23-2018 | 05:56 AM

#94

choisan

Thread Starter

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From: Bay Area

os will never fail you. really nice engine, very economic maintenance

06-26-2018 | 11:31 PM

#95

snuvet75

Tech Master

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Posts: 1,589

What is GSR engine based on R2103? How is it better than Original R2103? d

06-28-2018 | 09:07 AM

#96

nitrodude

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From: Oxnard, CA

Quote:

Originally Posted by implusepro

What is the top end like on these engines? I heard from a friend that they lack abit on top compared to the Nova’s? can’t decide between these and the new Mephisto.

Nope, you just have to gear right.

09-06-2022 | 02:57 AM

#97

magnushedqvist

Tech Apprentice

Joined: Sep 2010

Posts: 92

From: sweden

What would be the best current option for piston and sleeve for this engine? I run 16% fuel in europe. Is it the eurospec or just a stock 2103? I tried a 2104 but lets just forget about that.

09-06-2022 | 03:07 AM

#98

VS_Rody

R/C Tech Elite Member

Joined: Jun 2014

Posts: 265

From: Carces FRANCE

Quote:

Originally Posted by magnushedqvist

What would be the best current option for piston and sleeve for this engine? I run 16% fuel in europe. Is it the eurospec or just a stock 2103? I tried a 2104 but lets just forget about that.

The Eurospec sleeve is a possibility but due to the low crankshaft timing of the R2103 you might not get all the advantage out of it.
So I suggest you stay with the original P/S

What happened with the R2104 sleeve?

09-06-2022 | 03:42 AM

#99

Roelof

Tech Lord

Joined: Aug 2007

Posts: 14,052

From: Holland

I guess scratches on the piston.

09-06-2022 | 03:46 AM

#100

magnushedqvist

Tech Apprentice

Joined: Sep 2010

Posts: 92

From: sweden

Quote:

Originally Posted by Roelof

I guess scratches on the piston.

Yeep that's right. A huge crack in the piston and the sleeve actually broke and ripped it

09-21-2022 | 02:34 AM

#101

magnushedqvist

Tech Apprentice

Joined: Sep 2010

Posts: 92

From: sweden

Quote:

Originally Posted by magnushedqvist

What would be the best current option for piston and sleeve for this engine? I run 16% fuel in europe. Is it the eurospec or just a stock 2103? I tried a 2104 but lets just forget about that.

What about if I change crankshaft to the eurospec? Is that a better option than to build it back to r2103 specs?