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O.S .21tm for my 2.5 project

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Ckeithnitro

Ckeithnitro

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edmonton AB Canada
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  1. Bashing
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put 10 tanks off 30/12 thru it today
will have more run time tmrw...
 
hulkmaxx said:
How are you liking the O.S .21 engine. I have been thinking about giving one a try.
Click to expand...

So far it's great.. With a little preheat it fired right up, no issues in the first 10 tanks. Easy to tune, good idle, producing great power which will only get better....
 
I'm working on a project and I need someone to tell me the outer diameter of the rear exhaust port on the actual casing of the engine. Do you think you could do that for me? Or anybody with an os21tm for that matter.
 
Greeeat engine for a maxx ,loved my OS .21 I had,ditch that pipe its holding her back ,get a ths or if affordable one from ercm,

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I now have a RB Concepts Tmaxx 01 pipe from the 523 on my OS .21tm..
I put one of my ERCM pipes on, the OS loved it.. So eventually I will get Robin to build me another...
 

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