posted
I've run about 10 tanks though my TM728 now and I've got to say that it's the most reliable running engine I've ever owned.
It's not my first RB (I had a WS7 when it first came out, later on a C5 Rody - both were Pullstartmodded later on) and I've owned about 20 other .21-27 engines to date.
However, none of them comes near the TM728. Put the Glowplug igniter on, prime it, wham - it's up and running... on the first tug. Everytime.
I don't want to diss other engines, but I've got a Sirio .27 around here that was never run due to it's pullstart. This thing ate 3 replacement Pullstarts to date and I still haven't managed to fire it up...
Power-wise, I'd situate it inbetween my WS7 and C5R. It hasn't got the top end of the WS7, but the wicked low-end torque allows you to pull a much lower gearing.
Anyway, I can only recommend this engine. For me, it's the perfect compromise between a sophisticated, high-power Racing-Engine and a reliable running and easy to tune "all-day" engine.
Good Job RB, count me in for the Race-Version as well.
[ 06. June 2004, 10:49: Message edited by: tapoem ]
Posts: 7 | Registered: May 2004
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posted
Tapoem good to here,just curious on your plug selection[hot or cold]cheers Bezzy
Posts: 9 | From: hamilton,ontario | Registered: May 2004
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I'm currently running a rather cold McCoy #9. All of my bigger Engines (.25+) seem to like this plug in combination with 25% fuel (I'm running the Sidewinder 25% Pro-Blend).
Posts: 7 | Registered: May 2004
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posted
I use to run blue thunder all the time but found side winder seemed to burn cleaner run a little better.Race blend 20%fuel 12%oil
Posts: 9 | From: hamilton,ontario | Registered: May 2004
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posted
be carefull with traxxas fuel.. it is castor based and may let the 1 way bearing slip... ive had no issues with odonnal 20% and a guy with blue thunder sport has 1 way slipping issues also.. and someone on central has 1 way issues on his 28 with traxxas fuel.. its a tip i learned from a instruction book i got with a shum... menace.. thunder tiger pointed it out, and after trying odonnal on a engine i used to run traxxas in i can see the differance..
posted
Powermaster is the company who blends for Traxxas. The fuel has a total of 16% oil.
Byron's race 2000 = 12% oil 60%synth 40%castor, 2500 has 11% total with more of it being natural castor. All great fuels.
Castor has higher film strength than most sythetics and has a flashpoint that is about 100F higher than the closest synthetic. The extra film strength however results in greater generation of frictional heat when the lubricant is sheared compared with typical synthetic. Natural castor also has superior anti-corrosion characteristics compared with most good synthetics. Synthetics are engineered to actually repel on a molecular scale actually making 'ball bearing' like droplets. This makes them very slick compared with natural castor and the increased surface area makes the functional groups more readily available for combustion (cleaner burning). So both types of oils have their strengths but only a blend can give you the best of all worlds.
My guess is that the new formulation has a higher synthetic to natural castor ratio resulting in cooler temps despite more total oil content.
Posts: 271 | From: USA | Registered: Apr 2003
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posted
tapoem, I have the same luck with my Sirio .27. The pullstart is a piece of junk, and they cost $60! I'm going to replace it with the RB .28 very shortly.
Posts: 17 | From: New Jersey, USA | Registered: Feb 2003
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