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Trackstar SEG Series Supar-21

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Old 07-24-2015, 06:50 PM
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Post Trackstar SEG Series Supar-21

Any person to use this engine in GT 1/8

http://www.hobbyking.com/hobbyking/s...e_For_Car.html

Add some power to your 1/8 on road vehicle with the new Trackstar Supar 21 Race Engine.
This high-rpm, huge power glow engine will give your car all the power it needs while
drowning out the sound of those electric powered models! No need to worry about
expensive batteries here. Just re-fuel and you're off!

The TrackStar Supar 21 Race Engine features a rear exhaust, an ABC piston design,
lightweight construction, a double needle 8mm carburetor. This is truly a high
performance racing engine at a fraction of the cost of the big name brands!

Features:
High performance and high torque ABC liner with 3 by-pass ports
Dual ball bearing-supported crankshaft
Turbo combustion chamber
Double needle carburetor in aluminum-plastic composite construction
High quality, high speed bearings
SG Crankshaft
Red anodized cooling Head

Specs:
Engine Size: 3.50cc
Maximum Power: 2.65hp
Practical Range: 6,000rpm - 46,800rpm
Bore / Stroke: 15.90 x 17.60 mm
Ports: 3
Crankshaft: 14mm SG
Carburetor: Aluminium 6061 - 8.0 mm
Glow Plug Type: Turbo Plug
Exhaust Type: Rear
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Old 07-25-2015, 02:02 AM
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It is an offroad engine with an onroad configuration due the mirrored carburator and a smaller head.

I have modded one:
http://www.modelbouwforum.nl/threads...onroad.225686/
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Old 07-25-2015, 07:50 AM
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Originally Posted by Roelof View Post
It is an offroad engine with an onroad configuration due the mirrored carburator and a smaller head.

I have modded one:
http://www.modelbouwforum.nl/threads...onroad.225686/
So how does it go? Is it good?
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Old 07-25-2015, 08:07 AM
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The guy for who I did modify this engine has bought 2. The stock he has runned in his Velox V8 onroad and he was impressed. For sure no winner but it was running nice for that money. The modified he still has not runned it yet.

The stock stock engine seems to be a good rain engine, he has won a clubrace with it with many laps in lead and was going strong all the way.
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Old 07-25-2015, 09:42 AM
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Roelof, are those similar / identical to the Xact motors?
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Old 07-25-2015, 11:09 AM
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I do not know them. Here on the forums in the offroad part some are pretty sure it is a Go.
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Old 07-28-2015, 10:11 AM
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I bought one. It seems to be a pretty strong performer for low budget engine. After i installed it and got it fired up I found all the head bolts were loose and spraying fuel every where. So if you buy one make sure all the bolts are tight.
Over all not a bad engine.
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Old 07-28-2015, 08:17 PM
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Originally Posted by pdento View Post
I bought one. It seems to be a pretty strong performer for low budget engine. After i installed it and got it fired up I found all the head bolts were loose and spraying fuel every where. So if you buy one make sure all the bolts are tight.
Over all not a bad engine.
Do you use this engine in a GT car or 1/8 track car?
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Old 07-29-2015, 03:53 AM
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I run it in a Shepherd velox
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Old 07-29-2015, 07:27 PM
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Thanks guys and I get the engine, what percentage of nitro recommend me and spark plug
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Old 07-31-2015, 05:03 AM
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It runs a turbo plug.
I run 25% nitro in mine. It seems to do pretty well with it.
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Old 08-21-2015, 01:35 PM
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So what is everyone's thoughts about this engine. I have run a little under of gallon of fuel threw the engine. It's been running in a Tekno NB48. Quality has been good. Tune has been good. The only complaint I have is the carb boot. It has torn. It actually tore rather quickly. I have engines that are over three years old and the carb boots show no signs of wear. So hopefully Trackstar will fix that in the future or sell the boot separately.
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Old 03-27-2017, 04:39 AM
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Originally Posted by Roelof View Post
The guy for who I did modify this engine has bought 2. The stock he has runned in his Velox V8 onroad and he was impressed. For sure no winner but it was running nice for that money. The modified he still has not runned it yet.

The stock stock engine seems to be a good rain engine, he has won a clubrace with it with many laps in lead and was going strong all the way.
And finally yesterday it saw the track

+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.


I bought myself a new Go engine for 40 euro so we both could run clubraces with this level engines, ofcourse a bit modified But indeed the Trackstar is Go based because the crankcase was identical as also the timings of the sleeve.

Sadly the bushing of the rod of my Go came out and did ruin my engine a bit but his engine was going strong although the lifespan of the P/S is very short running that engine on this performance. Now it needs a pinch.
Fastest laptime was a 13.9 which is just 0.5 sec off from his pace with real fast engines. Not that bad at all.
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Old 03-28-2017, 03:30 AM
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Great job Roelof! Looks very good. How short is the P/S life? Remember, a whole new set is only around 20€
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Old 03-28-2017, 04:17 AM
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You can run a clubrace (3x 5min qualify + 30min final) when you will notice a compression loss, indeed 20 euro for a P/S set is still cheap.
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