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21# SH Motor 3.5hp

21# SH Motor 3.5hp

Old 07-13-2009, 08:01 PM
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Default 21# SH Motor 3.5hp

Hello everyone,

My name is Sohan and this is my first post. I only joined today.

Yeasterday I purcahsed via ebay a BSD nitro buggy with a 21# SH Motor. This is my first nitro buggy. Many years ago I had a nitro road car but wanted to get into the off road stuff.

What I am hoping I can get help with is a easy to follow precise run in procedure. My previous nitro road car I ran too lean and burnt out the motor. I dont want to do it with this one.

I have some instructions from the seller but they contradict itself. It starts off by saying to turn the screw 4.5 turns from all the way in and run a tank, then for the next 5 tanks turn it 1.5 times in per tank, this adds up to 6 turns which isnt possible because you only turn it out 4.5 times to begin with.

Can someone help me, I am knew to this and dont understand allot about nitro motors, I need some easy to follow instruction.

Anything would be greatly appreciated.
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Old 07-13-2009, 10:11 PM
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im not particularly sure what engine you are refering to although im an sh fan and know a little about them. good engine. anyhow if you could give better details identifying your engine maybe someone could help. not sure how much nitro you have been around but it could be time to get somebody local to help. i do know every sh engine i have had needed to be disasembled,inspected sealed and re-assembled before fired up and ran-in.

or try the dynamite xp thread. also a sh engine, might be helpful.

Last edited by 8&stuff; 07-13-2009 at 11:09 PM.
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Old 07-13-2009, 11:17 PM
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The only details I can get out of the seller so far is the following:
BSD Racing RC Nitro Powered Car 4x4 Buggy 1:8 RTR 21# SH Motor 3.5 hp.
I know its not much but thats all I can get my hands on until the weekend.
I sent the seller an email advising them their run in procedure supplied does not make any sense and I was told to call on weekend when they have a technicial avialable so I will try that and see how I go.

I am still open to suggestions though.

The kit I bought comes with a fully assembled buggy and controller, I just need the fuel and batteries for the transmitter and I should be off but im going to buy a few extra's to make sure im set.
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Old 07-13-2009, 11:21 PM
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The HP rating can only be used with SH as a guide. No way in hell does it make 3.5 HP. You need to understand that early in your career. The engine probaly actually makes 1 HP or less in the real world.
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Old 07-13-2009, 11:56 PM
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I didnt take the hp claim to be accurate, and to be honest it doesnt bother me at all. This is my first off road buggie and I dont plan to race anytime soon. I just want to get a handle on it, have some fun and do small upgrades as I get more confisdent with it.

There is a dedicated off road track near my house that host races ever sunday during summer. I would like to compete down the line but not yet.

I know it has a 2 speed gearbox which should make it faster than the road buggy I had which was also an entry level unit.
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Old 07-14-2009, 01:34 AM
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all the answers you need, are the 3rd and 4th thread of this forum. its a sticky, and should be followed closely if you want to keep your buggy running like a top for many years.

long story short, you want to run your engine very RICH while the engine breaks in. the heavy fuel will lubricate the engine while its breaking in. every tank, you can lean it out alittle. by the 4th or 5th tank, you should be close to dialing it into your temp range, and enjoying nitro power.

read the sticky threads.. they're there to help you. and they're in BOLD!
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Old 07-14-2009, 08:47 AM
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Originally Posted by builtb16a View Post
all the answers you need, are the 3rd and 4th thread of this forum. its a sticky, and should be followed closely if you want to keep your buggy running like a top for many years.

long story short, you want to run your engine very RICH while the engine breaks in. the heavy fuel will lubricate the engine while its breaking in. every tank, you can lean it out alittle. by the 4th or 5th tank, you should be close to dialing it into your temp range, and enjoying nitro power.

read the sticky threads.. they're there to help you. and they're in BOLD!
Id have to agree with the above. i know what some sh needle settings were or close but different engines have different settings.
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Old 07-14-2009, 06:52 PM
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I was about to jump on here and blast that HP claim but air8 beet me to it.

Onroad motors aren't pulling 3 on most good dynos, though 2 is not unheard of.

Sorry I can't help with the rest, no experience with SH.
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Old 07-14-2009, 08:01 PM
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Thanks for all the help. I will have a look for the sticky threads.

The buggy arrived today, looks awesome, cant wait to get it home. The transmitter looks very cheap though, I want to upgrade that quickly.
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