Rampage 32cc compression

[designed2survive]

Ice_2k I've been working with 2 cycle engines for a couple of years now. I know what I'm talking about.

A couple of years... Ok.

This is one of those threads that I love. You guys have way too much patience! Oh boy do you guys really want to help! The language, tone and attitude alone is enough for me. lol!

I know I'm going to get fried for this but what the heck? You want help? Then be humble!

Out!

 

[turkeywrench]

The manual that came with the truck says 20:1 for first 4 hrs of break in the 32:1 for another 4 hrs. I've tried 20:1 then 25:1 but that isn't the problem. I contacted DDM yesterday. He sells Zenoah engines etc. He says, these engines will not even pop or attempt to start without a minimum of 95-100 psi of compression. I'm in the ballpark of 60 psi. A brand new engine with low compression. We can basically chalk it up to it being a dud from the factory. The new piston & ring will be here this week so we'll see how that turns out. I've already got the cylinder off & it's in great shape so no worries there. I'll keep you posted.

 

[RampageHopUps]

The ring might be stuck in the groove of the piston. I would spread some oil around the ring and see if that helps.

 

[turkeywrench]

The ring was loose to begin with. The upper & lower side of the ring on the exhaust side had very small chips missing off it. The cylinder is smooth w/ no gouging of any kind. The piston has fine scratches.

 

[RampageHopUps]

Ughh. Take some pics so we can make sure the factory knows.

 

[turkeywrench]

Will do. Give me a few.

 

[turkeywrench]

The forum isn't allowing me to upload pics.

 

[RampageHopUps]

You need to use photobucket or one of the other free services.

Or private message them to me.

 

[turkeywrench]

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[turkeywrench]

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[turkeywrench]

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[turkeywrench]

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[RampageHopUps]

Hopefully you can get the new ones in and get it started.

 

[turkeywrench]

Yes, I ordered the piston & ring from RC Planet. The are god awful slow to process your order. It's supposed to ship tomorrow.

 

[almighty15]

Any update on this?

 

[turkeywrench]

FedEx says delivery Wednesday (1/6/16) on the replacement piston & ring.

 

[turkeywrench]

**update**

Success! I received the new piston & ring yesterday. The car started in 4 pulls! Runs fantastic. Breaking it in now.

 

[phreerider]

sweet ! man, gotta love that!

 

[RampageHopUps]

Nice. Can you send the old parts to Redcat or to me? I would like to figure out what really went wrong with the machining.

 

[turkeywrench]

Sure. Where do I need to send it?