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Old 11-28-2005, 02:37 PM   #541
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where can i buy those permatex rtv high temp silicon?
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Old 11-28-2005, 02:38 PM   #542
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You should be able to find it at any auto parts store.
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Old 11-28-2005, 02:43 PM   #543
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thanks for the info: guys, appreciate the help.
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Old 11-28-2005, 08:55 PM   #544
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Quote:
Originally Posted by rowveg36
yes, it is a mugen x12 that i bought from you. used it last paris racing here in las vegas.
If you send it to me, I will repair the engine for you.
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Old 11-28-2005, 09:48 PM   #545
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uriah, you are the man!!! i would really appreciate the help. do you want me to send the whole engine or just the crank shaft it self?
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Old 11-29-2005, 04:46 AM   #546
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Quote:
Originally Posted by rowveg36
uriah, you are the man!!! i would really appreciate the help. do you want me to send the whole engine or just the crank shaft it self?
You can just send me the whole engine.
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Old 11-29-2005, 09:05 AM   #547
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will send the engine today, thank you.
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Old 12-06-2005, 11:22 AM   #548
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Uriah,
you have a pm.
thanks
mike
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Old 12-15-2005, 03:52 PM   #549
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received the engine yesterday, thanks a lot uriah.
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Old 12-15-2005, 06:41 PM   #550
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[QUOTE=Grinder]You can use Permatex RTV high temp silicon to fill the void. QUOTE]

Hey Uriah...is this what most engine manufacturers use? I had a TOP motor that came that way.

BTW...the price of gas is coming down so you and Nick should head down to Florida

Francis
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Old 12-16-2005, 06:58 AM   #551
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[QUOTE=JustRace]
Quote:
Originally Posted by Grinder
You can use Permatex RTV high temp silicon to fill the void. QUOTE]

Hey Uriah...is this what most engine manufacturers use? I had a TOP motor that came that way.

BTW...the price of gas is coming down so you and Nick should head down to Florida

Francis
Hi Francis. I am not sure if we will make it down before Winternats or not. I would like to though. It seems that the engine manufacturers have some type of liquid RTV. The properties are very similar to the stuff you buy at the auto parts store when dry, but I think they are pouring it and letting it dry. I have found some pourable versions, but they will not withstand the fuel and temperature inside the engines. It takes some practice, but I can get the regular stuff pretty smooth, and especially on .21's.
If anyone out there knows of a liquid type RTV that will withstand fuel and temperature, lets here it.
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Old 12-16-2005, 08:56 AM   #552
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Quote:
Originally Posted by Grinder
If anyone out there knows of a liquid type RTV that will withstand fuel and temperature, lets here it.
GE RTV 116 seems to work. silicone is inert to most chemicals anyways and the flowable 116 can withstand temperature up to 500F after curing. the only concern i have is the hardness, wish they make it higher than 28A but it work as is.
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Old 12-16-2005, 10:48 AM   #553
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Quote:
Originally Posted by Data
GE RTV 116 seems to work. silicone is inert to most chemicals anyways and the flowable 116 can withstand temperature up to 500F after curing. the only concern i have is the hardness, wish they make it higher than 28A but it work as is.
The problem is not the heat, but the adhesion to the metal. Most silicones do not withstand our fuel.

I'm using the same stuff that Uriah is using (thanks for the tip a long time ago Uriah ) and it holds up great.
The way I get it modeled and smooth, is to take the rounded end of a medium size zip tie, spit on it and smoothen out the silicone the way I want it. Works pretty good.

You have to make sure that the surface inside the intake window of the crank is absolutely clean (break cleaner) dry and slightly rough/sanded, then the silicone will have excellent adhesion
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Old 12-16-2005, 11:17 AM   #554
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Quote:
Originally Posted by stefan
The problem is not the heat, but the adhesion to the metal. Most silicones do not withstand our fuel.

I'm using the same stuff that Uriah is using (thanks for the tip a long time ago Uriah ) and it holds up great.
The way I get it modeled and smooth, is to take the rounded end of a medium size zip tie, spit on it and smoothen out the silicone the way I want it. Works pretty good.

You have to make sure that the surface inside the intake window of the crank is absolutely clean (break cleaner) dry and slightly rough/sanded, then the silicone will have excellent adhesion
He's not talking about the heat tolerance being the problem. He's talking about the hardness so it doesn't deform under the rotation of the crank.
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Old 12-16-2005, 12:18 PM   #555
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Quote:
Originally Posted by Racing4Evo
He's not talking about the heat tolerance being the problem. He's talking about the hardness so it doesn't deform under the rotation of the crank.
No he's not. Where do you think the silicone could go when the crank rotates?

Centrifugal force is pressing it into the crank, not out.
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