I found a gasket set that has silicone oil control rings, not silicone encapsulated but solid silicone. Does anyone have any experience with them?

 

That the Felpro set?

 

Yes sir. Are they worth using?

It also looks like the inner water seals are OEM.

 

I only tried this set once for a short term about 7000 miles. The engine came apart for inspection of the hard faced springs for my ceramic seals.

The fitment was good on the silicone oil seal "o" rings and they seemed to work fine but I couldn't say for the long haul. Would they stay supple and hold their shape and not go square??

The inner water seals worked fine too and you are right they look exactly like the factory ones.

 

I will not recommend using Silicone oil "o" rings.
The temp rating on Silicone is 120deg C,which is not high enough if you are using it with oil,and not with water.

I have had excellent success Viton seals for the oil control rings,as they are meant for high temp use.For added assurance,Viton is used on Air Compressors.They have extreme oil temps,and the seals rarely,if ever fail

Karis

 

I deal with them at work (manufacturing). We only use them with water. If you throw a silicone o-ring in solvent or even in kerosene it will swell to twice it's size over night. I don't know about engine oil though. I can't say I have direct experience with it.

 

I had a set of push rod tubes out of a Lycoming today and oddly enough it has a viton o-ring (case side) and a silicone o-ring (cylinder side). I threw them both in some acetone and after about 2 hours they had both swelled from their original size with the silicone swelling slightly more. I looked it up and found that the silicone does have a higher max temperature than viton (450F VS 400F for the viton). I don't know how it would react with fuel though. The oil wouldn't be a problem but i plan on running methanol so i may just throw the vitons back in and not worry about it.

Thanks everyone for your input.


Turns out Silicone is very compatible with methanol.

http://www.efunda.com/designstandard...C=Methanol#mat

 

I'm starting to worry about you now. I think the Viking War hammer have got to you. Do you feel the urge to shop on e-bay?
Do yourself, your money and your motor a big favor and purchase a factory gasket set and oil control seals. Are you building a disposable motor?

 

Probably


If i had someone like you to answer all my questions i would feel more comfortable.

 

I'm going to be keeping my eye on you from now on then. Your status is going to be up for evaluation. You're officialy on probation so be on the look out for Manny!

 

DAMMIT!!!!!! I was just deemed a "pro" and i am already being evaluated.

Please don't tell Manny I'll never let it happen again, I swear.

OK Chris, I'll put the vitons in it. Almost have all the goods to build it. My intake and rotor housings should be back from the island soon. Keep an eye out for more stupid questions .

 

there are no stupid questions grass-hopper , just stupid answers
when you post questions that you allready know the answer to you start second guessing yourself and the ones that are actually giving you honest advise freaking TEXANS

 

Yeah, it seems like the answers should be more complicated. Like there should be some kind of super secret part or a process that no one but the pros knows about. So far from what i have learned it just seems way too simple. There are not really any secrets in building an engine other than paying close attention to clearances, an intake tract that will allow tremendous amounts of air in, a proper sized turbo, and some minor strengthening and oiling system mods. Even tuning (from what i have experienced) seems very simple. I think it would be harder to get a rotary to idle at stoich than it would be to make 800hp with the right setup. I'm not saying it is so easy that anyone can do it but i am starting to see why Chris always says it's about the combo. It takes all the components working together to make it down the track fast (engine, turbo, tune, clutch, trans, rear, front suspension, 4 link, rear suspension, ect...). There is not ONE secret, i guess that is just hard for me to swallow.

 

i heard its not as hard if you just close your eyes and go for it , slurp , slurp

 

 

It's an acquired taste. If you cup the ***** then the really good info comes out .

My new project showed up on Monday too. We already got an 8.5 out of her .