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> Royal purple oil, who uses it?
toon1
post Feb 2 2006, 10:57 PM
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you sold me on the R.P., what weight??

Hey Jake, you responded to a question here not too long ago about eliminating the head gaskets. I can't find the thread. what is needed to do that. I will be putting the motor back together soon and am wondering if I should do that.

Will it raise the compression?

what are the pro's and con's?







Did I just hijack my own thread??
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Jake Raby
post Feb 2 2006, 11:24 PM
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Do a search on head gasket removal. The FACTORY has recommended it since 1981 and even sent out a bulletin...

I haven't used a head gasket in about 10 years-

I like 20/50 Royal Purple...
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toon1
post Feb 3 2006, 12:00 AM
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no luck with the search, I will keep trying, thanks for the info..........
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alpha434
post Feb 3 2006, 01:45 AM
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Gasket removal???

Hey, Jake. I'm a big fan of your work... What does head gasket removal entail. I can't find info on it anywhere.
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Dave_Darling
post Feb 3 2006, 02:05 AM
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What it entails is not installing a head gasket when you pull the heads off the motor. You are, according to VW, supposed to add a shim to the cylinder base to maintain the correct compression ratio.

Some around here feel that the VW tech bulletin only applies to the VW-version motors manufactured after about 1978.

Most of those who believe in leaving out the gasket also like to use a fine lapping compound to lap the cylinders to the heads.

--DD
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MattR
post Feb 3 2006, 02:16 AM
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Jake,

Have you tried Motul?
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alpha434
post Feb 3 2006, 02:28 AM
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Hey dave, How big of a shim? And does it hurt to boost the compression ratio this way for 110 fuel?
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Mark Henry
post Feb 3 2006, 07:18 AM
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The shim thickness is determined by doing the math and setting it to the CR that you’re aiming for.

Aircooled.net has a cool CR calculator in the tech section of their site.

You can get the shims from Jake or Rimco.
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toon1
post Feb 3 2006, 08:50 AM
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this is the type of info I was looking for.

I have surfaced the top of the cyl. on a piece of granite tile. Once the C.H's come back from the machine shop I will lap the cyl. to the head.

I havn't gone on the sites to check it out but it sounds like I can't just remove the CH gasket without the correct base shim.

But the compression can be raised effectivly with the correct base shim?

My intentions are to use valve lapping compound to lap the cyl. into the head.

what other materials can be used to do this?
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rhodyguy
post Feb 3 2006, 09:19 AM
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Chimp Sanctuary NW. Check it out.
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let's throw another factor in for fun. has anyone ever used an Oberg oil filter?

k
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Jake Raby
post Feb 3 2006, 09:25 AM
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Yes, I have used Oberg... Holley has a new disc version that is MUCH better if you ask me.
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toon1
post Feb 3 2006, 10:26 AM
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what are the differences between these and say a Fram. Can you clean them?
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TimT
post Feb 3 2006, 10:32 AM
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QUOTE
has anyone ever used an Oberg oil filter


Yes I had an Oberg on my old racecar, currently I use Canton filters. The Oberg you can clean, and you can also buy differnent filter media ie 5 micron, 8 micron etc.
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URY914
post Feb 3 2006, 10:32 AM
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QUOTE (toon1 @ Feb 3 2006, 08:26 AM)
what are the differences between these and say a Fram. Can you clean them?

Yes, it is a basicly a screen that you take out and clean.
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URY914
post Feb 3 2006, 10:35 AM
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here is the filter screen


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URY914
post Feb 3 2006, 10:35 AM
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here is the housing

sorry small pic



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URY914
post Feb 3 2006, 10:50 AM
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They run about $200.00.
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blitZ
post Feb 3 2006, 12:05 PM
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Beer please...
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QUOTE (MarkV @ Feb 2 2006, 08:50 PM)
It's not all that expensive if you buy it in 5's. A little over $20 per oil change. (IMG:http://www.914world.com/bbs2/html/emoticons/beer3.gif)


http://cgi.ebay.com/ebaymotors/Royal-Purpl...itemZ8026145392

That's a good deal, free shipping also.
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Dave_Darling
post Feb 3 2006, 12:14 PM
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QUOTE (toon1 @ Feb 3 2006, 06:50 AM)
I havn't gone on the sites to check it out but it sounds like I can't just remove the CH gasket without the correct base shim.

But the compression can be raised effectivly with the correct base shim?

The base shim is only to restore the compression ratio to stock. If you want a higher compression ratio, you can omit installing the shim. Just make sure your deck height doesn't get too small when you do this (you want about 0.040" I believe), and that your compression winds up in the range that you want.

I am told (but have not verified) that removing the stock head gasket results in "about" a 0.5 point increase in the compression ratio. But it depends on a whole lot of factors, and small changes in some of those factors can have unexpectedly large effects on the compression ratio, so you really want to measure and calculate the actual ratio you are getting.

--DD
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yarin
post Feb 3 2006, 12:15 PM
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In general when an aged motor is switched to synthetic oil doesn't that clean out a lot of the junk in the motor that has otherwise been preventing leaks?

My motor leaks in a few places, normal of course. Will switching to a synthetic oil cause even more leaks?

Thanks
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