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Generation III Internal Engine
1.8 yella new kind?

Generation III Internal Engine 1997-2006 LS1 | LS6

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1.8 yella new kind?

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Old

Jan 2, 2008 | 10:06 PM

#1

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1.8 yella new kind?

are these the new lightweight kind? there 1.8 that im buying from a friend. how much u think this will give me?

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Old

Jan 3, 2008 | 12:12 AM

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yes, those are the lightweight ones. I'm sure there will be some gain, but i'm not even going to guess. I bought aftermarket rockers more for stability than performance.

Steve

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Jan 3, 2008 | 04:18 AM

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From: Little Rhody

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What springs are those? Make sure to check the wipe pattern, its critical especially with 1.8's. Report back results.

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Jan 3, 2008 | 08:35 PM

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z06 springs

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Jan 3, 2008 | 08:35 PM

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what is wipe pattern?

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Jan 3, 2008 | 08:59 PM

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Quote:

Originally Posted by crazymofo1986

what is wipe pattern?

The pattern that the roller tip leaves on the valve tip.

Old

Jan 4, 2008 | 06:54 AM

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From: Little Rhody

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I have found when I installed the Yella Terra's the best wipe pattern is achieved with the supplied shims in place. Once you do this, you will need longer pushrods as well.

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Old

Jan 4, 2008 | 02:57 PM

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if i dont use the shims bc i would have to get other pushrods then what and happen if the wipe was not that great

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Old

Jan 4, 2008 | 04:02 PM

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Bad wipe can mean side loading the valves increasing guide wear and leaving power on the table.

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Jan 4, 2008 | 06:30 PM

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Quote:

Originally Posted by vettenuts

I have found when I installed the Yella Terra's the best wipe pattern is achieved with the supplied shims in place. Once you do this, you will need longer pushrods as well.

I have a set of these that are going to be installed on my new engine so I'm wondernig what dictates the best wipe pattern and how to determine it?

Old

Jan 4, 2008 | 08:01 PM

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Quote:

Originally Posted by Beaflag VonRathburg

I have a set of these that are going to be installed on my new engine so I'm wondernig what dictates the best wipe pattern and how to determine it?

Its discussed in the cam sticky up top.

Old

Jan 4, 2008 | 08:02 PM

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Quote:

Originally Posted by Beaflag VonRathburg

I have a set of these that are going to be installed on my new engine so I'm wondernig what dictates the best wipe pattern and how to determine it?

you want the pattern to be right down the center of the valve tip. yes this sounds like a no brainer, but many valvetrains are setup with wipe patterns that are off to the side.

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Jan 4, 2008 | 09:38 PM

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From: Little Rhody

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Centered and narrow, you should be able to achieve a 0.060" wide wipe pattern with these rockers. This is one of the primary advantages of these rockers, don't waste it.

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