Yella Terra Install Question
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 889
Likes: 0
From: DFW tx
Yella Terra Install Question
I have a question about the Yella Terra rocker arms.
When I installed them, two pair ended up with two dots on the rocker shaft showing, the other six ended up with the smooth side of the rocker shaft showing. Does it matter which side of the shaft is showing? I would think they probably put the dots there for a reason.
I checked out jmX's site -- great site by the way, I would not have done H/C by myself without it -- and he shows one pair installed with the dots up, the other 3 have the smooth side showing. The Yella Terra install directions mention nothing about what the shaft orientation should be. Just want to make sure I am OK before I finish bolting everything up.
Thanks,
Jeff
When I installed them, two pair ended up with two dots on the rocker shaft showing, the other six ended up with the smooth side of the rocker shaft showing. Does it matter which side of the shaft is showing? I would think they probably put the dots there for a reason.
I checked out jmX's site -- great site by the way, I would not have done H/C by myself without it -- and he shows one pair installed with the dots up, the other 3 have the smooth side showing. The Yella Terra install directions mention nothing about what the shaft orientation should be. Just want to make sure I am OK before I finish bolting everything up.
Thanks,
Jeff
Drifting
Joined: May 2000
Posts: 1,413
Likes: 0
From: Wildwood MO
Re: Yella Terra Install Question (Jeff Jeff)
Jeff,
I saw the exact same thing when I installed mine last week along with my H/C package. I looked at the seat area where the rocker bolt sits to see if it was different and didn't see any difference with the dots up or down. I installed mine with the dots down if it makes any difference to you. I only did this, because when they were sitting in the original packaging, the dots were down on all of them.
I saw the exact same thing when I installed mine last week along with my H/C package. I looked at the seat area where the rocker bolt sits to see if it was different and didn't see any difference with the dots up or down. I installed mine with the dots down if it makes any difference to you. I only did this, because when they were sitting in the original packaging, the dots were down on all of them.
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 889
Likes: 0
From: DFW tx
Re: Yella Terra Install Question (MTWallet)
MTWallet,
I didn't see any difference either, but I thought it was strange that one side has dots and the other does not. I am going to try to get ahold of Yella Terra to see if they have any input on this.
I didn't see any difference either, but I thought it was strange that one side has dots and the other does not. I am going to try to get ahold of Yella Terra to see if they have any input on this.
Drifting
Joined: Jul 2000
Posts: 1,818
Likes: 3
From: SoCal
Re: Yella Terra Install Question (Jeff Jeff)
Lemme know what you find out. It all looked symetrical to me and the instructions never mentioned it so I figure it doesn't matter. Thanks!
Jon
http://www.ls1howto.com
Jon
http://www.ls1howto.com
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Brett Foote
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
Re: Yella Terra Install Question (TNTC5)
I've been thinking about the 1.7's as well.
Speed Inc. sells them - at the link below, choose the year of corvette on the left and then valvetrain components. Then they're about halfway down the page. I know others sell them as well.
http://www.ls1speed.com/index.cfm
Speed Inc. sells them - at the link below, choose the year of corvette on the left and then valvetrain components. Then they're about halfway down the page. I know others sell them as well.
http://www.ls1speed.com/index.cfm
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 889
Likes: 0
From: DFW tx
Re: Yella Terra Install Question (2C5only21)
HP gain is minimal. The Yella Terras have a roller tip that contacts the valve, where the stocks do not. Supposedly the stock rockers flex at high rpm's and the Yella Terra's don't. Also some have had the stock rockers lose their needle bearings, although this seems to be rare.
If you have a 97 or 98 with the perimeter bolt valve covers, you have to grind the valve covers to fit. I am in the process of doing that now and it is not fun. If you have a 99+, they fit without grinding.
If you have a 97 or 98 with the perimeter bolt valve covers, you have to grind the valve covers to fit. I am in the process of doing that now and it is not fun. If you have a 99+, they fit without grinding.
Drifting
Joined: May 2000
Posts: 1,413
Likes: 0
From: Wildwood MO
Re: Yella Terra Install Question (Jeff Jeff)
Thunder Racing - $500
I installed them for the piece of mind that they will stay together more than the HP factor. I am sure that the reduces friction on the valve tip has to worth something along with the fact that they don't flex and i'll get a more accurate lift at the valve.
[Modified by MTWallet, 12:30 AM 7/23/2003]
I installed them for the piece of mind that they will stay together more than the HP factor. I am sure that the reduces friction on the valve tip has to worth something along with the fact that they don't flex and i'll get a more accurate lift at the valve.
[Modified by MTWallet, 12:30 AM 7/23/2003]
Melting Slicks
Joined: Dec 2000
Posts: 2,118
Likes: 2
Re: Yella Terra Install Question (MTWallet)
I bought mine from Raging Motorsports....$449 on GP...now they are $479. http://www.ragingmotorsports.com/product.asp?3=191 :cheers: