yella terror

Reply Subscribe

Thread Tools

Search this Thread

Sep 8, 2011 | 04:33 PM

#21

vettenuts

Team Owner

Joined: Mar 1999

Posts: 22,025

Likes: 192

From: At the beach in little Rhody

No, wanted to see how much lift he was running and if he was running the standard spring since valve bounce can occur. Sometimes a failure is a symptom as opposed to the problem itself.

Sep 8, 2011 | 04:43 PM

#22

sabastian458

Melting Slicks

Joined: Jan 2009

Posts: 2,127

Likes: 33

From: Easley/Anderson South Carolina

Quote:

Originally Posted by pewtervette01

last April vengeance racing

I have a thread on LS1tech about this. There is contact info for Yella Terra. Also you can contact your supplier and they can assist you in the replacement.

I still have my 2nd set in my LS2 and they are working great. And I bought my 1st set from Vengance also

EDIT- found the thread, I have one on here also. (edit- not my thread, but one where I posted in)

http://www.ls1tech.com/forums/genera...r-failure.html

http://forums.corvetteforum.com/c5-t...a-rockers.html

Last edited by sabastian458; Sep 8, 2011 at 04:48 PM.

Sep 8, 2011 | 04:47 PM

#23

sabastian458

Melting Slicks

Joined: Jan 2009

Posts: 2,127

Likes: 33

From: Easley/Anderson South Carolina

Quote:

Originally Posted by bmfrc

Welcome to the club!

That doesnt look like the ones I have.

Sep 8, 2011 | 04:57 PM

#24

pmj341

Melting Slicks

Joined: Mar 2008

Posts: 2,835

Likes: 5

From: Avon Park FLORIDA

St. Jude Donor '08-'09-'10

those look like Crane's

Sep 8, 2011 | 05:15 PM

#25

mAydAy121

Burning Brakes

Joined: Jun 2009

Posts: 1,022

Likes: 0

From: Concord NC

St. Jude Donor '10

Quote:

Originally Posted by Nate B

I know two people that have had YT rockers break here in the last month, one of them took out his motor. He called yellow terra and they told him they werent designed tor more than 400 lbs of seat pressure...

And we're comparing a solid roller setup to a hydraulic setup......why? If you've got 400# of seat pressure on a hydro setup you're screwed from the get-go. Your average H/C LS will likely be under ~150# on the seat and under ~400# open (some may be a tad more...not much).

Seems like there's been a lot of 'bad batches' of yella terra's. That said, my Jesel's were part of a bad batch and cracked at the tips. The difference is, Jesel told me to send the whole set back and rebodied every one of them for free, no questions asked....

Sep 8, 2011 | 05:58 PM

#26

miami993c297

Melting Slicks

Joined: Sep 2003

Posts: 2,062

Likes: 117

Quote:

Originally Posted by vettenuts

No, wanted to see how much lift he was running and if he was running the standard spring since valve bounce can occur. Sometimes a failure is a symptom as opposed to the problem itself.

What amount of lift are you concern about with the Yella Terra rockers???

On my previous build, the LS6 stock rockers trunion upgraded handled 7400rpm everyday with a 0.630 intake lift for 30000 miles without causing any damage to the valve guides...and without any valve-train instability!!!

That is not theory, but facts.
Christian

Sep 8, 2011 | 06:01 PM

#27

vettenuts

Team Owner

Joined: Mar 1999

Posts: 22,025

Likes: 192

From: At the beach in little Rhody

Not concerned on the lift per se, but the amount of static force being applied to the rocker at full open.

Sep 8, 2011 | 06:28 PM

#28

miami993c297

Melting Slicks

Joined: Sep 2003

Posts: 2,062

Likes: 117

Quote:

Originally Posted by vettenuts

Not concerned on the lift per se, but the amount of static force being applied to the rocker at full open.

Understood...you are speaking of "static forces" (A Static force is a force that is frictional, and pulls two things together.)

To make that short:

- What kind of camshaft lift vs spring pressure is overrated for the Yella Terra Rocker?

Christian

Corvette Stories

The Best of Corvette for Corvette Enthusiasts

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Michael S. Palmer

2027 Corvette vs The World: Every Model vs Closest Competitor

Joe Kucinski

10 Most Common Corvette Problems of the Last 20 Years!

Joe Kucinski

5 MOST and 5 LEAST Popular Corvette Model Years in History!

Joe Kucinski

2027 Corvette Buyer's Guide: Everything You Need to Know!

Joe Kucinski

10 Things C8 Corvette Owners Hate (But Won't Tell You)

Joe Kucinski

10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

Brett Foote

Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Joe Kucinski

Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

Michael S. Palmer

5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

Joe Kucinski

Sep 8, 2011 | 06:59 PM

#29

vettenuts

Team Owner

Joined: Mar 1999

Posts: 22,025

Likes: 192

From: At the beach in little Rhody

A static force would be a height/stiffness calc. No inertial forces.

There are two questions, is the rocker heavily loaded or conversely, is the rocker not being correctly controlled.

Sep 8, 2011 | 07:10 PM

#30

miami993c297

Melting Slicks

Joined: Sep 2003

Posts: 2,062

Likes: 117

Quote:

Originally Posted by vettenuts

A static force would be a height/stiffness calc. No inertial forces.

I don't feel this is the place to debate about "static force"...I let it to you

Quote:

Originally Posted by vettenuts

There are two questions, is the rocker heavily loaded or conversely, is the rocker not being correctly controlled.

Do you, or the factory, have numbers in term of camshaft lift and spring pressure limitation for the Yella Terra rocker before compromising the aluminum integrity at the weakest spot?

As you ask this specific question in your post # 19 you must have the answer...
Christian

Reply Subscribe