Generation IV Internal Engine 2005-2014 LS2 | LS3 | LS7 | L92 | LS9

Installed Harland sharps, now...

Thread Tools
 
Search this Thread
 
Old Nov 25, 2012 | 12:44 PM
  #1  
11secLS1's Avatar
Thread Starter
On The Tree
iTrader: (39)
 
Joined: Apr 2002
Posts: 193
Likes: 0
From: Weatherford TX
Default Installed Harland sharps, now...

Thanks

Last edited by 11secLS1; Apr 22, 2013 at 06:18 AM.
Reply
Old Nov 25, 2012 | 01:15 PM
  #2  
Undertow74's Avatar
TECH Fanatic
15 Year Member
iTrader: (45)
 
Joined: Oct 2007
Posts: 1,284
Likes: 13
From: South Carolina
Default

little more clarification needed.....ALL you did was just swap out the rockers to HS roller rockers and that is it, then it started missing?
Reply
Old Nov 25, 2012 | 01:22 PM
  #3  
11secLS1's Avatar
Thread Starter
On The Tree
iTrader: (39)
 
Joined: Apr 2002
Posts: 193
Likes: 0
From: Weatherford TX
Default

Yup cam was existing. Checked the plug wires, coil connections, etc
Reply
Old Nov 26, 2012 | 07:56 AM
  #4  
11secLS1's Avatar
Thread Starter
On The Tree
iTrader: (39)
 
Joined: Apr 2002
Posts: 193
Likes: 0
From: Weatherford TX
Default

Anyone?
Reply
Old Nov 26, 2012 | 09:21 AM
  #5  
Jon@BruteSpeed's Avatar
LS1TECH Sponsor
20 Year Member
iTrader: (3)
 
Joined: Mar 2006
Posts: 664
Likes: 3
From: Under my Formula
Default

Maybe a loose wire harness somewhere?
__________________
95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be

Reply
Old Nov 26, 2012 | 09:27 AM
  #6  
Sales3@Texas-Speed's Avatar
LS1Tech Premium Sponsor
iTrader: (2)
 
Joined: Sep 2011
Posts: 1,116
Likes: 4
Default

Are they stock ratio rockers?
__________________
NOW OFFERING TSP BY YANK CONVERTERS
COMP - FAST - PACESETTER - WISECO PISTONS - LUNATI - CALLIES - NEW TSP BRAND CRANK & RODS - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - ARH HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - PRECISION INDUSTRIES - YANK - CIRCLE D - AND MORE!
NEW NUMBER (512)863-0900
Reply
Old Nov 26, 2012 | 10:12 AM
  #7  
87silverbullet's Avatar
TECH Veteran
iTrader: (11)
 
Joined: Mar 2007
Posts: 4,873
Likes: 8
From: Slidell,LA
Default

I did the same thing you did to the LS2 in my 06 vette. I changed the pushrods (7.400) and put on Harland Sharp rockers and the car did the same thing yours did.

I noticed my stock pushrods were shorter than the 7.400 Comp's I put in. I also had the 1.8 rockers too. I think it all added up to too much and was hanging the valve open causing the misfire.

I took it all off and sold it to a buddy of mine. Put the stock stuff back on and sold the car a few months later.
Reply
Old Nov 26, 2012 | 11:03 AM
  #8  
11secLS1's Avatar
Thread Starter
On The Tree
iTrader: (39)
 
Joined: Apr 2002
Posts: 193
Likes: 0
From: Weatherford TX
Default

Originally Posted by Jake@Texas-Speed
Are they stock ratio rockers?
Yes, stock ratio.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

 Brett Foote
story-1

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-2

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-3

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-4

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-5

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-6

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-7

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-8

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-9

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
Old Nov 26, 2012 | 11:26 AM
  #9  
ss4chad's Avatar
12 Second Club
15 Year Member
iTrader: (26)
 
Joined: Nov 2005
Posts: 688
Likes: 2
From: Keller, TX
Default

Pull the plugs, sounds like one of them is cracked.

Chad
Reply
Old Nov 26, 2012 | 11:27 AM
  #10  
Ohio Bird of Prey's Avatar
Launching!
20 Year Member
 
Joined: Feb 2004
Posts: 225
Likes: 3
From: Beavercreek, Ohio
Default

Sounds as though the PR's are now too long with the new RR's.
Reply
Old Nov 26, 2012 | 11:36 AM
  #11  
Sales2@Texas-speed's Avatar
LS1Tech Premium Sponsor
iTrader: (5)
 
Joined: Jan 2008
Posts: 5,053
Likes: 7
From: Texas!
Default

Wrong pushrod length (too long) for the combo with those rockers.
__________________


Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!

COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
Reply
Old Nov 26, 2012 | 11:56 AM
  #12  
11secLS1's Avatar
Thread Starter
On The Tree
iTrader: (39)
 
Joined: Apr 2002
Posts: 193
Likes: 0
From: Weatherford TX
Default

Originally Posted by Matt@Texas-Speed
Wrong pushrod length (too long) for the combo with those rockers.
I'm going to check the pushrods length on Friday. Any thoughts on where I should expect to be with regards to PR length?
Reply
Old Nov 26, 2012 | 03:11 PM
  #13  
Sales2@Texas-speed's Avatar
LS1Tech Premium Sponsor
iTrader: (5)
 
Joined: Jan 2008
Posts: 5,053
Likes: 7
From: Texas!
Default

Hard to say without measuring....do you have a pushrod length checker tool?
__________________


Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!

COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
Reply
Old Nov 27, 2012 | 05:10 AM
  #14  
Slowhawk's Avatar
LS1Tech Sponsor
iTrader: (12)
 
Joined: Nov 2001
Posts: 14,865
Likes: 6
From: Bridgewater,Ma
Default

You have to check pushrod length with any rocker change. They are too long,do not crank it anymore till it's fixed.
Reply
Old Nov 27, 2012 | 10:29 PM
  #15  
ls7powered's Avatar
Staging Lane
 
Joined: Nov 2012
Posts: 67
Likes: 0
Default

push rods too long for sure!!!!
Reply




All times are GMT -5. The time now is 12:53 AM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-1
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-2
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-3
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-4
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-5
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-6
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-7
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-8
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-9
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE