Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

918 Spring Test

Thread Tools
 
Search this Thread
 
Old Dec 11, 2004 | 07:10 PM
  #1  
Cal's Avatar
Cal
Thread Starter
TECH Veteran
iTrader: (1)
 
Joined: Feb 2003
Posts: 4,691
Likes: 3
From: Northern Utah
Default 918 Spring Test

How much spring presure should a CC 918 have at a half-inch off the seat? I just measured 139 lbs seat at 1.8", which I think is normal, and 273 lbs at 0.500 inch. Does this sound normal?

I've only got 10,000 miles on the springs, but just started getting a loud valve train noise.
Reply
Old Dec 11, 2004 | 08:54 PM
  #2  
code4's Avatar
9 Second Club
20 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (30)
 
Joined: Apr 2004
Posts: 1,419
Likes: 0
Default

Originally Posted by Cal
How much spring presure should a CC 918 have at a half-inch off the seat? I just measured 139 lbs seat at 1.8", which I think is normal, and 273 lbs at 0.500 inch. Does this sound normal?

I've only got 10,000 miles on the springs, but just started getting a loud valve train noise.
When I bought my 918's I was told that they should have 130 lbs seat at 1.8" installed height. I checked them before installing and they were right at 130 lbs. I was also told that as long as they were above 115 with my 224 cam they were still good. Sounds like yours is stronger than mine were new?
Reply
Old Dec 11, 2004 | 09:52 PM
  #3  
Cal's Avatar
Cal
Thread Starter
TECH Veteran
iTrader: (1)
 
Joined: Feb 2003
Posts: 4,691
Likes: 3
From: Northern Utah
Default

OK that's good to hear, thanks for the answer. Maybe I'll keep the strings for another 10,000 then. But it looks like I might need lifters . . .
Reply
Old Oct 26, 2007 | 10:34 PM
  #4  
hotrod44_4u's Avatar
Staging Lane
 
Joined: Aug 2005
Posts: 56
Likes: 0
From: bowling green,ky
Default i have a sucky gm ls1 hot cam

on my 98 artic white z28,i just bought some 243 heads off a vet with the yellow spring,my question is will i need different spring with it cam i'm running GMPP Hot, Int. 219/29 0.525 thanks jason
Reply
Old Oct 26, 2007 | 11:24 PM
  #5  
massls1guy's Avatar
TECH Fanatic
iTrader: (9)
 
Joined: Nov 2005
Posts: 1,311
Likes: 0
From: Mass
Default

Originally Posted by hotrod44_4u
on my 98 artic white z28,i just bought some 243 heads off a vet with the yellow spring,my question is will i need different spring with it cam i'm running GMPP Hot, Int. 219/29 0.525 thanks jason
You should start a new thread for your question, it's a different topic.
Reply




All times are GMT -5. The time now is 09:40 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE