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

head gasket?

Old Jul 17, 2007 | 07:02 PM
  #1  
SSdreamz's Avatar
Thread Starter
TECH Enthusiast
iTrader: (3)
 
Joined: May 2005
Posts: 590
Likes: 0
From: York, PA
Default head gasket?

what bore size should i get for my 3.905 inch bore block? i know im going with a MLS gasket. my engine builder said the Fel Pro 4.100 bore, .053 thickness for a 11.07 to 1 compression ratio. now i called around for prices... cometic makes a .051 thickness gasket at either 3.910 or 4.130. not the size the engine builder told me to get. the Cometics would only net me 11.1 to 1 compression ratio, (according to one calculator. and 11.46 to 1 with another calculator) dont know which one to go by. what is anyones opinion?
Reply
Old Jul 18, 2007 | 10:38 AM
  #2  
Dmoney's Avatar
TECH Resident
iTrader: (22)
 
Joined: Nov 2001
Posts: 836
Likes: 1
From: laredo,tx
Default

Why would your builder recommend a head gasket for a 383-422ci when your at 346ci. 3.910 is the best for stock applications. It all depends on what you exactly want. What compression are you set on??? Are your heads milled??? What is your deck height??? Do you have stock flat top pistons??? All this comes into play when considering headgaskets.............
Reply
Old Jul 18, 2007 | 11:12 AM
  #3  
brad8266's Avatar
TECH Senior Member
iTrader: (23)
 
Joined: Aug 2005
Posts: 8,797
Likes: 0
From: Watertown, NY
Default

^^^ you want a 3.910 gasket
Reply
Old Jul 18, 2007 | 03:41 PM
  #4  
SSdreamz's Avatar
Thread Starter
TECH Enthusiast
iTrader: (3)
 
Joined: May 2005
Posts: 590
Likes: 0
From: York, PA
Default

its not a 346, it is indeed a 383 like you mentioned. flat top pistons w/ -2cc reliefs. i want between 11:1 and 11.5:1 compression, just a clean mill on the otherwise stock AFR 205 heads... 66 cc
Reply


Thread Tools
Search this Thread

All times are GMT -5. The time now is 04:21 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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
story-9
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0

The world was a better place when it was still around.

By Brett Foote | 2026-01-23 09:20:37


VIEW MORE