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

ptv clearance on ls1 flat top

Thread Tools
 
Search this Thread
 
Old Jul 25, 2011 | 07:32 PM
  #1  
01GMC5.3's Avatar
Thread Starter
Launching!
iTrader: (7)
 
Joined: Apr 2009
Posts: 219
Likes: 0
From: Gantt, AL
Default ptv clearance on ls1 flat top

I am building an iron block ls1. I have a set of 2.5 5.3 heads that have been shaved .040ths. they have the 2.02 and i do believe 1.57 exhaust. I have a 224/228 581.588 112+2 and will be rinning a .051 head gaskt. I was wanting to know if I will have sufficient piston to valve clearance??
Reply
Old Jul 25, 2011 | 08:12 PM
  #2  
NVR_SPDS's Avatar
TECH Addict
iTrader: (39)
 
Joined: Aug 2003
Posts: 2,129
Likes: 3
From: Virginia
Default

The safest way to handle is, is to measure.
Reply
Old Jul 25, 2011 | 08:15 PM
  #3  
01GMC5.3's Avatar
Thread Starter
Launching!
iTrader: (7)
 
Joined: Apr 2009
Posts: 219
Likes: 0
From: Gantt, AL
Default

alright just thought I would ask before I went through the trouble
Reply
Old Jul 26, 2011 | 01:27 PM
  #4  
01GMC5.3's Avatar
Thread Starter
Launching!
iTrader: (7)
 
Joined: Apr 2009
Posts: 219
Likes: 0
From: Gantt, AL
Default

anyone else
Reply
Old Jul 26, 2011 | 01:33 PM
  #5  
Sales1@Texas-speed's Avatar
FormerVendor
 
Joined: Jun 2011
Posts: 890
Likes: 3
Default

Definetly agree that measuring your ptv clearance is your best option.
Reply
Old Jul 26, 2011 | 03:19 PM
  #6  
Samer's Avatar
On The Tree
 
Joined: Dec 2010
Posts: 169
Likes: 1
Default

With the heads being milled that much (about 55cc), I think that you'd have to measure even with that small cam.

Does your engine have stock LS1 bottom end? Any intentions for flycutting your pistons?

Remember that with a high compression engine engine, you will need a big cam to keep your dynamic compression in the safe range so that you can still drive your car on pump gas.
Reply
Old Jul 27, 2011 | 05:35 PM
  #7  
01GMC5.3's Avatar
Thread Starter
Launching!
iTrader: (7)
 
Joined: Apr 2009
Posts: 219
Likes: 0
From: Gantt, AL
Default

Originally Posted by Samer
With the heads being milled that much (about 55cc), I think that you'd have to measure even with that small cam.

Does your engine have stock LS1 bottom end? Any intentions for flycutting your pistons?

Remember that with a high compression engine engine, you will need a big cam to keep your dynamic compression in the safe range so that you can still drive your car on pump gas.
well alright then I have been lookin for thicker head gaskets but cant find any?

Has anybody double stacked head gaskets
Reply




All times are GMT -5. The time now is 07:33 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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