LS1TECH - Camaro and Firebird Forum Discussion

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

PTV related to LSA

Thread Tools
 
Search this Thread
 
Old Apr 5, 2011 | 08:44 PM
Share
  #1  
intenseblue's Avatar
intenseblue
Thread Starter
TECH Regular
15 Year Member
iTrader: (1)
 
Joined: Apr 2006
Posts: 442
Likes: 1
Default PTV related to LSA
How much does lowering the LSA/ICL alter PTV clearance?
Reply
0
Old Apr 5, 2011 | 09:07 PM
Share
  #2  
99Bluz28's Avatar
99Bluz28
TECH Senior Member
iTrader: (35)
 
Joined: Nov 2007
Posts: 9,705
Likes: 12
From: C. V., Kalifornia
Default
The biggest factor is the lobe duration.
Reply
0
Old Apr 5, 2011 | 09:15 PM
Share
  #3  
intenseblue's Avatar
intenseblue
Thread Starter
TECH Regular
15 Year Member
iTrader: (1)
 
Joined: Apr 2006
Posts: 442
Likes: 1
Default
232/234 112+2 Was told it would safely clear most likely with .080/.100 clearance Pretty much a Torquer V2. I'm kinda wanting to order one on a 110+2 but I don't have a clue how much it will affect my PTV clearance.
Reply
0
Old Apr 5, 2011 | 09:23 PM
Share
  #4  
KevinR's Avatar
KevinR
TECH Fanatic
 
Joined: Jan 2010
Posts: 1,219
Likes: 0
From: Euless Tx
Default
That cam will be fine. The trex is bigger on a tighter lsa and works with stock heads. It's always a good idea to measure
Reply
0
Old Apr 5, 2011 | 09:25 PM
Share
  #5  
intenseblue's Avatar
intenseblue
Thread Starter
TECH Regular
15 Year Member
iTrader: (1)
 
Joined: Apr 2006
Posts: 442
Likes: 1
Default
Heads are 62cc with 2.04/1.57 valves
Reply
0
Old Apr 5, 2011 | 09:30 PM
Share
  #6  
KevinR's Avatar
KevinR
TECH Fanatic
 
Joined: Jan 2010
Posts: 1,219
Likes: 0
From: Euless Tx
Default
Well, you got me on that one....Might want to call a sponsor and see what they recommend for your setup??
Reply
0
Old Apr 5, 2011 | 09:39 PM
Share
  #7  
intenseblue's Avatar
intenseblue
Thread Starter
TECH Regular
15 Year Member
iTrader: (1)
 
Joined: Apr 2006
Posts: 442
Likes: 1
Default
I'm asking about ANY setup. I wan't to know how it affects it.
Reply
0

Trending Topics

Old Apr 5, 2011 | 09:47 PM
Share
  #8  
wytry's Avatar
wytry
TECH Regular
iTrader: (6)
 
Joined: Oct 2009
Posts: 429
Likes: 0
From: Norton, Ohio
Default
My 232/234 on a 112+4 clears my 62cc 243's just fine.
Reply
0
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Pouria Savadkouei
story-1

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

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

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

 Verdad Gallardo
story-4

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

 Pouria Savadkouei
story-5

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

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
Old Apr 5, 2011 | 10:01 PM
Share
  #9  
intenseblue's Avatar
intenseblue
Thread Starter
TECH Regular
15 Year Member
iTrader: (1)
 
Joined: Apr 2006
Posts: 442
Likes: 1
Default
What I'm saying is how much difference +/- is there by shrinking LSA and advance by two degrees each
Reply
0
Old Apr 6, 2011 | 02:51 PM
Share
  #10  
bluecajun5.3's Avatar
bluecajun5.3
11 Second Truck Club
iTrader: (31)
 
Joined: Jan 2005
Posts: 5,859
Likes: 0
From: Breaux Bridge, LA
Default
2* +/- should net 25 thousandths from what my head porter told me.
Reply
0
Old Apr 6, 2011 | 04:24 PM
Share
  #11  
SNLPerformance's Avatar
SNLPerformance
FormerVendor
iTrader: (15)
 
Joined: Feb 2008
Posts: 3,335
Likes: 2
From: Ft. Worth, TX
Default
Don't quote me on this as ramp rates can effect PTV clearance, but a rule of thumb is ~.010" for every degree earlier. Remember 2* duration opens the valve only 1* earlier
Reply
0
Old Apr 6, 2011 | 07:04 PM
Share
  #12  
intenseblue's Avatar
intenseblue
Thread Starter
TECH Regular
15 Year Member
iTrader: (1)
 
Joined: Apr 2006
Posts: 442
Likes: 1
Default
Originally Posted by bluecajun5.3
2* +/- should net 25 thousandths from what my head porter told me.
Wow, that's more than I was expecting.
Reply
0
Tags
Back to Subforum
Generation III Internal Engine
View Next Unread
Is this 5W 40 Shell Rotella too thick for me?




Advanced Search

All times are GMT -5. The time now is 06:07 PM.

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