Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

To port or not to port

Thread Tools
 
Search this Thread
 
Old Dec 26, 2011 | 10:32 AM
  #1  
BRYCEROCKET's Avatar
Thread Starter
Teching In
10 Year Member
iTrader: (3)
 
Joined: Aug 2011
Posts: 39
Likes: 0
From: stockton, ca
Smile To port or not to port

I recently purchased a set of ls6 heads for my ls1. Im looking for 400 rwhp through an m6. Is it worth the 500 bucks to have them ported? Because I am going to be running nitrous to get to my 500 rwhp goal. Thanks for the help
Reply
Old Dec 26, 2011 | 11:44 AM
  #2  
Ronny_02_WS6's Avatar
TECH Enthusiast
iTrader: (6)
 
Joined: Aug 2011
Posts: 540
Likes: 2
From: El Paso, TX
Default

It depends on the Cam, what cam are you getting?
Reply
Old Dec 26, 2011 | 12:28 PM
  #3  
BRYCEROCKET's Avatar
Thread Starter
Teching In
10 Year Member
iTrader: (3)
 
Joined: Aug 2011
Posts: 39
Likes: 0
From: stockton, ca
Default

I was gonna order up a custom grind, but it depends if I have these heads ported or not
Reply
Old Dec 26, 2011 | 12:45 PM
  #4  
2QUIK4U's Avatar
TECH Enthusiast
iTrader: (7)
 
Joined: Oct 2006
Posts: 707
Likes: 0
From: Chesterfield,Va
Default

You should be able to hit 400rwhp pretty easy with those heads stock and a relatively mild cam. I just went through the same debate. I ended up just having a valve job done on the heads and having them milled .0030 to bump the compression. My particular combo should make at least 420rwhp. I will have numbers in a couple weeks once I get it all together.
Reply
Old Dec 26, 2011 | 01:13 PM
  #5  
BRYCEROCKET's Avatar
Thread Starter
Teching In
10 Year Member
iTrader: (3)
 
Joined: Aug 2011
Posts: 39
Likes: 0
From: stockton, ca
Default

2QUIK4U I see you have a 73Z, will a truck intake fit yr car? Because I'm putting this motor in my 69. LS6 Intakes setups are $$$$
Reply
Old Dec 26, 2011 | 05:41 PM
  #6  
jimmyblue's Avatar
Moderator
iTrader: (11)
 
Joined: Mar 2002
Posts: 12,604
Likes: 7
From: East Central Florida
Default

Home-porting mine set me back a week's worth of evenings and under
$50 for the electric die grinder and long shank burrs. But I can't claim
to have made great gains, just that I didn't screw anything up.
Reply
Old Dec 26, 2011 | 05:57 PM
  #7  
2QUIK4U's Avatar
TECH Enthusiast
iTrader: (7)
 
Joined: Oct 2006
Posts: 707
Likes: 0
From: Chesterfield,Va
Default

Originally Posted by BRYCEROCKET
2QUIK4U I see you have a 73Z, will a truck intake fit yr car? Because I'm putting this motor in my 69. LS6 Intakes setups are $$$$
Not sure if it will fit under the stock hood. I have a small cowl hood on my car. If I were to guess I would say it would fit.

Originally Posted by jimmyblue
Home-porting mine set me back a week's worth of evenings and under
$50 for the electric die grinder and long shank burrs. But I can't claim
to have made great gains, just that I didn't screw anything up.
I agree. I did very slight porting on mine as well. The area behind the valves seemed to have the most imperfections in the casting.
Reply




All times are GMT -5. The time now is 04:53 PM.

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