Generation IV Internal Engine 2005-2014 LS2 | LS3 | LS7 | L92 | LS9

Reduce the C.R for C6Z06 !! How ??

Thread Tools
 
Search this Thread
 
Old Oct 18, 2009 | 01:54 PM
  #1  
Kuwaity's Avatar
Thread Starter
Teching In
 
Joined: Apr 2009
Posts: 4
Likes: 0
Default Reduce the C.R for C6Z06 !! How ??

Hello guys,

I have 09' z06, I plan to supercharge it to have fun and most of vette guys said that the LS7 had high compression ratio so you need to reduce the C.R by have full Forged Shortblock. I see there no reason to have forged shortblock and spend alot of money " I DONT MEAN THAT I AM THE SMARTER" but i think if i change the oringinal pistons/Rods with forged and keep the stock crankshaft, that will be enough to reduce the C.R .

I could be wrong guys beacuse this is my first vette so i hope that you help me to spend reasonably money to kill the so-called ZR1 .. I decided to either SC or keep it stock ..



So What you think guys? I'm all ears to your Opinions/Suggestions .

Regards.
Reply
Old Oct 18, 2009 | 02:16 PM
  #2  
Fbodyjunkie06's Avatar
10 Second Club
iTrader: (10)
 
Joined: Mar 2009
Posts: 4,712
Likes: 5
From: Greensboro, NC
Default

Larger CC heads will lower your compression ratio as will a thicker headgasket. You don't need to get new pistons just to lower it even though that is one way to do it.
Reply
Old Oct 18, 2009 | 03:14 PM
  #3  
G Engines's Avatar
Launching!
 
Joined: Sep 2009
Posts: 260
Likes: 0
From: greensboro, nc
Default

That is one way to lower the compression, but you should change the rings to handle the boost if you want to stay on a cheep budget. If you use the stock crank try not to go over 17 psi of boost much more than that it starts flexing the stock crank.
Reply
Old Oct 18, 2009 | 03:27 PM
  #4  
Kuwaity's Avatar
Thread Starter
Teching In
 
Joined: Apr 2009
Posts: 4
Likes: 0
Default

Originally Posted by G Engines
That is one way to lower the compression, but you should change the rings to handle the boost if you want to stay on a cheep budget. If you use the stock crank try not to go over 17 psi of boost much more than that it starts flexing the stock crank.
13 psi in enough to me..
Reply
Old Oct 18, 2009 | 04:46 PM
  #5  
JUNK's Avatar
TECH Apprentice
 
Joined: Dec 2008
Posts: 333
Likes: 0
From: Westbank of N.O.
Default

Be advised that the combustion chamber of the ls7 head is already 72cc, and I strongly advise against thicker head gaskets, as u will loose "quench" and may even be more prone to detonation than if the stock gaskets were in place. Have u considered high comp/low boost for now? Honestly, for your boost level, bushed stock rods with Katech bolts and low comp. forged pistons with the PROPER ring gaps are the best way to go. Using a little meth, the LS7 will put OVER 700hp to the wheels boosted using a stock short block and high compression. And no, it won't go BOOM.......tune it fat and keep the detonation out of it (no beginner tuners here).
Reply
Old Oct 18, 2009 | 06:43 PM
  #6  
spaz1's Avatar
12 Second Club
iTrader: (9)
 
Joined: Apr 2008
Posts: 629
Likes: 1
From: Calgary Ab. Canada
Default

I would stick some low compression forged pistons in with steel top ring or hell fire rings and arp rod bolts and be done with it.
Reply




All times are GMT -5. The time now is 12:12 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