LS2 technical specifications thread.
Thread Starter
☠☣☢ Semper Ebrius ☢☣☠
Joined: Jun 2001
Posts: 83,301
Likes: 4
From: Virginia
Cruise-In IV-V-VI-VII Veteran
St. Jude's Donor '06
LS2 technical specifications thread.
It would be nice to have all of the LS2 tech specs in one thread for those of us who give a crap.
As people correct me or provide more info, I'll update this first post so that it's all together in one place.
Here's what I have:
4 inch bore
3.62 inch stroke
Flat-top piston
6,500 RPM redline
90mm single-blade throttle body
2 inch intake valve
1.55 inch exhaust valve
10.9:1 compression ratio
Intake port 210cc
Chamber 64.45cc
555 CFM induction
SFI
.525 Intake valve lift
.525 Exhaust valve lift
117.5 Lobe center angle (cam degrees)
121 Intake centerline (crank degrees)
204 Intake duration (crank degrees)
211 Exhaust duration (crank degrees)
19 ATDC Intake valve open @ .050
43 ABDC Intake valve close @ .050
42 BBDC Exhaust valve open @ .050
4 BTDC Exhaust valve close @ .050
1.7:1 rocker ratio
4.4" bore center spacing
4 bolt main caps with two horizontal cross bolts
Deck height: 9.24 inches (234.57-234.82 mm tolerance)
Con Rod length: 6.1" (154.94 mm)
What I want:
Head gasket bore and thickness (compressed)
Block length
Intake port CCs
Chamber CCs
Ignition timing (advance/retard)
Intake plenum design
Exhaust header diameter
Exhaust collector diameter
Muffler inlet diameter
Muffler outlet diameter
Anything else you can think of
As people correct me or provide more info, I'll update this first post so that it's all together in one place.
Here's what I have:
4 inch bore
3.62 inch stroke
Flat-top piston
6,500 RPM redline
90mm single-blade throttle body
2 inch intake valve
1.55 inch exhaust valve
10.9:1 compression ratio
Intake port 210cc
Chamber 64.45cc
555 CFM induction
SFI
.525 Intake valve lift
.525 Exhaust valve lift
117.5 Lobe center angle (cam degrees)
121 Intake centerline (crank degrees)
204 Intake duration (crank degrees)
211 Exhaust duration (crank degrees)
19 ATDC Intake valve open @ .050
43 ABDC Intake valve close @ .050
42 BBDC Exhaust valve open @ .050
4 BTDC Exhaust valve close @ .050
1.7:1 rocker ratio
4.4" bore center spacing
4 bolt main caps with two horizontal cross bolts
Deck height: 9.24 inches (234.57-234.82 mm tolerance)
Con Rod length: 6.1" (154.94 mm)
What I want:
Head gasket bore and thickness (compressed)
Block length
Intake port CCs
Chamber CCs
Ignition timing (advance/retard)
Intake plenum design
Exhaust header diameter
Exhaust collector diameter
Muffler inlet diameter
Muffler outlet diameter
Anything else you can think of
Last edited by Scissors; Apr 20, 2005 at 07:13 PM.
Burning Brakes
Joined: Dec 2004
Posts: 1,234
Likes: 2
From: New Jersey
Thread Starter
☠☣☢ Semper Ebrius ☢☣☠
Joined: Jun 2001
Posts: 83,301
Likes: 4
From: Virginia
Cruise-In IV-V-VI-VII Veteran
St. Jude's Donor '06
Originally Posted by Mighty-Mouse
I just wish I could get definitive information on the stuff I don't have.
Drifting
Joined: Nov 2002
Posts: 1,651
Likes: 125
From: laguna niguel ca
camshaft specs incorrect.
What you listed was the 2004 Z06 specs. The cam used in the LS2 is the early 385hp Z06 cam Lift; .525 intake and exhaust. It would be nice if they did use the later cam. Here's a inexpensive option: I tested a LS2 spring, and with 1.8 rockers you bump the cam to .556 lift intake and exhaust. This gives you 100lbs seat pressure at an installed height of 1.80, and 300lbs at .556 lift. With .065 to coil bind. Cheaper than a cam change. Should be good for 12-15 RWHP. Jessel rockers are about $700. You would need to check pushrod length. Stock 7.4 might work, but you might need a shorter length.
Andy G.
Andy G.
Racer
Joined: Jan 2005
Posts: 363
Likes: 0
From: Bridgewater New Jersey
Racer
Joined: Nov 2004
Posts: 472
Likes: 22
Originally Posted by Scissors
What I want:
Type of piston, dome, etc?
Type of piston, dome, etc?
the piston assembly comes with the wrist pin and retaining o-rings. the skirts are covered
with an anti-friction coating. manufactured by www.mahle.com
i can take a pic if youre interested.
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Racer
Joined: Nov 2004
Posts: 472
Likes: 22
Originally Posted by need-for-speed
how much did thaat piston cost? that would make a cool paerweight
Rings are 17.81 each
Rods are 76.43 each
those prices are from Fred Beans last month, youll have to check with him for a current quote.
im not sure what the "over the counter" price is from a GM dealer.
Last edited by Asterism; Mar 2, 2005 at 11:00 PM.
Thread Starter
☠☣☢ Semper Ebrius ☢☣☠
Joined: Jun 2001
Posts: 83,301
Likes: 4
From: Virginia
Cruise-In IV-V-VI-VII Veteran
St. Jude's Donor '06
Originally Posted by Asterism
Pistons are 40.40 each (includes the wrist pin and retaining o-rings)
Rings are 17.81 each
Rods are 76.43 each
Rings are 17.81 each
Rods are 76.43 each
Pro
Joined: Oct 2004
Posts: 546
Likes: 1
From: CA
Originally Posted by Scissors
Bump to find out if anything else has been learned by anyone.
http://www.ls1tech.com/forums//showthread.php?t=200043
Safety Car
Joined: Nov 2003
Posts: 4,979
Likes: 5
From: San Diego, CA "leaf" "tee" "e"
Originally Posted by Scissors
What I want:
Deck height: 234.57-234.82 mm
Deck height: 234.57-234.82 mm
http://www.crossedflags.com/nuke/htm...download&cid=2
Pro
Joined: Oct 2004
Posts: 546
Likes: 1
From: CA
Originally Posted by Scissors
Bump to find out if anything else has been learned by anyone.
including at con rod length:
http://www.speedvisionwc.com/competi...illac-ctsv.pdf
