Specs of LS2 Stock Cam?
#5
The GMPP catalog shows it the same as the LS1 cam:
Under "LS Crate Engines" (pp 64 - 72):
engine PN HP lift duration
LS1 17801267 350 .500/.500 200/203
LS6 17801268 405 .525/.525 204/211
LS2 19156261 400 .500/.500 200/203
They don't give LSA
However, under "LS series camshafts" (p 190):
application PN duration lift LSA
LS1 2001-2004 12561721 196/201 .467/.479 116
LS6 2001 12560950 207/217 .525/.525 116
LS6 2002-2004 12565308 204/218 .550/.550 117.5
So I don't know, and I'm not sure GM knows!
Under "LS Crate Engines" (pp 64 - 72):
engine PN HP lift duration
LS1 17801267 350 .500/.500 200/203
LS6 17801268 405 .525/.525 204/211
LS2 19156261 400 .500/.500 200/203
They don't give LSA
However, under "LS series camshafts" (p 190):
application PN duration lift LSA
LS1 2001-2004 12561721 196/201 .467/.479 116
LS6 2001 12560950 207/217 .525/.525 116
LS6 2002-2004 12565308 204/218 .550/.550 117.5
So I don't know, and I'm not sure GM knows!
#7
Burning Brakes
The GMPP catalog shows it the same as the LS1 cam:
Under "LS Crate Engines" (pp 64 - 72):
engine PN HP lift duration
LS1 17801267 350 .500/.500 200/203
LS6 17801268 405 .525/.525 204/211
LS2 19156261 400 .500/.500 200/203
They don't give LSA
However, under "LS series camshafts" (p 190):
application PN duration lift LSA
LS1 2001-2004 12561721 196/201 .467/.479 116
LS6 2001 12560950 207/217 .525/.525 116
LS6 2002-2004 12565308 204/218 .550/.550 117.5
So I don't know, and I'm not sure GM knows!
Under "LS Crate Engines" (pp 64 - 72):
engine PN HP lift duration
LS1 17801267 350 .500/.500 200/203
LS6 17801268 405 .525/.525 204/211
LS2 19156261 400 .500/.500 200/203
They don't give LSA
However, under "LS series camshafts" (p 190):
application PN duration lift LSA
LS1 2001-2004 12561721 196/201 .467/.479 116
LS6 2001 12560950 207/217 .525/.525 116
LS6 2002-2004 12565308 204/218 .550/.550 117.5
So I don't know, and I'm not sure GM knows!
Camshaft Lobe Lift - Intake
7.78 mm
0.306 in
Camshaft Lobe Lift - Exhaust
7.77 mm
0.305 in
If lobe lift is multiplied by the 1.7 rocker arm ratio, valve lift comes out to .5202" intake and .5185" exhaust. Also, according to my info duration is 204 intake and 211 exhaust. Page 6-18 of the service manual states both intake and exhaust valve lift is .52" which is probably a rounded figure compared to my calculated valve lift.
LS2 crate engine specs are different according to your info. Is the crate engine cam different than what is installed in a Corvette? If so, the installed engine may make more power.
Last edited by Marina Blue; 04-25-2008 at 03:10 PM.
#10
Safety Car
Intake is the same as the 2002 - 2004 LS6 and the exhaust is a slight tweak of the '01 LS6 and the LS2
MY08 LS3 Int
267° 204° .551 in
118°
MY08 LS3 Exh
275° 211° .525 in
115°
Source: http://corvetteactioncenter.com/spec...ls3_page6.html
MY08 LS3 Int
267° 204° .551 in
118°
MY08 LS3 Exh
275° 211° .525 in
115°
Source: http://corvetteactioncenter.com/spec...ls3_page6.html