LS2 HEADS on a LS1
Drifting
Joined: Jun 2002
Posts: 1,847
Likes: 1
From: Iowa
Cruise-In IV Veteran
Cruise-In V Veteran
Originally Posted by mdhmi
The heads will fit, but wont add 25 hp to a bone stock car.
Mark
Mark
Ok, but what will they do for a bone stock car?
What else needs to be done to the LS1 in order to use the LS2 heads?......surely you don't just bolt them on and drive off, do ya?
And for an LS1 that has a mild street cam and headers, is it worth the effort to add the LS2 heads?
Just sitting here eating my popcorn, and wondering.
Race Director
Joined: Nov 2005
Posts: 14,553
Likes: 1,549
From: Supporting the Corvette Community at Abel Chevrolet in Rio Vista, CA 707-374-6317 Ext.123
St. Jude Donor '08
Originally Posted by chriswtx
LS2 heads are the same port design as LS6 heads. I think they are the same castings... Just the LS2 heads have solid valves where the LS6 heads have hollow valves..
Burning Brakes
Joined: Aug 2004
Posts: 837
Likes: 2
From: Derry NH
I can tell you what they are worth in a few weeks. I placed my order today for LS2 heads and a TSP cam. From the dyno charts I have seen the LS6 (LS2) heads will actually support some pretty hearty setups. To each his own, I am not trying to make a 10 sec car.
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Drifting
Joined: Nov 2005
Posts: 1,406
Likes: 0
From: Dallas Tx
I think i heard somewhere that they use a slightly different legnth valve then the LS6 head and therefore need a different legnth pushrod. Anybody else read that anywyere? Or am i just dreaming crap up? lol
Shane
Shane
Pro
Joined: Aug 2004
Posts: 678
Likes: 0
From: Boise ID
Hi Shane,
I was just checking your dyno link on the "before and after LG header swap". Was that all that was done to get the extra 31 hp/38 torque? Was the rest of the exhaust stock? Was there a tune done after the swap?
Nice numbers if it was only the headers. Is that typical for that upgrade?
I'll be interested to hear the details.
Thanks,
Keith
I was just checking your dyno link on the "before and after LG header swap". Was that all that was done to get the extra 31 hp/38 torque? Was the rest of the exhaust stock? Was there a tune done after the swap?
Nice numbers if it was only the headers. Is that typical for that upgrade?
I'll be interested to hear the details.
Thanks,
Keith
Originally Posted by Shane_S
I think i heard somewhere that they use a slightly different legnth valve then the LS6 head and therefore need a different legnth pushrod. Anybody else read that anywyere? Or am i just dreaming crap up? lol
Shane
Shane
Safety Car
Joined: Jul 2001
Posts: 4,661
Likes: 67
From: Ocean Springs MS
Originally Posted by BoiseVette
Hi Shane,
I was just checking your dyno link on the "before and after LG header swap". Was that all that was done to get the extra 31 hp/38 torque? Was the rest of the exhaust stock? Was there a tune done after the swap?
Nice numbers if it was only the headers. Is that typical for that upgrade?
I'll be interested to hear the details.
Thanks,
Keith
I was just checking your dyno link on the "before and after LG header swap". Was that all that was done to get the extra 31 hp/38 torque? Was the rest of the exhaust stock? Was there a tune done after the swap?
Nice numbers if it was only the headers. Is that typical for that upgrade?
I'll be interested to hear the details.
Thanks,
Keith
Le Mans Master
Joined: Sep 2003
Posts: 6,276
Likes: 227
From: Farmington CT
Cruise-In VII Veteran
the 2001 valves are not sodium filled, and the the valves are the same length as ls1, the .525 cam doens't use a different base circle, correct me if i'm wrong
the 243 castings are the same 01-06, 'castings'
the 243 castings are the same 01-06, 'castings'
Pro
Joined: Aug 2004
Posts: 678
Likes: 0
From: Boise ID
Thanks! 
Originally Posted by fdxpilot
Shane's numbers are about right for LG LTs with a tune. With that setup, I went from 310 rwhp/328 rwtq to 340 rwhp/354 rwtq. That's on an 02 MN6 with hi-flow cats and LG doing the tuning.
Drifting
Joined: Nov 2005
Posts: 1,406
Likes: 0
From: Dallas Tx
Originally Posted by fdxpilot
Shane's numbers are about right for LG LTs with a tune. With that setup, I went from 310 rwhp/328 rwtq to 340 rwhp/354 rwtq. That's on an 02 MN6 with hi-flow cats and LG doing the tuning.
Yep, headers & tune. Not bad for a ~100k mile car that was stock its whole life before i got it.
Shane
Drifting
Joined: Nov 2005
Posts: 1,406
Likes: 0
From: Dallas Tx
Originally Posted by connecticut
the 2001 valves are not sodium filled, and the the valves are the same length as ls1, the .525 cam doens't use a different base circle, correct me if i'm wrong
the 243 castings are the same 01-06, 'castings'
the 243 castings are the same 01-06, 'castings'
I believe in 02 the casting changed very very slightly but still kept the #243 casting number. That's also when the LS6 started coming with the Yellow springs if i remember correctly. Although I could be wrong on that one.
Shane
Safety Car
Joined: Jun 2003
Posts: 4,510
Likes: 240
From: Coconut Creek FL
Originally Posted by Shane_S
I believe in 02 the casting changed very very slightly but still kept the #243 casting number. That's also when the LS6 started coming with the Yellow springs if i remember correctly. Although I could be wrong on that one.
Shane
Shane
I just bought a set of NEW LS6 heads from a forum member who purchased the 04 crate engine over a year and a half ago- the springs are not yellow, they are steel color with a blue paint line down one side. They are casting number "243" so I guess GM has is was switching springs on engines.
