C6 LS2 stroker questions
TECH Regular
Joined: Nov 2005
Posts: 459
Likes: 0
From: Arlington, TN
Get a 402 stroker kit (crank, rods, pistons, bearings, & rings) for your LS2 and then put the extra cash into a set of L92 heads & L76 manifold & custom cam.
Texas Speeds PRC L92's with .650" springs run $1449 for a SET (ETP's and Trickflow go for twice that price).
The LS3/L76 bare manifold runs $224 (SDParts). This would allow you to carry over your throttlebody and fuel rails. I would advise getting a set of 39lb LS3/LS7 injectors though.
Speed Inc has a Compstar Speed Pack rotating assembly that would turn your LS2 into a 402 for around $2400.
Note: A rotating assembly for your motor will need the 4.005" pistons and a x58 crank reluctor. (06 & 07 C6 LS2's should be the x58, where the 05's are x24).
The wall thickness on the LS2 should not have a problem with a 150 to 200 shot, just gotta remember to run the tune rich when you spray.
Keeping your block -vs- buying a shortblock will save you a small amount of cash, at the cost of having the car in the shop longer.
Links for pricing comparisons:
TSP L92's http://texas-speed.com/shop/item.asp?itemid=697
Speed Inc's rotating assembly - http://www.speedinc.com/cont.cfm?cid=C0000184
SD's L76 bare manifold - http://www.sdparts.com/product/12590...eManifold.aspx
I forgot - You will need 8 L92 intake rocker arms for the heads and probably something like the LG G6x3 for the cam which is designed for the L92 heads. Actually that cam in a worked over 6.0 comes close to 500 rwhp. so your 500 to 525 na 402 should be right on the money.
Texas Speeds PRC L92's with .650" springs run $1449 for a SET (ETP's and Trickflow go for twice that price).
The LS3/L76 bare manifold runs $224 (SDParts). This would allow you to carry over your throttlebody and fuel rails. I would advise getting a set of 39lb LS3/LS7 injectors though.
Speed Inc has a Compstar Speed Pack rotating assembly that would turn your LS2 into a 402 for around $2400.
Note: A rotating assembly for your motor will need the 4.005" pistons and a x58 crank reluctor. (06 & 07 C6 LS2's should be the x58, where the 05's are x24).
The wall thickness on the LS2 should not have a problem with a 150 to 200 shot, just gotta remember to run the tune rich when you spray.
Keeping your block -vs- buying a shortblock will save you a small amount of cash, at the cost of having the car in the shop longer.
Links for pricing comparisons:
TSP L92's http://texas-speed.com/shop/item.asp?itemid=697
Speed Inc's rotating assembly - http://www.speedinc.com/cont.cfm?cid=C0000184
SD's L76 bare manifold - http://www.sdparts.com/product/12590...eManifold.aspx
I forgot - You will need 8 L92 intake rocker arms for the heads and probably something like the LG G6x3 for the cam which is designed for the L92 heads. Actually that cam in a worked over 6.0 comes close to 500 rwhp. so your 500 to 525 na 402 should be right on the money.
Last edited by Bring the Noise; Sep 7, 2008 at 01:49 AM. Reason: Forgot some parts.
Get a 402 stroker kit (crank, rods, pistons, bearings, & rings) for your LS2 and then put the extra cash into a set of L92 heads & L76 manifold & custom cam.
Texas Speeds PRC L92's with .650" springs run $1449 for a SET (ETP's and Trickflow go for twice that price).
The LS3/L76 bare manifold runs $224 (SDParts). This would allow you to carry over your throttlebody and fuel rails. I would advise getting a set of 39lb LS3/LS7 injectors though.
Speed Inc has a Compstar Speed Pack rotating assembly that would turn your LS2 into a 402 for around $2400.
Note: A rotating assembly for your motor will need the 4.005" pistons and a x58 crank reluctor. (06 & 07 C6 LS2's should be the x58, where the 05's are x24).
The wall thickness on the LS2 should not have a problem with a 150 to 200 shot, just gotta remember to run the tune rich when you spray.
Keeping your block -vs- buying a shortblock will save you a small amount of cash, at the cost of having the car in the shop longer.
Links for pricing comparisons:
TSP L92's http://texas-speed.com/shop/item.asp?itemid=697
Speed Inc's rotating assembly - http://www.speedinc.com/cont.cfm?cid=C0000184
SD's L76 bare manifold - http://www.sdparts.com/product/12590...eManifold.aspx
I forgot - You will need 8 L92 intake rocker arms for the heads and probably something like the LG G6x3 for the cam which is designed for the L92 heads. Actually that cam in a worked over 6.0 comes close to 500 rwhp. so your 500 to 525 na 402 should be right on the money.
Texas Speeds PRC L92's with .650" springs run $1449 for a SET (ETP's and Trickflow go for twice that price).
The LS3/L76 bare manifold runs $224 (SDParts). This would allow you to carry over your throttlebody and fuel rails. I would advise getting a set of 39lb LS3/LS7 injectors though.
Speed Inc has a Compstar Speed Pack rotating assembly that would turn your LS2 into a 402 for around $2400.
Note: A rotating assembly for your motor will need the 4.005" pistons and a x58 crank reluctor. (06 & 07 C6 LS2's should be the x58, where the 05's are x24).
The wall thickness on the LS2 should not have a problem with a 150 to 200 shot, just gotta remember to run the tune rich when you spray.
Keeping your block -vs- buying a shortblock will save you a small amount of cash, at the cost of having the car in the shop longer.
Links for pricing comparisons:
TSP L92's http://texas-speed.com/shop/item.asp?itemid=697
Speed Inc's rotating assembly - http://www.speedinc.com/cont.cfm?cid=C0000184
SD's L76 bare manifold - http://www.sdparts.com/product/12590...eManifold.aspx
I forgot - You will need 8 L92 intake rocker arms for the heads and probably something like the LG G6x3 for the cam which is designed for the L92 heads. Actually that cam in a worked over 6.0 comes close to 500 rwhp. so your 500 to 525 na 402 should be right on the money.
The biggest thing is I am still considering selling it and getting a C6Z, so I am really weighing my options now. The offset rockers and pedastals are sitting in my garage already but I would step up to Harlands anyway.
I assume the LS7 has the same concern (stroke) running a 100-150 shot though?
LOL, I thought you were talking about a 416...LOL
An LS2 403 would be fine for as much n20 as you want to run. Your block is clean up .005 to make it a 403. As long as you dont go to big on the cam the heads and intake setup will be fine.
An LS2 403 would be fine for as much n20 as you want to run. Your block is clean up .005 to make it a 403. As long as you dont go to big on the cam the heads and intake setup will be fine.
Idealy, a high 10 @ 127+ shouldnt be out of the question with the 402 w/L92's and a great tune with a little traction. You think? Not many A6 guys to mirror.
Hey Chris, what size shot seems safe on a cammed LS7?
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Joined: Apr 2008
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Hey 99blancoSS What will the compression be to get that 416 to do 550 rwhp??? And is that using L92 heads????/
pm'ed you. Basicaly the n2o and boosted block is the same, the n/a block can be different.
We dont recommned anything bigger than a 4" stroke for a power add due to the sleeve length.
Also for a power add iron is always better than aluminum. Aluminum expands at a quicker rate than iron/steel does. The iron block will be more durable.
Our 434 is for big FI applications. 1500-2000 hp.
The 408 will handle all you can throw at it as well so really it alld epend on how much power you are looking to make. Bigger cubes make bigger power. BUT our 454 is for non power add applications.
We go 4.155 x 4" stroke for power add and 4.185 x 4.100 for n/a on the LSX block.
You could have a 416 at 550 rwhp before you hit it with a 200 shot and be fine. Obviously anything you can do with aluminum you can do with iron
So it's all about budget really. A s/c or turbo will cost more than a nitrous setup but the shortblock cost is the same.
We dont recommned anything bigger than a 4" stroke for a power add due to the sleeve length.
Also for a power add iron is always better than aluminum. Aluminum expands at a quicker rate than iron/steel does. The iron block will be more durable.
Our 434 is for big FI applications. 1500-2000 hp.
The 408 will handle all you can throw at it as well so really it alld epend on how much power you are looking to make. Bigger cubes make bigger power. BUT our 454 is for non power add applications.
We go 4.155 x 4" stroke for power add and 4.185 x 4.100 for n/a on the LSX block.
You could have a 416 at 550 rwhp before you hit it with a 200 shot and be fine. Obviously anything you can do with aluminum you can do with iron
So it's all about budget really. A s/c or turbo will cost more than a nitrous setup but the shortblock cost is the same.
Well with the sleeve issue I'm not sure I'd run n2o but if I did I'd be conservative and say 100. Tuning is the key. I've seen some pics of sleeves split from top to bottom. So added cylinder pressure and detonation can be fatal for it. Not sure FI or N20 is a great idea there.... but I might be a bit conservative.
Others will say there isnt an issue an spray the hell out of it ...LOL
Others will say there isnt an issue an spray the hell out of it ...LOL
[QUOTE=99blancoSS;10050126]We do an LS3 416... 4.070 bore x 4" stroke you can juice is all day long if you want.
The reason a 427 is not a good idea for the power add is the 4.100 stroke.
i'm gettin ready to put an ls2 block together and was thinkin 4.1 stroke crank with 200 to 300 shot. your sayin thats not a good idea with a 4.1 crank? wat are the issues you've seen?
The reason a 427 is not a good idea for the power add is the 4.100 stroke.
i'm gettin ready to put an ls2 block together and was thinkin 4.1 stroke crank with 200 to 300 shot. your sayin thats not a good idea with a 4.1 crank? wat are the issues you've seen?
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