Generation IV Internal Engine - C6 LS2 stroker questions

Guys, if I kept my C6, what stroker would be good for 200 shot? I read some of the TSP 427's are not advised for Nitrous or FI. I just thought you guys with experience could help advise me.

Im looking for 500-530rwhp N/A but the ability to run a 200 shot.

It looks like TSP's LS3 418 stroker is my choice so far at only $4200 for the shortblock.

Any ideas? :chug:

Is anybody building a TSP 418?

Why dont you go with 402ci with your LS2 Block and good H/C/I Setup.

Why dont you go with 402ci with your LS2 Block and good H/C/I Setup.

Im still trying to figure it out really. Few more cubes = few more horses.

Bischoff Engines 418 is what I am running and the motor will take a 250 shot all day long

Bischoff Engines LS3 418 is what I am running and the motor will take a 250 shot all day long

Nice, anymore info on it? Any pics of your build?

Guys, if I kept my C6, what stroker would be good for 200 shot? I read some of the TSP 427's are not advised for Nitrous or FI. I just thought you guys with experience could help advise me.

Im looking for 500-530rwhp N/A but the ability to run a 200 shot.

It looks like TSP's LS3 418 stroker is my choice so far at only $4200 for the shortblock.

Any ideas? :chug:


I'm having a custom built LSX455 for my C6. Don't plan to run any dope on it at first, but do plan on it a little later. I know for certain, this engine will swallow a 200 shot without even thinking about it.

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.

A 416 with good heads will net the HP your looking for and be able to handle the spray. I'll pm you with some more information.
The 418 has been bored to a 4.080

JayPlay here is my spec...sorry no pics at this time they were all on my old cellphone but i can get some..i do have an idle clip of it though

6.0 Iron Truck Block

Eagle 4.1" Crank
Eagle Rods
Ross Nitrous Pistons

TEA Stage 3 5.3 heads (Flowed ~330@.600)
Comp 236/248 .617/.617 112LSA Cam
Trick Flow Chromoly Pushrods
Yella Terra Shaft Mount Rockers
Comp Dual Springs
Titanium Retainers and Locks
ARP Head Studs
ARP Main Studs
Cometic Gaskets

Vic Jr Intake port matched to heads
Intakeelbows.com elbow
90mm FAST Throttle Body

Compression is 10.8:1 if i recall. Should make around 630-640hp at the crank on pump gas.

JayPlay here is my spec...sorry no pics at this time they were all on my old cellphone but i can get some..i do have an idle clip of it though

6.0 Iron Truck Block

Eagle 4.1" Crank
Eagle Rods
Ross Nitrous Pistons

TEA Stage 3 5.3 heads (Flowed ~330@.600)
Comp 236/248 .617/.617 112LSA Cam
Trick Flow Chromoly Pushrods
Yella Terra Shaft Mount Rockers
Comp Dual Springs
Titanium Retainers and Locks
ARP Head Studs
ARP Main Studs
Cometic Gaskets

Vic Jr Intake port matched to heads
Intakeelbows.com elbow
90mm FAST Throttle Body

Compression is 10.8:1 if i recall. Should make around 630-640hp at the crank on pump gas.


Great set up. That cam is a bit too big for my needs (A6) but thanks for the info, it helps me decide. :D

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.

A 416 with good heads will net the HP your looking for and be able to handle the spray. I'll pm you with some more information.
The 418 has been bored to a 4.080

Please do. I am looking at a strong shortblock and N20 vs $$$ for a strong shortblock and SC/Turbo.

So the 416 (4" stroke) will swallow a 150-200 shot with no problems? Nice. :D

I'm having a custom built LSX455 for my C6. Don't plan to run any dope on it at first, but do plan on it a little later. I know for certain, this engine will swallow a 200 shot without even thinking about it.

Thats alot of cash my friend but wicked set up no doubt. :thumb:

Thats alot of cash my friend but wicked set up no doubt. :thumb:

Thanks man... It should be completely built, installed and tuned by the 25th/26th of this month. :devil:

I will be putting a 200 shot on my car very soon :devil:

I'm having a custom built LSX455 for my C6. Don't plan to run any dope on it at first, but do plan on it a little later. I know for certain, this engine will swallow a 200 shot without even thinking about it.

Ineresting. Tell us about the build what stroke and bore

Please do. I am looking at a strong shortblock and N20 vs $$$ for a strong shortblock and SC/Turbo.

So the 416 (4" stroke) will swallow a 150-200 shot with no problems? Nice. :D

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.

Ineresting. Tell us about the build what stroke and bore

New GM LSX block
Callies 4.250 forged crankshaft
Callies Compstar 6.100 rods with ARP 2000 rod bolts
Custom 4.130 Diamond pistons/ total seal piston rings
ACL Race main and rod Bearings
World Products (Warhawk LSX) 235cc heads (ported by ARD)
Custom ground Comp Cam billet core
Comp cams comp R lifters
Comp cams Chromemoly pushrods
Melling high flow oil pump
ARP LSX head studs ARP 2000 material
Rollmaster timing chain
Cometic custom head gaskets
gaskets - (oil pan, front cover, valley pan, header gaskets)
NGK sparg plugs TR6
Spec stage 4F full face disk and pressure plate
Spec aluminium flywheel
New GM slave cylinder/ and throw out bearing

Nice, similar to my build, 4.135 bore x 4.250 stroke for a 457. I'm using a sleeved LS2 block.

Nice, similar to my build, 4.135 bore x 4.250 stroke for a 457. I'm using a sleeved LS2 block.

Have you completed the engine as of yet? If so, what were the final numbers. I'm more interested in torque and when it comes on. Ideally (for me), it peaks early (2400-2600rpms), but continues to pull aggresively through 7,000rpms.

Did you happen to use a 235cc head as well? What was the cam you chose?

Why dont you go with 402ci with your LS2 Block and good H/C/I Setup.

This does seem to be the best $$$ route to go. Does anyone have any advice between the TSP 402 or the Livernois 404 kit? I will need to find a local South Florida shop to assemble the shortblock. Any advice?

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/12590124/IntakeManifoldL76L92CarBareManifold.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.

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/12590124/IntakeManifoldL76L92CarBareManifold.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.

Dude youre right on the money! My plan includes TSP L92's with a ported LS3/L76and I had Pat G. already spec me a cam. :D

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.

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.

Actually I just wanted some opinions. It would be a bit easier for me to yank the engine and do most of it myself and save the $$$. Im wondering what a 402-404 LS2 would run the 1/4 with a med (226-228/600/114) cam in the A6? I know Evil traps 124 with only L92 H/C 6.0 but I am looking for something close to C6Z performance. I may have to jump ship and grab a C6Z to accomplish what I need. Im very indecisive at this point.

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.

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.


Hey Chris, what size shot seems safe on a cammed LS7? :confused:

Hey 99blancoSS What will the compression be to get that 416 to do 550 rwhp??? And is that using L92 heads????/Ineresting. Tell us about the build what stroke and bore

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.

Hey Chris, what size shot seems safe on a cammed LS7? :confused:

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

[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?

looks like a ncie build