So that would be 418ci?

 

I run the 6.0 LS2 aluminum block, 4.30 bore & 4.100 stroke =418cid. I been running this motor for over five years now. And still runs grate, and with nitrous. times in my sig. from a few weeks ago. and i shift at 7400 rpm.

 

Did you have to fly cut with that cam?

 

Yes they are fly cut , The pistons are a custom forged pistons from ROSS .I had them custom made. They had never made this cubic inch & stroke combo before. That was five years ago thow.

 

Another ?? Can i just drop a 4 inch crank in a Lq4? Or does it have to be clearenced (ie) like sbc 383?

 

Subscribed....

 

LQ4/9 and LS2 blocks do not require clearancing of the block to accomodate a 4.00" stroke. I believe all LS motors will without any work.

 

OK thanks. Can you put a 4 inch crank in a ls1 346?

 

You can put a 4" in any LS style block, I have a 4.100" and only had to clearace for the rod bolts and not much for them.

 

What would be a, "small nitrous" amount? I've spoken with a couple people about that and have received very different answers.

 

150hp IMO small nitrous

Fraser

 

Right now i run a LS2 4.30 bore and run a 250 shot , and it been on nitrous for five years now and steal run grate. You can see in my sig. what the motor has in it, Im starting a new build with the LS3 with a 4.80 bore and going the run a 250 shot on it also.

 

Whats the max safe bore for an ls2 block?
Whats the max safe bore for a cast 6.0 block?

 

LS2 block 4.035" (GM reman LS2 blocks have 4.020" pistons installed)
6.0 iron block 4.065-4.080" (LQ4/LQ9/LY6)

for power adder I generally keep 6.0 iron blocks to 4.030"

odd thing I see, the 6.0 blocks with cracked bores are mostly short head bolt versions, not saying it happens to all 2004+ blocks seen atleast 5 newer style iron blocks with cracked bores.

 

We have 427 iron short block packages. http://www.schwankeshortblocks.com/shopping/?ic=1216

4.065 bore x 4.125 stroke. We did have one 4.080" bore in a race car a while back. I think the solid roller valvetrain broke halfway through the season, but the bores were fine.

As was stated, any boost or heavier dose, over 150, go with the 4.030 bore.

 

I wouldn't recommend anything over a 3.9 stroke on an LS2 or LQ9 build.

 

Who makes a 3.9 stroke crank? Seems like a odd stroke to me

 

I think were going to go with a 408 and a 250 shot (its going to be carbrated). What would be a good head cnc'd l92s?

 

its not odd, Eagle used to make a 3.9 crank, I think only K1 makes a 3.9 crank other then callies magnum 3.9

Our 390ci engine uses a 3.825" stroke, you end up with a better piston overall by using shorter stroke.

 

How did you pull 438CI from a 6.0?


Right now I my pistons are a .005 (415CI), but I want to go bigger 425CI+


As for my setup:
Block: Pre 04 LQ4
Crank: Callies Magnum XL 4.125
Rods: Callies 6.125
Pistons: Wisco custom .005
Heads: WCCH Stg3 L92
Cam: ???

DM