how big on an LS2?
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TECH Resident
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From: strong island, NY
Question about stroking a LS2 motor... which options do we have? i've heard of many, beside the infamous 402and 427-but what exactly can you make out of your LS2? Can the 390 and 383 still be done? post up...
Last edited by MyWs62FaST4u; Nov 25, 2006 at 03:18 PM.
The 4" bore of the LS2 block and a 4" stroke crank will make a 402ci. You can bore the sleeves up to .030" and run a Eagle 4.100" crank for a 418ci. This is with NO sleeving.
If you want to sleeve, you can run Darton LS7 sleeves (in the LS2 block) which will go out to a 4.190" bore. This coupled with a 4.250" stroke crank will net you a 469ci. That's about the max you can do until Darton finishes the 4.200" MID sleeves, then you can get a 471ci.
If you want to sleeve, you can run Darton LS7 sleeves (in the LS2 block) which will go out to a 4.190" bore. This coupled with a 4.250" stroke crank will net you a 469ci. That's about the max you can do until Darton finishes the 4.200" MID sleeves, then you can get a 471ci.
Originally Posted by Beast96Z
If you want to sleeve, you can run Darton LS7 sleeves (in the LS2 block) which will go out to a 4.190" bore. This coupled with a 4.250" stroke crank will net you a 469ci. That's about the max you can do until Darton finishes the 4.200" MID sleeves, then you can get a 471ci.
Also, who makes good cranks/rods/pistons to fit in a motor that big?
Thread Starter
TECH Resident
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From: strong island, NY
this helps out a little bit more...
https://ls1tech.com/forums/generation-iv-internal-engine/586580-4-1-4-125-stroke-possible-stock-ls2-block.html
But it still kinda doesnt answer my question. I am wanting to know more about a 402+, maybe 408, or 412.. nothing higher really... on a LS2
https://ls1tech.com/forums/generation-iv-internal-engine/586580-4-1-4-125-stroke-possible-stock-ls2-block.html
But it still kinda doesnt answer my question. I am wanting to know more about a 402+, maybe 408, or 412.. nothing higher really... on a LS2
Trending Topics
Here's what I sell for LS2's
Stroke x Bore
364ci Alum LS2 3.622 x 4.005
402ci Alum LS2 4.000 x 4.005
412ci Alum LS2 4.100 x 4.005
415ci Alum LS2 4.125 x 4.005
427ci Sleeved LS2 4.000 x 4.125
434ci Sleeved LS2 4.000 x 4.155
441ci Sleeved LS2 4.125 x 4.125
447ci Sleeved LS2 4.125 x 4.155
454ci Sleeved LS2 4.185 x 4.155
461ci Sleeved LS2 4.250 x 4.155
Stroke x Bore
364ci Alum LS2 3.622 x 4.005
402ci Alum LS2 4.000 x 4.005
412ci Alum LS2 4.100 x 4.005
415ci Alum LS2 4.125 x 4.005
427ci Sleeved LS2 4.000 x 4.125
434ci Sleeved LS2 4.000 x 4.155
441ci Sleeved LS2 4.125 x 4.125
447ci Sleeved LS2 4.125 x 4.155
454ci Sleeved LS2 4.185 x 4.155
461ci Sleeved LS2 4.250 x 4.155
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Sleeving cost You send me your clean used Ls2 block and I will sleeve it for $1,600 plus return shipping. Darton LS7 dry sleeves which I helped design, will go from 4.125" to 4.185" NA. If you intend to run a 300 shot, I would keep it to 4.150" to be safe.
Darton sleeves are much stronger than the original cast in sleeves or the pressed in gray iron liners in the stock LS7 (3X the tensile strength). Larger bore allows use of LS7 or other large valve heads. I do about as many LS7 resleeves as LS2.
Steve
Darton sleeves are much stronger than the original cast in sleeves or the pressed in gray iron liners in the stock LS7 (3X the tensile strength). Larger bore allows use of LS7 or other large valve heads. I do about as many LS7 resleeves as LS2.
Steve
Originally Posted by rookie89
What's the cost of sleeving the LS2 with LS7 sleeves? Also how safe would it be on motor, or with a 200-300 shot. I hear about heads lifting, but not sure if its boost/FI related. Also since the price of LS7 blocks is coming down, would it be any benefit to go with that instead of the LS2?
Also, who makes good cranks/rods/pistons to fit in a motor that big?
Also, who makes good cranks/rods/pistons to fit in a motor that big?
__________________
Steve Demirjian
Race Engine Development
Oceanside, Ca.
760-630-0450
web: www.raceenginedevelopment.com/
e-mail: race-engine-development@***.net
Steve Demirjian
Race Engine Development
Oceanside, Ca.
760-630-0450
web: www.raceenginedevelopment.com/
e-mail: race-engine-development@***.net
FormerVendor
Joined: Dec 2005
Posts: 250
Likes: 1
The one I think would be fun and I had in mind when we were developing our new 4.20 SD1 block is a stock crank, re-sleeved LS 1-7 block for a 4.200 bore that would make a 401". The quick rev potential would be there with the stock stroke and gaining the improved breathing of a large bore making you able to unshroud the valves. You could go 4.175-4.185 bore and get a 396"-398" and leave room to re-bore later. Most guys already have aftermarket rods and the stock crank is handleing tons of power, so just re-sleeving the block and new pistons would get you a 400 without the stroke.
FormerVendor
Joined: Dec 2005
Posts: 250
Likes: 1
That is where the factory cast iron sleeves are removed and larger, stronger sleeves are put in the block. That allows for larger bores, longer strokes (if the sleeve is longer than stock) and can handle more cylinder pressure than the factory cast iron liner. There are several options depending on your block and how you plan to use it.
