I have no idea but I would imagine they will bring a premium. 
363ci Stroker kit for L33
Thread Starter
On The Tree
Joined: Feb 2019
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From: Texas
Thread Starter
On The Tree
Joined: Feb 2019
Posts: 171
Likes: 13
From: Texas
Basically what I and others have been trying to tell you is that a 4" stroke and a stock block are not ideal and that a 4" stroke crank with a smaller bore not a good combination when a larger bore and smaller stroke will accomplish the same thing and has the potential to be a much longer lasting combination. Even a higher compression stock stroke and bore is a better idea as long as it's not timing limited because of the fuel grade you intend to run.
If you look at the bigger picture it would be worth it to save a little longer and go with a larger stock bore aluminum piece. You can get a new LS2 block for $1600 shipped to your door, I'm not sure what condition your 5.3 is in now but if it's good running engine it should be worth a several hundred dollars making the new block much cheaper and it will probably need less prep at the machine shop than your current block so you'll save some there also.
If you look at the bigger picture it would be worth it to save a little longer and go with a larger stock bore aluminum piece. You can get a new LS2 block for $1600 shipped to your door, I'm not sure what condition your 5.3 is in now but if it's good running engine it should be worth a several hundred dollars making the new block much cheaper and it will probably need less prep at the machine shop than your current block so you'll save some there also.
Thompson Motorsports has a re sleeve deal for aluminum blocks 2000.00 sending the core in.
Up to 4.125" bore I believe. 388ci sounds Nasty
Big Hammer 388 -makes 670+ whp & 530+ wtq
L33s are neither Gen III or Gen IV. It's a gen IV block with Gen III components and gen III knock sensor bosses/valley and sensor holes - essentially a better and cheaper LS6 block.
TECH Senior Member
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From: Central Cal.
The L33 block has valley knock sensors and rear cam sensor. Set it on the ground next to an LS6 and you can't tell the difference until you measure the bore. That makes it a Gen III block. L33 is ALWAYS listed as a Gen III. Not trying to argue, just stating facts.
Thread Starter
On The Tree
Joined: Feb 2019
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From: Texas
I am on the edge of saying screw it and putting a 382ci stroker together. 3.898" boreWould that work or do I need to re evaluate again. Lmao
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I leave for a while to work. Come back. And this is the topic?
Find a 4" bore block. Any block. And build that. Unless you are going to turbo it. Then a 4.8 or 5.3 would be better. Otherwise, displacement is never a bad thing. And the cost of stroking and forging a 3.8" bore block is stupid, because it's the same as building a 454. The difference is the block cost. That's it.
Find a 4" bore block. Any block. And build that. Unless you are going to turbo it. Then a 4.8 or 5.3 would be better. Otherwise, displacement is never a bad thing. And the cost of stroking and forging a 3.8" bore block is stupid, because it's the same as building a 454. The difference is the block cost. That's it.
That's still not 4" bore is it?
A 3.9" bore anything is limited to about 600HP at the crank. Maybe you can get 620 out of it. Maybe.
While the 4" bore stuff can push into the 700s now. That's not like a 20HP difference given that it's just a 20cid displacement difference...
A 3.9" bore anything is limited to about 600HP at the crank. Maybe you can get 620 out of it. Maybe.
While the 4" bore stuff can push into the 700s now. That's not like a 20HP difference given that it's just a 20cid displacement difference...
TECH Senior Member
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From: Central Cal.
The motor in my race car was an L33 core before we bored it.
Thread Starter
On The Tree
Joined: Feb 2019
Posts: 171
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From: Texas
I cant afford a LS2 block plus a stroker kit. So what now? I have $5k no more and no less to get this whole car back running. I have more to fix than just the engine as well. Torque tube needs a rebuild kit,Half shafts,Motor and engine mounts,Fuel lines,Tires, Bumper, radiator support. Etc
ls2 block/shortblock deals are out there. i just picked one up (Shortblock) for $600. iron is even cheaper. ls2 conversion is going co cost you $500-800ish in other parts depending on your parts list, however. new valley cover, front cover, sensors, harness/pcm adapters, etc - assuming you can find an 05 ls2 that is already 24x.
Thread Starter
On The Tree
Joined: Feb 2019
Posts: 171
Likes: 13
From: Texas
ls2 block/shortblock deals are out there. i just picked one up (Shortblock) for $600. iron is even cheaper. ls2 conversion is going co cost you $500-800ish in other parts depending on your parts list, however. new valley cover, front cover, sensors, harness/pcm adapters, etc - assuming you can find an 05 ls2 that is already 24x.
TECH Senior Member
Joined: Jun 2016
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From: Central Cal.
Yeah that seems like alot of extra crap to deal with for 20 more cubes. Most likely the car will have problems spinning with a 382ci ......add 20 more cubes and it will get even worst. Not to mention I cant afford to buy a set of 2000.00 dollar axle shafts to handle it. I dont want to be breaking parts all the time.
BUT if that's no longer a concern, just build a nice stout 5.3 out of that L33. A nice 5.3 is good for 400+ HP with a decent mild cam. The stock stroke will let it rev nicely. Put an LS2 or late truck manifold on it (if room allows..), a late truck 87mm TB, and a decent exhaust. You've already got the 243 heads. You can have a lot of fun with such an engine.
I asked TSP about the specific short block being mentioned in this thread looking for a forged short block on a budget. For the money I wanted to spend on a short block while being good for boost they immediately recommended a forged LS2 short block or an iron 370. Kind of supports what everyone here is recommending...