L33 to ls1
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L33 to ls1 So I've been doing some research and saw that it might be possible to take the L33 aluminum block 5.3 to a ls1 bore and run it as a 347. Is this true? Is there any special rods I'll have to run if it is true. The trucks got some pretty mean piston slap so I'll have to do something. Anyone that has done this would be great, I'd like to know how it's running, or any other info would be great. Thanks
On The Tree
Joined: Sep 2009
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I got a rebuilt motor from a vendor here. The block is a L33 block. It's running at 347 cid. Runs the same if not better than my original LS1. I did put different heads on it and a different cam, but everything else bolted right over.
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Thread Starter
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Joined: Mar 2015
Posts: 19
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Do you know how much hp your making? I'll be doing head and cam work too
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Verdad Gallardo On The Tree
Joined: Sep 2009
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I got the Thompson Motorsports 5.7 stock rebuild. It's what I could afford and it's only my daily. I have 317 heads, LS6 cam, stock intake, and stock manifolds. The compression is lower because I didn't mill the heads. I haven't done any dyno testing on it, but it's making more power than the stock motor did. I may do heads and a different cam later, but it's not in my plans just yet.
On a side note, I did have an issue with head bolts. I wound up using ARP bolts that are the same length for the large bolts. The rebuild kit i got came with the two different length large bolts. Make sure you know what set you need before getting stuck when you try bolting the heads on.
On a side note, I did have an issue with head bolts. I wound up using ARP bolts that are the same length for the large bolts. The rebuild kit i got came with the two different length large bolts. Make sure you know what set you need before getting stuck when you try bolting the heads on.
TECH Addict
Joined: Aug 2005
Posts: 2,305
Likes: 126
From: Monroe,NY
5.3/5.7 Short Block consist of these items:
Blueprinted GM block L33 core
King racing main bearings
King Racing rod bearing
Thompson Motorsports single piece racing cam bearings
GM Nodular crankshaft turned core
GM connecting rods TMS remanufactured cores
TMS Hypereutectic piston set 3.800/3.898"
TMS Moly rings
From Thompsons website
Blueprinted GM block L33 core
King racing main bearings
King Racing rod bearing
Thompson Motorsports single piece racing cam bearings
GM Nodular crankshaft turned core
GM connecting rods TMS remanufactured cores
TMS Hypereutectic piston set 3.800/3.898"
TMS Moly rings
From Thompsons website
Thread Starter
Registered User
Joined: Mar 2015
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I got the Thompson Motorsports 5.7 stock rebuild. It's what I could afford and it's only my daily. I have 317 heads, LS6 cam, stock intake, and stock manifolds. The compression is lower because I didn't mill the heads. I haven't done any dyno testing on it, but it's making more power than the stock motor did. I may do heads and a different cam later, but it's not in my plans just yet.
On a side note, I did have an issue with head bolts. I wound up using ARP bolts that are the same length for the large bolts. The rebuild kit i got came with the two different length large bolts. Make sure you know what set you need before getting stuck when you try bolting the heads on.
On a side note, I did have an issue with head bolts. I wound up using ARP bolts that are the same length for the large bolts. The rebuild kit i got came with the two different length large bolts. Make sure you know what set you need before getting stuck when you try bolting the heads on.
On The Tree
Joined: Sep 2009
Posts: 179
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No problems in the first couple thousand miles. I have to replace my radiator as mine cracked yesterday, but I don't consider that due to the engine. For all people put down the LS6 cam, I kinda like it. I don't need much more as it's my daily, but I always want more. I'm stuck in California and I gotta deal with smog crap, so I gotta be kinda easy on this one. I guess that means I'm "stuck" with AFR heads, FAST intake, and a small"ish" cam. No crazy hp daily driver numbers for me.