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Weights of LS Blocks

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Old 04-01-2013, 03:38 PM
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LT1Altered: If you're still interested in the weight of the carb'd LS intake manifold, I've got an Edelbrock Performer RPM manifold I can weigh for you tonight.
Old 04-01-2013, 04:16 PM
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Originally Posted by kacivic
LT1Altered: If you're still interested in the weight of the carb'd LS intake manifold, I've got an Edelbrock Performer RPM manifold I can weigh for you tonight.
That would be great.
I also have more data from some other parts I've weighed so I can update the chart.

Since converting my car from carbureted LT1 to EFI LS1 I lost a total of 45 pounds.
Old 04-04-2013, 06:36 PM
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My shipping scale reads 15 lb 2.4 oz for the bare ls1 Edelbrock performer manifold.
Old 07-29-2013, 05:49 AM
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Originally Posted by bww3588
Tubular k member and some weight reduction on the front end will easily make up that 110 lbs.
The logic here is flawed. You can have those same weight reduction mods with a lighter block. So it is still costing you 110lbs.
Old 07-30-2013, 09:02 AM
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Originally Posted by JohnFrazee02SS
good info but a 5.3/4.8 block?
Anyone?
Old 08-22-2013, 05:03 PM
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any one ever took the weight of a ls1 with darton sleeves
Old 08-24-2013, 07:58 AM
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Having a 408 iron block built now LQ9; will just boost my way past the extra weight. Going to 15 lbs first.
Old 08-25-2013, 09:29 PM
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Sometime a little weight is worth it~
Old 08-26-2013, 09:19 AM
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Don't know how I've never seen this thread but it's a nice wake up call for all the people on tech who keep spouting off the weight difference is LESS than 80lbs between ls1 and lq4/lq9. It's actually a bit more.
Old 08-27-2013, 09:59 AM
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Interesting.....
Old 09-18-2013, 11:04 PM
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The hard part to swallow about this weight is its front end, where weightloss is most important, if it was in the rear I wouldn't mind a bit but looking into future strokers this makes an LS2/3 worth the money maybe. I don't want my 60' taking a **** at the already less than impressive track prep my local track has.
Old 10-24-2013, 04:14 PM
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its hard for me to think that the iron LS block is about the same weight as a BBF block.
Old 02-23-2014, 08:46 AM
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Thanks good info
Old 05-26-2014, 10:00 PM
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So does anybody have an accurate weight for a 6.0 iron block alum head motor complete less power steering and ac compressor? I'd like to know just busted a alum block cracked around the motor mount bolts but it las test 5 years! Thinkn about going to steel block for durability and better ring seal and hopefully not to crack it around motor mount bolts!
Old 08-18-2014, 12:48 PM
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Why not just run a engine plate and keep using the alum block
Old 09-13-2014, 05:40 PM
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Originally Posted by Mighty Whitey

Iron 6.0, $150
Ls2 block, $500
Try dropping 110lbs for $350!

Where are you getting blocks that cheap. I just gave $350 to have a crack welded and sleeve put in an LS1. Cheapest I can find an iron 6.0 is $1200 complete, $700 long block with iron heads and LS2 is $1200 bare.

I'll give $800 for a bare LS2 right now. Who wants my money?

Last edited by ericwilloughby; 09-23-2014 at 12:24 PM.
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Old 01-29-2015, 01:33 PM
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Default Lsa

Curious what the weight of a LSA block is. Can we add that to the list?
Old 03-07-2015, 12:07 PM
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Originally Posted by 99427camaro
any one ever took the weight of a ls1 with darton sleeves
I want to know myself. Old post but bump.....
Old 04-11-2015, 12:02 PM
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Weight on the front end can be reduced to help compensate for the added weight of the iron block. Putting the battery to the back can save around 40 lbs and help with traction. Changing out some front end parts can save you another 10 - 20 lbs. I'm putting a Dart LS iron next block in my C5, the block weighs 227 lbs. and can handle high boost. The oiling system has been redesigned to give you better oiling than the LS1 blocks. Personally the oiling system and added strength sold me on the Dart block.
Old 04-19-2015, 12:53 AM
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Originally Posted by 99427camaro
any one ever took the weight of a ls1 with darton sleeves
I finally got the scoop!! A 5.3 aluminum block with Darton sleeves weigh 105 lbs. The block is setup for 4.125 bore or bigger!!


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