How strong are the blocks?
How strong are the blocks? I was wondering how strong the 2 bolt main blocks are? I'm doing some research on building a motor and I need to know if THe block will handle.. say 700+ HP also i was wondering if you can make a 2bolt block to a 4 bolt?
Staging Lane
Joined: Mar 2006
Posts: 62
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the block has nothing to do with it. It is the mains on the crank. If you put the right fully forged assembly (crank, rods, pistons) with 4 bolt mains into a LT1 block there is no reason you can't handle over 800hp. The cast iron LT1 block is extremely strong.
The 2 bolt and 4 bolt blocks are the same casting it is a matter of machining. There are guys who have gone to that HP level sucessfully with the 2 bolt usually studding it rather than bolts. For that level though I would recommend splayed aftermarket caps be fitted, the cost is minor compared to what it will take to make that power or the consequences of having a failure which could easily wipe out the whole block, rotating assembly and even damage heads.
12 Second Club
Joined: Jun 2005
Posts: 1,119
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From: Chitown
Originally Posted by State69champ
So THe very best thing to do is find a lt1 vette block.... I read some where that is was only the 3 center mains that are 4 bolt.
Originally Posted by State69champ
So THe very best thing to do is find a lt1 vette block.... I read some where that is was only the 3 center mains that are 4 bolt.
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Here's what an LT1 looks like with 4 bolt splayed mains.... (this is my block with pro-gram engineering 4 bolt main caps).....
outside bolts go into the block at angles. You can 4 bolt the outside caps but it is pricey.... and kinda unneeded.... another thing you can do to strengthen the block is use block filler and do a half fill up to the bottom of the waterjackets. We're setting up mine this way and plan on taking it over the 1000hp mark....
outside bolts go into the block at angles. You can 4 bolt the outside caps but it is pricey.... and kinda unneeded.... another thing you can do to strengthen the block is use block filler and do a half fill up to the bottom of the waterjackets. We're setting up mine this way and plan on taking it over the 1000hp mark....
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George Baxter just had a 4-bolt main block had 1200 hp and was the world's fastest LT1 running Low 9's with his 383 with a Vortech.
My VRE 383, with AFR heads, and a D1SC is just a standard 2-bolt main.
My VRE 383, with AFR heads, and a D1SC is just a standard 2-bolt main.
Combination Motorsports Impala has gon 9.4 at 141mph on a run it list it's blower belt at the 1000ft mark, don't know what they have done to the mains but it is a boosted 383 LT1 with a BBC snout on the crank for the blower. The real kicker race weight of 4242lbs. If the fastest LT1 really is low 9s in a f-body then this without a doubt would have to be the most powerful.
They are using Trickflow heads because SOME people are begining to realize AFRs nowhere near live up to their reputation, others are stuck in the PAST when they were an upgrade over gen1 heads, but this aint a gen 1.
They are using Trickflow heads because SOME people are begining to realize AFRs nowhere near live up to their reputation, others are stuck in the PAST when they were an upgrade over gen1 heads, but this aint a gen 1.
Originally Posted by T/A KID
George Baxter just had a 4-bolt main block had 1200 hp and was the world's fastest LT1 running Low 9's with his 383 with a Vortech.
My VRE 383, with AFR heads, and a D1SC is just a standard 2-bolt main.
My VRE 383, with AFR heads, and a D1SC is just a standard 2-bolt main.
8.21@170MPH (385ci LT1 I think?)
Originally Posted by Renegade
Ok maybe I'm missing the point, but I'm pretty sure the World's Fastest LT1 belongs to https://www.horsepowerengineering.com/shop/
8.21@170MPH (385ci LT1 I think?)
8.21@170MPH (385ci LT1 I think?)
Hey he did say that George Baxter WAS. The block will take it Big Ricks is Grouted 398ci. LT1 put down 1500hp and it ran 8.08 @ 174mph at HRP last year during FFW test and tune.
