How Many Cubes from an LT1 Block?
Thread Starter
Safety Car
Joined: Jul 1999
Posts: 3,946
Likes: 63
From: Marianna FL
Re: How Many Cubes from an LT1 Block? (STL94LT1)
Who sells a 4" stroker crank for a SBC? What is involved in making that crank fit this block? Any clearance issues with the block or cam? Thanks for the info!
Team Owner
Joined: Mar 2001
Posts: 30,856
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From: Boston, Dallas, Detroit, SoCal, back to Boston MA
Re: How Many Cubes from an LT1 Block? (Mr Dave)
I've seen 424, lots of resin in the block, and that's after finding a block that passes a sonic check.
401 is fairly common. HotRod did an article a while back.
Forum member LT401 ( go figure ) runs it in his car Hoover, the car runs 10's naturally aspirated :eek:
http://phil.tobin.net/Hoover/top.html
He's dropping a big block in the car now.
[Modified by BrianCunningham, 12:49 AM 3/8/2004]
401 is fairly common. HotRod did an article a while back.
Forum member LT401 ( go figure ) runs it in his car Hoover, the car runs 10's naturally aspirated :eek:
http://phil.tobin.net/Hoover/top.html
He's dropping a big block in the car now.
[Modified by BrianCunningham, 12:49 AM 3/8/2004]
Pro
Joined: Dec 1999
Posts: 559
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From: Coppell TX
Re: How Many Cubes from an LT1 Block? (BrianCunningham)
396 is max reccomended, unless you just wanna sound cool when talking about your motor... and spend LOTS of money to do so. I ran a 401(10.8 @ 130mph NA) much like Phils. only reason it was 401 is cause i had to go .060 over to clean up my bores.
I have seen 427ci out of an LT1 block. get a real block if you wanna go big cubes (rocket/dart/etc)
I have seen 427ci out of an LT1 block. get a real block if you wanna go big cubes (rocket/dart/etc)
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Safety Car
Joined: Mar 2000
Posts: 3,581
Likes: 1
From: Springfield VA
Re: How Many Cubes from an LT1 Block? (JordonMusser)
I have seen 427ci out of an LT1 block. get a real block if you wanna go big cubes (rocket/dart/etc)
Melting Slicks
Joined: Sep 2000
Posts: 2,710
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From: Green Bay WI
Re: How Many Cubes from an LT1 Block? (JordonMusser)
396 is max reccomended, unless you just wanna sound cool when talking about your motor... and spend LOTS of money to do so. I ran a 401(10.8 @ 130mph NA) much like Phils. only reason it was 401 is cause i had to go .060 over to clean up my bores.
I have seen 427ci out of an LT1 block. get a real block if you wanna go big cubes (rocket/dart/etc)
I have seen 427ci out of an LT1 block. get a real block if you wanna go big cubes (rocket/dart/etc)
Race Director
Joined: Jan 2002
Posts: 12,263
Likes: 86
From: O'Fallon Missouri
Re: How Many Cubes from an LT1 Block? (96LT1)
Bill Mitchell puts together a 4.250" bore x 4.000" stroke combine to deliver 454 cubic inches on his Motown block. The Dart aluminum SBC can go up to 455 cubic inches with a 4.190" bore x 4.125" stroke. GM's Rocket block can also go up to a 455 with 4.190" bore x 4.125" stroke.
Unfortunately us LTx guys can't use these blocks.
Thread Starter
Safety Car
Joined: Jul 1999
Posts: 3,946
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From: Marianna FL
Re: How Many Cubes from an LT1 Block? (Mr Dave)
Who sells a 4" stroker crank for a SBC? What is involved in making that crank fit this block? Any clearance issues with the block or cam? Thanks for the info!
Drifting
Joined: Dec 2000
Posts: 1,255
Likes: 50
From: Clayton, NC north carolina
Re: How Many Cubes from an LT1 Block? (Mr Dave)
GTP was doing 420ci LT1's with a small circle cam. Dave, Even my 383 needed to be clearenced for my rod's. By the way Scott Shairoff is building 472ci street small block's(obviously not an LT1 engine) I just thought you guy's would get a kick out of how far you can take the smallblock.
Drifting
Joined: Feb 2002
Posts: 1,952
Likes: 2
From: Little Rock Arkansas
Re: How Many Cubes from an LT1 Block? (Mr Dave)
Much to my chagrin I'm in the middle of building a 415" LT1 for a friend's T/A... I, too, don't feel comfortable going over 396" or more than a 3.875" stroke; however I'm doing it anyway. The block is .060" over and still has over .250" on the thrust side of the walls (sonic test), I also did a short fill of HardBlok and cryoed the block so hopefully it will be okay... It will be a sub-6k rpm motor anyway. I'm using a 4.00" stroke crank with a two-piece rear main seal which necessitates a seal adapter. The block is pretty well done with Oliver billet caps and a lot of care in the machining; but it's still bigger than I'm comfortable with.
-Jeb
-Jeb
