Are they all the same?
Thread Starter
Racer
Joined: Feb 2005
Posts: 338
Likes: 49
From: Quincy,Illinois
Are they all the same?
Are L98 blocks the same as any other gen1 350 blocks?
I have heard that the iron in the vette blocks is a different alloy than a standard 350 block.
Also are all 87 and newer blocks made for roller cams even if they didn't come with one?
Was wondering if I need to stay with my vette block or if I can use a junkyard piece for a rebuild and have the same thing.
I have heard that the iron in the vette blocks is a different alloy than a standard 350 block.
Also are all 87 and newer blocks made for roller cams even if they didn't come with one?
Was wondering if I need to stay with my vette block or if I can use a junkyard piece for a rebuild and have the same thing.
Le Mans Master
Joined: Mar 2000
Posts: 8,950
Likes: 4
From: Lafayette LA
If you are going to go that route, get a vortec block from a 96-98 C/K Truck / 96-99 GM SUV / 96-02 GM Van.
Safety Car
Joined: Jan 2004
Posts: 3,556
Likes: 13
1 pce seal blocks are machined for the roller hardware whether roller cam was fitted or not
Many truck blocks are 4 bolt mains
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
Thread Starter
Racer
Joined: Feb 2005
Posts: 338
Likes: 49
From: Quincy,Illinois
If you are going to go that route, get a vortec block from a 96-98 C/K Truck / 96-99 GM SUV / 96-02 GM Van.[/QUOTE]
Are these blocks 4 bolt? maybe a forged crank or a cast nodular like the l98?
Are these blocks 4 bolt? maybe a forged crank or a cast nodular like the l98?
Drifting
Joined: Aug 2006
Posts: 1,624
Likes: 2
From: Canandaigua New York
Originally Posted by IBVETN2
Are these blocks 4 bolt? maybe a forged crank or a cast nodular like the l98?
A lot of the truck and van engines are 4 bolt but that wouldn't make any difference since your corvette engine isn't.
All L98's are 2 bolt main.
Last edited by Keystring; Sep 26, 2010 at 06:22 PM.
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 412
From: WV
WW
Last edited by WW7; Sep 26, 2010 at 06:45 PM.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Last edited by rodj; Sep 26, 2010 at 08:47 PM.
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
I considered that an upgrade from the factory 2-bolt block. Both blocks are 638 blocks with the same alloy.
Thread Starter
Racer
Joined: Feb 2005
Posts: 338
Likes: 49
From: Quincy,Illinois
Thread Starter
Racer
Joined: Feb 2005
Posts: 338
Likes: 49
From: Quincy,Illinois
is the 638 the last 3 digits of the casting number? Is there a different casting number for the 4 bolt blocks so you don't have to pull the pan to look?
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
638 is same block casting on my '93 truck block and my '89 L98 .Both 2 bolt . You will find it listed as a early 1 pce seal block ('86 - '94 )
Vortec L31 4 bolt block for my 383 is 880 ; same as used for ZZ4 Crate engine ('96 -'00 )
Vortec L31 4 bolt block for my 383 is 880 ; same as used for ZZ4 Crate engine ('96 -'00 )
Last edited by rodj; Sep 27, 2010 at 12:08 AM.
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
638 is just what's stamped on the block for 4-bolts and 2-bolt 1-pc RMS. As such, I'd think their metal content would be identical. That's the only reason I mentioned it (referring back to the OP question about alloy).
Thread Starter
Racer
Joined: Feb 2005
Posts: 338
Likes: 49
From: Quincy,Illinois
Does the L31 Vortec either 2 0r 4 bolt mains have powdered metal rods? Not sure what a powdered metal rod is. Are they better than the X rods that are in the L98?
Does the L31 have a better crank than an L98?
Does the L31 have a better crank than an L98?