402 short blocks for under $3500.
Thread Starter
Race Director
Joined: Dec 1999
Posts: 13,459
Likes: 1
From: Westport, MA. www.tbyrnemotorsports.com - 1-877-4-TBYRNE
St. Jude Donor '06-'07
402 short blocks for under $3500.
SLP will soon have very affordable 402 short blocks ready to ship with no core required!
Crate-Engine-Assembly, "ZL-402" LS1 Short Block (High Compression)
With GM’s versatile "Gen III" small-block gaining popularity as the foundation for a wide range of high-performance engine build-ups, market demand for an affordable LS1 stroker package has become increasingly intense. In response, SLP Performance Parts has devised a revolutionary new Gen III stroker short-block assembly, one that offers unexcelled performance and durability at a truly accessible price.
Dubbed the "ZL-402" to reflect its beastly 402-cubic-inch displacement, the package is chockablock with such race-proven hardware as a new GM LQ9 block, a 4.00" forged steel crank, and 4.00" forged aluminum pistons. With the right cam and heads and a properly tuned PCM, the ZL-402 is fully capable of producing over 575 hp and a similar amount of torque in naturally aspirated form.
This package is sold only in short-block form, minus manifolds, camshaft, oil pump, and other ancillary equipment. The obvious advantage of this approach is that it allows each customer to formulate a parts combination that is perfectly suited to his or her needs. (For those who prefer "one-stop shopping," SLP offers a host of uninstalled options on an à la carte basis.)
Although designed primarily for use in late-model F-Bodies and Corvettes, the ZL-402 also makes a superlative choice for most street-rod, muscle-car, and truck applications. Best of all, it’s sold outright, eliminating the shipping hassles, protracted vehicle downtime, and additional out-of-pocket expenses associated with core returns.
Features
Built entirely from brand-new parts.
Sold outright*no cores required!
GM LQ9 iron 6.0-liter block (includes block plugs)
4.000" 4340 forged steel crankshaft, balanced to rotating assembly
4.000" 2618 forged alloy pistons (includes new rings and full-float pins)
402-CID displacement
6.125" I-beam rods
Includes new, factory-installed cam, rod, and main bearings.
11.3:1 compression ratio (nominal; ultimate compression ratio will depend upon heads and gaskets used)
Designed for naturally aspirated applications
Meticulously assembled to OEM tolerances and specifications.
Oil pump, timing chain, camshaft, pans, plates, and covers not included.
Looking for less compression? There will also be a 9:1 version available!
More details for each of these can be found on our website. We're currently taking pre-orders to provide you with one of the first that become available. They are expected to start shipping around September 1st! Our price is $3499.99 for each with NO core exchange required!
Last edited by tbyrne; Aug 6, 2004 at 09:29 PM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Melting Slicks
Joined: Feb 2003
Posts: 2,966
Likes: 22
From: Frederick Maryland
St. Jude Donor '08-'09-'10-'11
Originally Posted by kromberg
I really do not like the idea of the motor being externall balanced 
Makes upgrades to clutches and crank pullies impossible.
Keith
Makes upgrades to clutches and crank pullies impossible.Keith
Le Mans Master
Joined: Jan 2001
Posts: 5,786
Likes: 6
From: Lafayette Colorado
Originally Posted by ragtopws6
Where did you get this information? All the LSX series engines are internally balanced. You know something the rest of us don't know?
Keith
Melting Slicks
Joined: Feb 2003
Posts: 2,966
Likes: 22
From: Frederick Maryland
St. Jude Donor '08-'09-'10-'11
Originally Posted by kromberg
I know that 'normal' LSx based motors are internally balanced. If one checks the SLP website, you will see that these motors are externally balanced.
Keith
Keith
Thread Starter
Race Director
Joined: Dec 1999
Posts: 13,459
Likes: 1
From: Westport, MA. www.tbyrnemotorsports.com - 1-877-4-TBYRNE
St. Jude Donor '06-'07
Here are some more details -
Production 6.0 block
Internally balanced rotating assembly
SLP sped'd Eagle 4" crankshaft
SLP spec'd 4" pistons, 2618 forging (Ross or Manley). N/A version - approx - 1.2:1. Heavy duty forced induction version approx 9:1. Compression ratios are nominal, ultimate compression ratio wil depend on the heads and gaskets that are used.
Assembly is meticulously assembled to OEM tolerances and specifications.
Oil pump, timing chain, camshaft, pans, plates and covers not included.
Production 6.0 block
Internally balanced rotating assembly
SLP sped'd Eagle 4" crankshaft
SLP spec'd 4" pistons, 2618 forging (Ross or Manley). N/A version - approx - 1.2:1. Heavy duty forced induction version approx 9:1. Compression ratios are nominal, ultimate compression ratio wil depend on the heads and gaskets that are used.
Assembly is meticulously assembled to OEM tolerances and specifications.
Oil pump, timing chain, camshaft, pans, plates and covers not included.
