Short block differences.
Thread Starter
Advanced
Joined: Apr 2011
Posts: 65
Likes: 1
From: hamilton waikato
Short block differences.
My 1990 coupe has developed a big end knock. So ive got to decide how to sort it. There is a rebuilt short block for sale locally but i have no idea if it's suitable. What should I look out for?
Cheers for any help on this one.
Cheers for any help on this one.
Pro
Joined: Aug 2009
Posts: 725
Likes: 4
From: Plano, TX
A crate motor from one of the local auto chains is always a good buy and comes with a warranty. The other alternative is to get a running one from a junkyard. If you buy a shortblock and change over all your accessories and heads/intake you will spend almost as much as crate motor once you pay for all the little things.
Safety Car
Joined: Aug 2009
Posts: 3,751
Likes: 276
From: Melbourne, Victoria, Australia
Hi
From my understanding there are two blocks for the early 80s to 90s.
The main difference being the 2 piece rear main seal up to late 1985, the later engines have the one piece rear main seal. The one piece seal assembly is bolted on the back of the engine, it is quite obvious.
That is the one you want.
There may be small differences but the transmissions bolt on to both engines and the engine mounts are the same.
From my understanding there are two blocks for the early 80s to 90s.
The main difference being the 2 piece rear main seal up to late 1985, the later engines have the one piece rear main seal. The one piece seal assembly is bolted on the back of the engine, it is quite obvious.
That is the one you want.
There may be small differences but the transmissions bolt on to both engines and the engine mounts are the same.
Team Owner
Joined: Aug 2005
Posts: 34,988
Likes: 515
From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
2016 C7 of Year Finalist
St. Jude Donor '09 thru '20
Le Mans Master
Joined: Oct 2008
Posts: 9,758
Likes: 49
From: Houston Texas
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
painless and predictable
Le Mans Master
Joined: Oct 2008
Posts: 9,758
Likes: 49
From: Houston Texas
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
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
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 412
From: WV
The zz4 is what I was going to put in my 89 until Pete K sold me on a 383 ..The problem with the ZZ4 is the 355 hp they have listed is with a carb, not fuel injection.By the time you put fuel injection and TPI on it your only looking at around 280 hp.. The motor also comes with the same heads the Corvette already has, so your spending money on something you have already . The cheapest route is to rebuild your old motor, or get a short block , freshen your heads and stick it back in..It all depends on if he wants more power or just a stock motor...WW
PS..I got my 383 built by Pete K, with dart pro 1 heads, custom cam, and all the other goodys for less then the zz4 is selling for, plus I have quite a bit more horsepower ...
PS..I got my 383 built by Pete K, with dart pro 1 heads, custom cam, and all the other goodys for less then the zz4 is selling for, plus I have quite a bit more horsepower ...
Last edited by WW7; Nov 13, 2011 at 02:31 PM.
Drifting
Joined: Mar 2009
Posts: 1,253
Likes: 4
From: East Wenatchee (2hours from n e where) WA
There are several builders on this board that know the L98 like the back of their hand.
as far as crates this is a good one, will take a little tuning and bigger induction. http://www.crateenginedepot.com/stor...72-P764C2.aspx
as far as crates this is a good one, will take a little tuning and bigger induction. http://www.crateenginedepot.com/stor...72-P764C2.aspx
Last edited by Crepitus; Nov 13, 2011 at 02:10 PM.
