Splayed main caps
Thread Starter
Drifting
Joined: Jun 2001
Posts: 1,625
Likes: 1
From: Zagreb, Croatia
Splayed main caps
I'm a little bit confused on what splayed main caps should I get.
I have '90 Corvette L-98 1 piece RMS 2-bolt block and I'd like
to get splayed main caps for it.
I've checked e-bay and there are a few options from cheap to
not so cheap.
But what confuses me is that there are two versions of ProGram
main caps, flat or step bottom.
It is stated that flat caps are for 2 or 4-bolt blocks and stepped caps
are for 4-bolt blocks.
But my 2-bolt block is stepped.
Did any of you did this conversion and what kind of caps did you use?
I have '90 Corvette L-98 1 piece RMS 2-bolt block and I'd like
to get splayed main caps for it.
I've checked e-bay and there are a few options from cheap to
not so cheap.
But what confuses me is that there are two versions of ProGram
main caps, flat or step bottom.
It is stated that flat caps are for 2 or 4-bolt blocks and stepped caps
are for 4-bolt blocks.
But my 2-bolt block is stepped.
Did any of you did this conversion and what kind of caps did you use?
Melting Slicks
Joined: Jul 2003
Posts: 2,284
Likes: 4
From: Canton MI
putting caps on a block cost alot of money, you have to line bore, line hone + the machining to make the caps fit and the new bolts and studs. can i ask what kind of power you plan on making ? a 2 bolt with studs can take bunch of power …. I personally had one that went 9s and few of my friends have bunch of 10s motors on 2 bolt . the way I see it with the money your going to spend on a stock block to convert it to 4 bolt splayed, you can find a used aftermarket block and never look back … 
Safety Car
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
putting caps on a block cost alot of money, you have to line bore, line hone + the machining to make the caps fit and the new bolts and studs. can i ask what kind of power you plan on making ? a 2 bolt with studs can take bunch of power …. I personally had one that went 9s and few of my friends have bunch of 10s motors on 2 bolt . the way I see it with the money your going to spend on a stock block to convert it to 4 bolt splayed, you can find a used aftermarket block and never look back …
Don't waste your money .Turbo car ok ,anything else it's not needed.
Thread Starter
Drifting
Joined: Jun 2001
Posts: 1,625
Likes: 1
From: Zagreb, Croatia
putting caps on a block cost alot of money, you have to line bore, line hone + the machining to make the caps fit and the new bolts and studs. can i ask what kind of power you plan on making ? a 2 bolt with studs can take bunch of power …. I personally had one that went 9s and few of my friends have bunch of 10s motors on 2 bolt . the way I see it with the money your going to spend on a stock block to convert it to 4 bolt splayed, you can find a used aftermarket block and never look back …
But I want engine that could take supercharger if I'll decide to
use one later.
Problem is my location. If I lived in US I wouldn't think twice before getting aftermarket block,
but with shipping costs I have to work with what I can find here.
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
