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
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
