Question about 243 heads
Thread Starter
Racer
Joined: Oct 2020
Posts: 305
Likes: 65
From: Huntington, NY
Question about 243 heads
I’m going to have a set of 243 Cathedral Port heads off a C5 Z06 CNC Ported, bowls blended, etc.
When I replaced the stock yellow springs and installed a CHE Trunion Kit I was pretty shocked at how crude and rough the stock cast rocker arm stand is. It’s so far from a percision piece that I find it hard to believe that the topic of throwing it out right away isn’t discussed much.
Am I missing something? It seems like absolute junk to me.
Can someone enlighten me on this?
Erik
When I replaced the stock yellow springs and installed a CHE Trunion Kit I was pretty shocked at how crude and rough the stock cast rocker arm stand is. It’s so far from a percision piece that I find it hard to believe that the topic of throwing it out right away isn’t discussed much.
Am I missing something? It seems like absolute junk to me.
Can someone enlighten me on this?
Erik
Thread Starter
Racer
Joined: Oct 2020
Posts: 305
Likes: 65
From: Huntington, NY
You are correct and that to me is the strange part. Have you ever held that piece in your hand? It’s incredibly crude in its casting and ready to use state for such an important role in the valve train.
I guess I’m overreacting. Just seems like the machining should be much better. However I will never ever be even close to as smart as the group that designed it.
Maybe I should just go to bed….
Safety Car
Joined: Mar 2017
Posts: 3,768
Likes: 940
From: Orlando Florida
If they worry you, Livernois has you covered with CNC machined billet. Not free, duh, but for what they are not overpriced either:
https://www.livernoismotorsports.com...stock-hardware
https://www.livernoismotorsports.com...stock-hardware
Tech Contributor
Joined: Jan 2007
Posts: 19,422
Likes: 1,146
From: Dyer, IN
I’m going to have a set of 243 Cathedral Port heads off a C5 Z06 CNC Ported, bowls blended, etc.
When I replaced the stock yellow springs and installed a CHE Trunion Kit I was pretty shocked at how crude and rough the stock cast rocker arm stand is. It’s so far from a percision piece that I find it hard to believe that the topic of throwing it out right away isn’t discussed much.
Am I missing something? It seems like absolute junk to me.
Can someone enlighten me on this?
Erik
When I replaced the stock yellow springs and installed a CHE Trunion Kit I was pretty shocked at how crude and rough the stock cast rocker arm stand is. It’s so far from a percision piece that I find it hard to believe that the topic of throwing it out right away isn’t discussed much.
Am I missing something? It seems like absolute junk to me.
Can someone enlighten me on this?
Erik
Safety Car
Joined: Aug 2011
Posts: 4,447
Likes: 409
From: Portland OR
The pedestals are machined as are the bottoms. I’m failing to see how the rest matters?
If I had any complaint it would be the depth of pedestals. Just have to be sure the rocker tip is straight over the valve when you tighten things down.
If I had any complaint it would be the depth of pedestals. Just have to be sure the rocker tip is straight over the valve when you tighten things down.
Tech Contributor
Joined: Jan 2007
Posts: 19,422
Likes: 1,146
From: Dyer, IN
It's just a gross misunderstanding on the OP's part of why parts are cast, and then receive a secondary operation for critical surfaces.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
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