1.8 ratio rockers
Thread Starter
Melting Slicks
Joined: Mar 2005
Posts: 3,222
Likes: 0
From: Mayfield kentucky
1.8 ratio rockers
I have a 222/224 566/568 12 cam in my 97 would I gain anything by replacing my stock rockers to 1.8 rockers. Would I get more of a thump out of the cam and would it mess up my tuning that LG did for me. Any more Hp out of it. 
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Check the Cranes, they appear to be the better of the bunch. I am going the opposite as you, I plan on the Crane 1.8's and springs followed by a cam later. I won't go as high on lift as where you are going to end up though.
Safety Car
Joined: May 2003
Posts: 3,814
Likes: 105
From: Dearborn Heights Michigan
I run a similar cam with Jesel 1.8"s and .588 lift. Had to grind a bit of clearance in the rocker covers. As previous post, better change the valve springs and titanium keepers.Also high strength push rods.
Fred
Fred
Le Mans Master
Joined: Jun 2004
Posts: 7,155
Likes: 154
From: The Arid Sunny Desert
If dyno numbers are all you are looking for then I'm not so sure that it would make a difference. See this post.http://forums.corvetteforum.com/show...642&forum_id=1
Drifting
Joined: Nov 2001
Posts: 1,791
Likes: 0
From: NE PA
I have a lot of experience with higher ratio rockers. First I installed a set of SLP 1.85's on my motor and later replaced them with a set of the Crane 1.80 Quick-Lift roller rockers. The SLP rockers were a bit of a disappointment though I did pick up ~15 rwhp with them. However, when I replace them with the Crane 1.80's (actually 1.82) I picked up another 10 rwhp and 8 rwtq over and above what I'd gained with the SLP versions. Also, peak numbers don't tell you the whole story. I picked up gains across the entire power band with the Cranes and now have more power under the curve than ever before. 
Melting Slicks
Joined: Jul 2004
Posts: 3,092
Likes: 120
From: orlando florida
St. Jude Donor '15
Originally Posted by vettes4fun
I have a 222/224 566/568 12 cam in my 97 would I gain anything by replacing my stock rockers to 1.8 rockers. Would I get more of a thump out of the cam and would it mess up my tuning that LG did for me. Any more Hp out of it.
Heel & Toe
Joined: Aug 2005
Posts: 23
Likes: 0
Originally Posted by vettes4fun
I have a 222/224 566/568 12 cam in my 97 would I gain anything by replacing my stock rockers to 1.8 rockers. Would I get more of a thump out of the cam and would it mess up my tuning that LG did for me. Any more Hp out of it.
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
Drifting
Joined: May 2003
Posts: 1,715
Likes: 1
From: cAshburn VA
As stated above this is going to put you at a total lift of just over .600, which means some decent dual valve springs. I highly suggest the CompCam 921's. From all reports, you should not have to modify your valve covers with the Crane's, they are a good choice.
Not an expert, just my $.02.... Good Luck!
Not an expert, just my $.02.... Good Luck!
Burning Brakes
Joined: Nov 2004
Posts: 988
Likes: 4
From: Livermore CA
I did the Crane 1.8s with Crane Duals and feel a definate increase in pull under peak, have not dynoed it. It fattened up the middle rpm pulling torque of my Z which is what I was looking for. No codes, very slight increase in sewing machine noise at idle, fair amount of increase in exhaust tone which is cool.
Drifting
Joined: Jul 2005
Posts: 1,315
Likes: 50
From: East Strouds PA
I run 1.8's just be sure to change the springs use titanium retainers.and dont forget pushrods.Vinci high performance in Florida has an overstock of these kits so you'll probably get a good deal from Roger over there.he also has strong ties to Crane.I picked up near 20hp 20tq with a magcharged z06.I wonder how much valve clearence you have with that cam you run though.I run a stock z06 cam and my pistons have valve reliefs.Lastly,I have about 40,000 miles on the Cranes
