Sewing machine sound
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Sewing machine sound
Well I did a H/C change. Cam is a 224/224 .567/.567 lift on a LSA114.
I had/have the sewing machine noise. I installed the Caddy Race Lifters and still have the noise. I'm using 7.400 push rods. A frined told me to change to 7.425 push rods to meet the pre-load of the lifters and this will quieten the sewing machine sound some.
I heard a lot about the Caddy Racing Lifter help with the sewing machine sound, but it hasn't worked for me so far.
Any other sugesstions out there?
Thanks...
Sleeper
I had/have the sewing machine noise. I installed the Caddy Race Lifters and still have the noise. I'm using 7.400 push rods. A frined told me to change to 7.425 push rods to meet the pre-load of the lifters and this will quieten the sewing machine sound some.
I heard a lot about the Caddy Racing Lifter help with the sewing machine sound, but it hasn't worked for me so far.
Any other sugesstions out there?
Thanks...
Sleeper
Drifting
Joined: Jan 2007
Posts: 1,865
Likes: 27
From: WTB Kook 2" long tube 4 C5 TEXAS
dam that sucks! Im planning on getting the caddy lifters as well because I heard the same thing about them helping with the sewing noise. What did you pay for them, if you dont mind me asking?
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Thanks,
Sleeper
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Check with Cobra4B. He did the YellaTerra's and I'm not sure how much they quieted things. A few have commented that they help. I am running the Crane's and mine is quiet, but then again I think I may have a slower ramp on my cam then you have and that may be a contributor to the lack of sewing machine noise on my car. I have also been reading good things on the Scorpion rockers, but don't know much about them personally. They are supposed to be light and have an excellent wipe pattern, from what I have read the best wipe pattern of any fixed fulcrum rocker (Cranes are adjustable so the wipe pattern can be optimized).
Pro
Joined: May 2004
Posts: 551
Likes: 19
From: Morgantown WV
The sewing machine sound is the sound of the valves closing against the seats. If you have dual valve springs then there is your reason. I have been considering going with behives to see how much of a difference they make. I have a fairly mild cam so I'm not too concerned about losing the security of dual springs.
I would sure like to hear from anyone who perhaps has already done this.
I would sure like to hear from anyone who perhaps has already done this.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Check with Cobra4B. He did the YellaTerra's and I'm not sure how much they quieted things. A few have commented that they help. I am running the Crane's and mine is quiet, but then again I think I may have a slower ramp on my cam then you have and that may be a contributor to the lack of sewing machine noise on my car. I have also been reading good things on the Scorpion rockers, but don't know much about them personally. They are supposed to be light and have an excellent wipe pattern, from what I have read the best wipe pattern of any fixed fulcrum rocker (Cranes are adjustable so the wipe pattern can be optimized).
I seen the ones in Summit racing ...Harland Sharp brand. They come 1.7 or 1.8. I'll look up the info you gave..
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
Melting Slicks
Joined: May 2005
Posts: 3,394
Likes: 12
From: Leon Iowa
St. Jude Donor '06-'07-'08-'09
Hey Deno, I know how to fix it, do what I did and get loud exhaust
Just kidding but the longer pushrods will help but not get rid of it completely. I tried everything including changing the cam and lifters if you remember. Still makes noise.
Just kidding but the longer pushrods will help but not get rid of it completely. I tried everything including changing the cam and lifters if you remember. Still makes noise.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Melting Slicks
Joined: May 2005
Posts: 3,394
Likes: 12
From: Leon Iowa
St. Jude Donor '06-'07-'08-'09
yea but i honestly think it has to do with the ramp rate of these cams. I really think that alot of the noise is from the valves getting slammed open and shut
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Team Owner
Joined: Mar 2001
Posts: 25,889
Likes: 7
From: Virginia Beach
CI 3-5-6-7-8 Veteran
^ I have yella terras... they're the newer lightened design. They work great. There is valvetrain noise when the oil is hot, but nothing worse than stock when hot. Click the link in my sig for an idle video. I don't run fuel rail covers and I have a vented hood so that actually increases the noise.
Here's some pics:
Here's some pics:
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody