***Cam size***
Supporting Tuner
Joined: Sep 2004
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From: ================== Houston, Texas www.englandgreen.com ================== Necessary Evil™ __________
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St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
"AlohaC5" Senior Member
Joined: Jun 2003
Posts: 3,562
Likes: 44
From: Madison, AL
What are your goals. That's a really small cam. If there's one thing I learned - when in doubt go one bigger. I've gone through 5 cams. Need to ask yourself what type of driving do you plan to do, e.g., mild/stock-like, drag racing, road course tracks, do you want the torque down low, mid range or up high, etc. Stock heads or aftermarket. Many variables.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
I have a 224/224 .567/.567 LSA114 cam and I hate the sewing machine sound...I have installed, caddy lifters, 7.425 push rods, Harland Sharp roller rockers and nothing has helped with the sound.
I was wondering if the smaller cam with a smaller lift would not give it as loud a sewing machine sound.
With the cam in the engine now I wanted to reach 400RWHP.
I don't plan to race the car, it's a DD just wanted 400 RWHP on the street.
Thanks,
Sleeper
I was wondering if the smaller cam with a smaller lift would not give it as loud a sewing machine sound.
With the cam in the engine now I wanted to reach 400RWHP.
I don't plan to race the car, it's a DD just wanted 400 RWHP on the street.
Thanks,
Sleeper
Burning Brakes
Joined: Jul 2005
Posts: 788
Likes: 33
From: Cedar Rapids IA
GM went from .500 lift stock cam to .550 lift Z06 cam without the noise. I'd like to see a dyno graph where the Z06 cam is optimized. i.e. DCR = 8.7 for 93 octane, AFR heads, AR header, ported FAST90/90, possibly injectors,
UD pulley, EWP, roller rockers, tune. Should make 400 rwhp with all the goodies. With the exception of the EWP, should be good for daily driver.
UD pulley, EWP, roller rockers, tune. Should make 400 rwhp with all the goodies. With the exception of the EWP, should be good for daily driver.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
GM went from .500 lift stock cam to .550 lift Z06 cam without the noise. I'd like to see a dyno graph where the Z06 cam is optimized. i.e. DCR = 8.7 for 93 octane, AFR heads, AR header, ported FAST90/90, possibly injectors,
UD pulley, EWP, roller rockers, tune. Should make 400 rwhp with all the goodies. With the exception of the EWP, should be good for daily driver.
UD pulley, EWP, roller rockers, tune. Should make 400 rwhp with all the goodies. With the exception of the EWP, should be good for daily driver.
A member said the noiser valvetrain noise comes in with a cam above550. So this may be true.
I have all you mentioned so I should be close to 400 with a cam that has a lift under .550.
Thanks,
Sleeper
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 290
From: Pasco WA
I have a 228/232 with .600 lift, and it's no noisier than the stock one, that I can tell. Of course, the car's got headers, which have a kind of mild beans in a tin can sound, too. I don't think it's your parts, but maybe it's your lifter preload setting. Do you have headers? That may also be part of where the sound is coming from.
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Burning Brakes
Joined: Jul 2005
Posts: 788
Likes: 33
From: Cedar Rapids IA
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
The 02 & up Z06. see this http://www.c5registry.com/2k2z06/page4.htm
Thanks
Melting Slicks
Joined: Jul 2006
Posts: 3,356
Likes: 1
From: Chesapeake Va
Sounds like you have mechanical issues. No pun intended.
We've done bunches of cams over .600 lift with little to no noise.
Currently have a LS2 with a +.600 24X/24X custom grind that makes NO noise.
We've done bunches of cams over .600 lift with little to no noise.
Currently have a LS2 with a +.600 24X/24X custom grind that makes NO noise.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Thanks,
Sleeper
"AlohaC5" Senior Member
Joined: Jun 2003
Posts: 3,562
Likes: 44
From: Madison, AL
I'll bet you heard the "sewing machine" noise more once you installed your LG Pro headers because any header will allow more valvetrain noise to be heard because the noise is going through relatively thinner stainless steel material compared to the heavy stock cast iron manifolds.
Recommend going back to the 7.400 pushrods because you may be adding excessive lifter preload with the longer pushrods (double check), and probably not reducing the noise any. The 224/224 .567/.567 114 is a good popular cam size. More aggressive ramp rates from the cam could increase this type of noise from the lifters/rockers, e.g., Comp Cam XE vs.XER and higher spring pressure rates.
Recommend going back to the 7.400 pushrods because you may be adding excessive lifter preload with the longer pushrods (double check), and probably not reducing the noise any. The 224/224 .567/.567 114 is a good popular cam size. More aggressive ramp rates from the cam could increase this type of noise from the lifters/rockers, e.g., Comp Cam XE vs.XER and higher spring pressure rates.
Last edited by Gray Ghost GS; Aug 19, 2007 at 03:48 PM.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
I'll bet you heard the "sewing machine" noise more once you installed your LG Pro headers because any header will allow more valvetrain noise to be heard because the noise is going through relatively thinner stainless steel material compared to the heavy stock cast iron manifolds.
Recommend going back to the 7.400 pushrods because you may be adding excessive lifter preload with the longer pushrods, and probably not reducing the noise any. The 224/224 .567/.567 114 is a good popular cam size. More aggressive ramp rates from the cam could increase this type of noise from the lifters/rockers, e.g., Comp Cam XE vs.XER and higher spring pressure rates.
Recommend going back to the 7.400 pushrods because you may be adding excessive lifter preload with the longer pushrods, and probably not reducing the noise any. The 224/224 .567/.567 114 is a good popular cam size. More aggressive ramp rates from the cam could increase this type of noise from the lifters/rockers, e.g., Comp Cam XE vs.XER and higher spring pressure rates.
I'm surely not good at this. I do understand that the LG headers have larger primary tubes that the Bassani headers I had and the Bassani had ticker primary tubes..so I agree that the sound increased when the LG headers were installed.
Now the question is. What length push rods are people using with this cam. I had 7.4 push rods and the sewing machine sound seemed louder. So after measuring the base circle and getting 1.498 mvvette97 did the conversion for me and came up with a 7.425 push rod.
I have the Patriot heads 243 casting with their gold springs. Someone mentioned using a thicker push rod like the Trend .110 wall.
Thanks
Sleeper
Le Mans Master
Joined: Aug 2001
Posts: 8,145
Likes: 1
From: Bradenton FLORIDA
Proper valvetrain geometry & pre-load should result with very little valve train noise. Just ask some of our large cam customers.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
So whats the fix? It may be coming from the thin wall LG headers...I had Bassani LT headers on before and they are thicker and it seemed like less noise...I feel like I'm grabing for straws now on this problem..
Melting Slicks
Joined: Jul 2006
Posts: 3,356
Likes: 1
From: Chesapeake Va
A good way to check is pull a valve cover, and see if the rockers have any slop in them. While you're in there, you can check if the lifters seem bled down.
There has to be a reason. Thats not normal.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
Just guessing, cause thats about all I can do over the 'net. I'd say put a longer puhrod in it. The sound clip you sent me sounded like it didnt have enough lifter preload.
A good way to check is pull a valve cover, and see if the rockers have any slop in them. While you're in there, you can check if the lifters seem bled down.
There has to be a reason. Thats not normal.
A good way to check is pull a valve cover, and see if the rockers have any slop in them. While you're in there, you can check if the lifters seem bled down.
There has to be a reason. Thats not normal.
Melting Slicks
Joined: Jul 2006
Posts: 3,356
Likes: 1
From: Chesapeake Va
You would really have to over shoot the length to cause any damage.
You have about .200 worth of lifter preload, so you've got some room for error.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
I would think you can get 7.450s. if they end up too long, you'll hold the valves open slightly, and it wont start, or start and run terribly.
You would really have to over shoot the length to cause any damage.
You have about .200 worth of lifter preload, so you've got some room for error.
You would really have to over shoot the length to cause any damage.
You have about .200 worth of lifter preload, so you've got some room for error.