Solid roller/hydraulic
Thread Starter
10 Second Club
iTrader: (25)
Joined: Dec 2004
Posts: 2,554
Likes: 1
From: Kannapolis, NC
Solid roller/hydraulic I saw somewhere on here before about a rule of thumb that a solid roller was like 10 degrees more than a hydraulic when figuring out cam specs. Was wondering if this is the case or is there a different comparison. I know there are too many variables but I am sure there is some kind of info that will get you close.
ex: Hyd 224/244 would equal 234/234 solid??
ex: Hyd 224/244 would equal 234/234 solid??
TECH Apprentice
Joined: Sep 2005
Posts: 334
Likes: 1
Typically, a solid "acts" like a smaller cam due to faster ramp rates. However, on these larger base circle applications, the difference is not so great. An aggressive hydraulic could be equal to or greater than a tight lash "street" solid roller profile.
Thread Starter
10 Second Club
iTrader: (25)
Joined: Dec 2004
Posts: 2,554
Likes: 1
From: Kannapolis, NC
The large hydraulic I ran in the past was a 257/266 110 and I am looking at a solid 253/259 110. It seems kind of small in my opinion and I want to make sure of what I am getting.
Thread Starter
10 Second Club
iTrader: (25)
Joined: Dec 2004
Posts: 2,554
Likes: 1
From: Kannapolis, NC
Being that it will be alot more involved to do cam swaps with the solid roller setup without having the lifter buckets to hold up the lifters during swaps I want to hit this setup the first time around. Thanks guys.
Trending Topics
Low RPM oiling shouldn't be an issue with the newer design lifters. If my heads ever get finished ill let you know how things go.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0
Brett Foote
10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever
Verdad Gallardo Thread Starter
10 Second Club
iTrader: (25)
Joined: Dec 2004
Posts: 2,554
Likes: 1
From: Kannapolis, NC
Typically, you lose about 4 degrees duration for every .016" valve lash from the advertised spec with a solid cam. For instance, a 240 degree @ .050" solid with .016" lash would actually come in around 236 degrees @ .050". Again, I say about, and typically. Some manufacturers grind their cams with more aggressive ramp profiles than others and will lose a little less duration, say 1 to 1 1/2 degree.
Comp Cams has a solid roller lifter that has direct pressure lubrication to the roller bearing, but they are very expensive. They were made specifically for long life on the street. Standard solid rollers rely on splash lubrication and generally don't last as long (especially on street cars) as hydraulic rollers. You should inspect the bearings on street solid rollers at least once a year and do periodic valve lash adjustments. If you notice the valve lash adjustments not holding, obviously something's wrong.
Comp Cams has a solid roller lifter that has direct pressure lubrication to the roller bearing, but they are very expensive. They were made specifically for long life on the street. Standard solid rollers rely on splash lubrication and generally don't last as long (especially on street cars) as hydraulic rollers. You should inspect the bearings on street solid rollers at least once a year and do periodic valve lash adjustments. If you notice the valve lash adjustments not holding, obviously something's wrong.
Thread Starter
10 Second Club
iTrader: (25)
Joined: Dec 2004
Posts: 2,554
Likes: 1
From: Kannapolis, NC
Typically, you lose about 4 degrees duration for every .016" valve lash from the advertised spec with a solid cam. For instance, a 240 degree @ .050" solid with .016" lash would actually come in around 236 degrees @ .050". Again, I say about, and typically. Some manufacturers grind their cams with more aggressive ramp profiles than others and will lose a little less duration, say 1 to 1 1/2 degree.
Comp Cams has a solid roller lifter that has direct pressure lubrication to the roller bearing, but they are very expensive. They were made specifically for long life on the street. Standard solid rollers rely on splash lubrication and generally don't last as long (especially on street cars) as hydraulic rollers. You should inspect the bearings on street solid rollers at least once a year and do periodic valve lash adjustments. If you notice the valve lash adjustments not holding, obviously something's wrong.
Comp Cams has a solid roller lifter that has direct pressure lubrication to the roller bearing, but they are very expensive. They were made specifically for long life on the street. Standard solid rollers rely on splash lubrication and generally don't last as long (especially on street cars) as hydraulic rollers. You should inspect the bearings on street solid rollers at least once a year and do periodic valve lash adjustments. If you notice the valve lash adjustments not holding, obviously something's wrong.
Thank you. We are going with a set of Crower 1:8 rockers. While on the subject. What is the best way to adjust lash or atleast know you are on the base circle? In the past I would spin motor until rocker came all the way up and I would go alittle past that. Some like the full lift and then one full revolution on the crank. Thanks again for the help.
EOIC is the method of choice for most builders. That is, Exhaust Open Intake Close.
Rotate the engine until an exhaust valve just starts to open, then set the intake lash for that cylinder. Continue to rotate the engine until the intake valve opens all the way and then starts to go back down (close). Then set the exhaust lash. Continue to do this for all cylinders.
Rotate the engine until an exhaust valve just starts to open, then set the intake lash for that cylinder. Continue to rotate the engine until the intake valve opens all the way and then starts to go back down (close). Then set the exhaust lash. Continue to do this for all cylinders.
Thread Starter
10 Second Club
iTrader: (25)
Joined: Dec 2004
Posts: 2,554
Likes: 1
From: Kannapolis, NC
Now knowing the difference between the 2 types of cams how does the addition of a 1.8 rocker over a 1.7 change things? I would assume it would increase your lift/duration to minimize the effect of going solid roller???
EOIC is the method of choice for most builders. That is, Exhaust Open Intake Close.
Rotate the engine until an exhaust valve just starts to open, then set the intake lash for that cylinder. Continue to rotate the engine until the intake valve opens all the way and then starts to go back down (close). Then set the exhaust lash. Continue to do this for all cylinders.
Rotate the engine until an exhaust valve just starts to open, then set the intake lash for that cylinder. Continue to rotate the engine until the intake valve opens all the way and then starts to go back down (close). Then set the exhaust lash. Continue to do this for all cylinders.
THANK YOU, THANK YOU, THANK YOU!!!!
Please get someone to make this a sticky!
I have to explain this procedure over the phone COUNTLESS times every week for customers (or tech help theives
) to check lifter preload or lash...Thanks,
Shane
