Q's: What's the difference between a roller block and a non-roller block?
10-14-2003, 04:56 PM
#1
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Q's: What's the difference between a roller block and a non-roller block?
Is it just whether the lifter valley is drilled for the girdle tray thingy?
Is there any difference in the cam? are they interchangeable?
When did GM switch to the roller block in the vette?
Did they switch to roller lifters at the same time, or later on?
Which lifters allow you to do a cam swap without pulling the intake?
:steering:
Is there any difference in the cam? are they interchangeable?
When did GM switch to the roller block in the vette?
Did they switch to roller lifters at the same time, or later on?
Which lifters allow you to do a cam swap without pulling the intake?
:steering:
10-14-2003, 05:02 PM
#2
Race Director
Re: Q's: What's the difference between a roller block and a non-roller block? (CentralCoaster)
I always thought a complete "Roller" meant everything from the cam and lifters to the rockers. (Roller)
The cam should be one designed to work with roller lifters and nothing else.
....though I could be wrong.
:chevy:
The cam should be one designed to work with roller lifters and nothing else.
....though I could be wrong.
:chevy:
10-14-2003, 05:05 PM
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Re: Q's: What's the difference between a roller block and a non-roller block? (CentralCoaster)
I think roller cams have flat lobes, while non-rollers have a slight angle to them... which when combined with a slightly radiused lifter, will spin the lifter. :lurk:
10-14-2003, 05:48 PM
#4
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Re: Q's: What's the difference between a roller block and a non-roller block? (CentralCoaster)
While I can't answer all of the other questions, 1987 was the first year for the roller block in the Corvette.
Ron
Ron
10-14-2003, 06:05 PM
#5
Le Mans Master
Re: Q's: What's the difference between a roller block and a non-roller block? (CentralCoaster)
I think the angle in which the lifter cylinders are is different in the two blocks. The cams are different because one uses flat tappet lifters and the other uses roller tipped lifters. A flat tappet cam will have slower ramps on the cam lobes than a roller cam.
I do not know of any standard lifters that will allow you to do a cam change without pulling the intake. There are some spring loaded after market sets that will lift off the cam when the rockers are loosened but I have never seen anyone use them.
I do not know of any standard lifters that will allow you to do a cam change without pulling the intake. There are some spring loaded after market sets that will lift off the cam when the rockers are loosened but I have never seen anyone use them.
10-14-2003, 06:23 PM
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Re: Q's: What's the difference between a roller block and a non-roller block? (CentralCoaster)
Roller cam started in 87, meaning it has roller lifters instead of the older flat tappet hydraulic lifters.
The cams are not interchangeable.
The earlier blocks dont have the block tapped for it, or at least thats what i understand of it. Lingenfelter says no block work is required, some builders say some minor stuff is required. I dont know exactly what the situation is.
The cams are not interchangeable.
The earlier blocks dont have the block tapped for it, or at least thats what i understand of it. Lingenfelter says no block work is required, some builders say some minor stuff is required. I dont know exactly what the situation is.
10-14-2003, 07:06 PM
#7
Drifting
Re: Q's: What's the difference between a roller block and a non-roller block? (vader86)
Roller cam blocks have the machine work for the timing chain plate, the knock sensor, and the 1 pcs rear main seal.
10-14-2003, 07:08 PM
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Re: Q's: What's the difference between a roller block and a non-roller block? (ZylaRace)
Roller cam blocks have the machine work for the timing chain plate, the knock sensor, and the 1 pcs rear main seal.
10-15-2003, 06:27 AM
#9
Melting Slicks
Re: Q's: What's the difference between a roller block and a non-roller block? (CentralCoaster)
If you're just looking at bare blocks, the roller block has a raised area in front of block with two tapped holes around the cam bearing hole under the timing chain gear (for a cam retaining plate).
10-15-2003, 07:56 AM
#10
Le Mans Master
Re: Q's: What's the difference between a roller block and a non-roller block? (Rich B.)
Again, Vader got in just before me...
86+ = 1 piece rear main seal
87+ = Roller Lifters
When people say they've got a "roller" block, they're usually meaning they have roller lifters. Now, when people say they're a "FULL roller" motor, they're usually meaning they also have roller rocker arms. However, when they say "SOLID roller", they're meaning they have a SOLID roller camshaft...which I have NO clue of what the difference between SOLID and Hydraulic roller is...
86+ = 1 piece rear main seal
87+ = Roller Lifters
When people say they've got a "roller" block, they're usually meaning they have roller lifters. Now, when people say they're a "FULL roller" motor, they're usually meaning they also have roller rocker arms. However, when they say "SOLID roller", they're meaning they have a SOLID roller camshaft...which I have NO clue of what the difference between SOLID and Hydraulic roller is...
10-15-2003, 01:06 PM
#11
Race Director
Re: Q's: What's the difference between a roller block and a non-roller block? (TIMSPEED)
So are you guys saying that 87+ L98's, LT-1's, and LS-1's all have roller lifters stock? :skep:
10-15-2003, 01:53 PM
#12
Le Mans Master
Re: Q's: What's the difference between a roller block and a non-roller block? (vvv90)
Yes, hydraulic roller lifters.
10-15-2003, 01:57 PM
#13
Team Owner
Re: Q's: What's the difference between a roller block and a non-roller block? (Vette92)
A roller lifter block has the valley tapped for the girdle. Also around each lifter pair is a machined surface where the lifter plates sit that keep them from rotating inside the lifter boss.
On the front of the block also goes a thrust plate that is bolted in around the cam in two spots with a bolt in the 3 & 9 spots. I have found through personal experience that the taps for the thrust plate are not identical on all roller blocks. My 4-bolt truck roller block had its two holes slightly further out than my 2-bolt corvette roller block.
On the front of the block also goes a thrust plate that is bolted in around the cam in two spots with a bolt in the 3 & 9 spots. I have found through personal experience that the taps for the thrust plate are not identical on all roller blocks. My 4-bolt truck roller block had its two holes slightly further out than my 2-bolt corvette roller block.
10-15-2003, 07:11 PM
#14
Melting Slicks
Re: Q's: What's the difference between a roller block and a non-roller block? (scorp508)
My 4-bolt truck roller block had its two holes slightly further out than my 2-bolt corvette roller block.
oops, 7:00... :sleep:
