LT1 Roller Rockers Help
Drifting
Joined: Jun 1999
Posts: 1,874
Likes: 1
From: Garden Grove CA
Re: LT1 Roller Rockers Help (RWarner600)
Need more info for a really good reply. I'll presume you still have stock cam and valve springs. This limits you to 1.5 ratio roller rockers. To use 1.6 ratio rockers you need different valve springs - the LT1 springs get uncomfortably close to coil bind with 1.6 ratio (for me anyhow), although there are some who claim no problems with coil bind.
One of the early mods that I did to my LT1 was to install LT4 valve springs and 1.6 ratio rockers - it made a noticeable difference in power.
Good luck, Thomas
One of the early mods that I did to my LT1 was to install LT4 valve springs and 1.6 ratio rockers - it made a noticeable difference in power.
Good luck, Thomas
Melting Slicks
Joined: Jan 2000
Posts: 3,418
Likes: 1
From: NW Chicago Suburbs
Re: LT1 Roller Rockers Help (RWarner600)
I have a set of the GMPP 1.6 rockers on my Impala SS. Over 25K miles with no problems. Don't let anyone con you into using the stock springs. Maybe it'll work if you drive your car like an old lady. But if you rev your car to the redline, be sure to have good springs. If you have the stock LT1 cam, the LT4 springs are a great choice, cost is less than $40, they allow you to use the stock cups and retainers. Cheap insurance.
BTW, the weak stock LT1 springs are within 0.020" of BIND with 1.6 rockers. They are floating the valves at high revs, it's only a matter of time before they cause a dropped valve.
Eric
BTW, the weak stock LT1 springs are within 0.020" of BIND with 1.6 rockers. They are floating the valves at high revs, it's only a matter of time before they cause a dropped valve.
Eric
Advanced
Joined: Jun 2002
Posts: 71
Likes: 0
From: Hummelstown Pa.
Re: LT1 Roller Rockers Help (RWarner600)
Just how hard is it to install roller rockers? It doesn't look like it would be very difficult or am I fooling myself? Just how much difference do roller rockers make and is it worthwhile? I have a set of 1.6's. Do you have to put higher valve covers on?
Oh! How do you guys place pictures here?
Hello to the 40th anniversary people above. I also have a 40th and love her to death. gloria
[Modified by snake killer, 6:15 PM 6/17/2002]
[Modified by snake killer, 6:19 PM 6/17/2002]
[Modified by snake killer, 6:20 PM 6/17/2002]
Oh! How do you guys place pictures here?
Hello to the 40th anniversary people above. I also have a 40th and love her to death. gloria
[Modified by snake killer, 6:15 PM 6/17/2002]
[Modified by snake killer, 6:19 PM 6/17/2002]
[Modified by snake killer, 6:20 PM 6/17/2002]
Team Owner
Joined: Nov 1999
Posts: 32,782
Likes: 11
From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
Cruise-In VI Veteran
Cruise-In VII Veteran
Re: LT1 Roller Rockers Help (RWarner600)
I run 1.5s :confused:
Burning Brakes
Joined: Feb 1999
Posts: 1,157
Likes: 3
From: Encino CA
Re: LT1 Roller Rockers Help (snake killer)
I have a set of roller rockers and springs in my garage still waiting to be installed. I have heard the rockers are fairly easy but I am past the days of doing self-installations. Even if you do decide to do the rockers yourself, I have heard that you should also do springs and that is much more difficult and time consuming.
As an aside, notice you live in Hummelstown--do you know the Ramis'?
As an aside, notice you live in Hummelstown--do you know the Ramis'?
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Melting Slicks
Joined: Jun 2001
Posts: 3,444
Likes: 0
Re: LT1 Roller Rockers Help (snake killer)
Just how hard is it to install roller rockers? It doesn't look like it would be very difficult or am I fooling myself? Just how much difference do roller rockers make and is it worthwhile? I have a set of 1.6's. Do you have to put higher valve covers on?
Oh! How do you guys place pictures here?
Hello to the 40th anniversary people above. I also have a 40th and love her to death. gloria
Oh! How do you guys place pictures here?
Hello to the 40th anniversary people above. I also have a 40th and love her to death. gloria
Anyway, you need to replace the springs with Lt4 springs or whatever is matched to the rockers/cam lift.
To change the springs you need a valve spring compressor. There are three kinds.
A c-clamp type which is only for when the heads are off the car.
A jaw like cork screw like thing. On my 92 C4 I couldn't use it on #8 cyl as the EGR tubing got in the way.
A pry-bar looking thing which will work on all valves.
The jaw like one requires less strength and is much easier to get the locks in. But it is also takes longer to use than the prybar one.
It is more difficult to get the locks in with the prybar type, you are more likely to drop the lock and have to fish it out.
Be sure have a new set of valve seals as they are sold separately.
You will have to use a dremmel to cut off the drip tabs from the inside of the stock covers for the larger RR's. Make suer you clean all the metal dust out of them thoroughly!
Good luck
