Roller tip rockers for 84 Vette...
Le Mans Master
Joined: Dec 2003
Posts: 5,867
Likes: 17
From: Phoenix Arizona
I've used fairly inexpensive Harlan Sharp roller tip rockers in the past with good luck. On the other hand, I've had problems with Comp Cam roller tip rockers and can't recommend them.
Le Mans Master
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
Your loosing one advantage by not using a full roller rocker. The half ball under the nut holding the rocker in position on the studs have a large surface that mates with the rocker. Even with oil, this large surface generates a lot of heat. A standard roller will reduce oil temperatures by about 10 degrees just with this simple exchange. You can buy a good full roller rocker if you look around.
You will have to cut off the drip tabs. You should have no issues using 1.5. A 1.6 rocker might require a taller gasket.
You will have to cut off the drip tabs. You should have no issues using 1.5. A 1.6 rocker might require a taller gasket.
Le Mans Master
Joined: May 2006
Posts: 7,708
Likes: 266
From: indy indiana
Your loosing one advantage by not using a full roller rocker. The half ball under the nut holding the rocker in position on the studs have a large surface that mates with the rocker. Even with oil, this large surface generates a lot of heat. A standard roller will reduce oil temperatures by about 10 degrees just with this simple exchange. You can buy a good full roller rocker if you look around.
You will have to cut off the drip tabs. You should have no issues using 1.5. A 1.6 rocker might require a taller gasket.
You will have to cut off the drip tabs. You should have no issues using 1.5. A 1.6 rocker might require a taller gasket.
Last edited by ghoastrider1; May 2, 2016 at 08:00 AM.
Team Owner
Joined: Sep 2003
Posts: 20,179
Likes: 673
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
So here's my 0.02, you're wasting your money. If your looking for cheap power, there's little to do without reprogramming the ECM. And that will cost you a bunch. A nice Magnaflo cat and muffs will help some. Roller tips alone will net you nothing.
BTW "new" is knew.
Thread Starter
Instructor
Joined: Feb 2016
Posts: 224
Likes: 14
From: Tijuana Drunken
Ya know you've got a Crossfire motor that only a few have spent the money to mod. The rest are fighting to keep them running right.
So here's my 0.02, you're wasting your money. If your looking for cheap power, there's little to do without reprogramming the ECM. And that will cost you a bunch. A nice Magnaflo cat and muffs will help some. Roller tips alone will net you nothing.
BTW "new" is knew.
So here's my 0.02, you're wasting your money. If your looking for cheap power, there's little to do without reprogramming the ECM. And that will cost you a bunch. A nice Magnaflo cat and muffs will help some. Roller tips alone will net you nothing.
BTW "new" is knew.
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Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 412
From: WV
Ya know you've got a Crossfire motor that only a few have spent the money to mod. The rest are fighting to keep them running right.
So here's my 0.02, you're wasting your money. If your looking for cheap power, there's little to do without reprogramming the ECM. And that will cost you a bunch. A nice Magnaflo cat and muffs will help some. Roller tips alone will net you nothing.
BTW "new" is knew.
So here's my 0.02, you're wasting your money. If your looking for cheap power, there's little to do without reprogramming the ECM. And that will cost you a bunch. A nice Magnaflo cat and muffs will help some. Roller tips alone will net you nothing.
BTW "new" is knew.
Le Mans Master
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
Your stamped rocker arms are supposed to be a 1.5 ratio. But because they are stamped the ratio is often less than that. The 1985 responded to a split ratio of 1.5 on the intake and 1.6 on the exhaust. This combination idled a little better than 1.6's all the way around. You MIGHT pick up 5-7 HP which you really would not notice, especially with stock iron heads.
Melting Slicks
Joined: Jul 2002
Posts: 2,223
Likes: 556
From: Tallahassee fl
roller tip rockers are a waste of time, most of the friction is at the fulcrum of the rocker, not the tip. Going full roller is maybe worth it. The split set of 1.5 1.6 I have done the other way around on an LT1 (1.6 intake, 1.5 exhaust). the rocker is a multiplier on the cam number so a bigger rocker number behaves like a mild cam.
Safety Car
Joined: Nov 2009
Posts: 3,973
Likes: 341
From: Adelaide South Australia
1.6 roller tips will give you .030 tho more cam lift,
if you rev your engine a bit tho they can allow the pushrods to pop out the sides !
(I had this happen several times on my old setup till I went to full roller rockers)
if you rev your engine a bit tho they can allow the pushrods to pop out the sides !
(I had this happen several times on my old setup till I went to full roller rockers)