Rockers for my 383
On The Tree
Joined: Dec 2004
Posts: 124
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From: Northville, Michigan
I have used Crane Gold Race aluminum roller rocker arms in my engine for the past 7 years.
They come in two different ratios:
1.7:1 - part number 144750-16 available at Summing Racing for approximately $860.
1.8:1 - part number 144759-16 available at Summit Racing for approximately $860.
The 1.8:1 rocker arms will increase the lift at your valve to .635" and .648".
For long term reliability I would use stock rockers and upgrade the trunnions...I like the stock ones because they are easier to set up than the roller rockers, but if you got the money and the know how roller rockers can net a few extra hp...
Thread Starter
12 Second Club
Joined: Aug 2005
Posts: 222
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From: Paradise, Newfoundland
The reason I'm looking at new rockers is because the cam above is new, and will be installed soon. The rockers which are in the car now are COMP 1.85.s and some people tell me not to use them because they will upset the harmonics of the engine.
Anyone agree or disgree with that statement?
Anyone agree or disgree with that statement?
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Thread Starter
12 Second Club
Joined: Aug 2005
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From: Paradise, Newfoundland
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Staging Lane
Joined: Feb 2010
Posts: 82
Likes: 0
I personally had major valve float with harlard sharp 1.7 rockers on my 383. I have an aggressive .620 lift 240 duration cam. I was running TFS heads which have a heavier intake valve. I swapped to yella terra 1.7 lightweights, fresh springs, TEA LS3 hollowstem turned down intake valves and gained 40hp/30tq to the tire.
I talked to a lot of people about this. The only thing that is bad about the stock rocker with trununion upgrade is cams with .600 and over lift, it will cause the guides to wear unless they are bronze.
I would NOT run those 1.8 or 1.85's you said you have with stock rockers. Just spend the money on the yella terras, they are worth it.
I talked to a lot of people about this. The only thing that is bad about the stock rocker with trununion upgrade is cams with .600 and over lift, it will cause the guides to wear unless they are bronze.
I would NOT run those 1.8 or 1.85's you said you have with stock rockers. Just spend the money on the yella terras, they are worth it.
does this happen to every one? no, but everyone has there .02 about it, im up in the air about it as well
Staging Lane
Joined: Feb 2010
Posts: 82
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if you HAVE bronze they will wear out faster, the bronze guides are softer then what the factory heads use, thats why TF and such state you should run roller rockers
does this happen to every one? no, but everyone has there .02 about it, im up in the air about it as well
does this happen to every one? no, but everyone has there .02 about it, im up in the air about it as well
On my old 346 motor with .650 lift cam and ported 243's I had some guid wear when it was tore down. The companies I talked to about it had different opinions, I have always prefferred to try andf do it right the 1st time
Thanks, thats what I meant, the powdered metal ones are the better ones.
On my old 346 motor with .650 lift cam and ported 243's I had some guid wear when it was tore down. The companies I talked to about it had different opinions, I have always prefferred to try andf do it right the 1st time
On my old 346 motor with .650 lift cam and ported 243's I had some guid wear when it was tore down. The companies I talked to about it had different opinions, I have always prefferred to try andf do it right the 1st time
