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Thread: LS1 and 1.85 rocker arms?
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01-04-2009, 02:07 PM #1
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Silver- 99 SS
LS1 and 1.85 rocker arms?
I have a question. I am considering going to 1.85 ratio rocker arms.
Currently, I have Comp Cams valve springs, do these need to change? They have a spring rate of 441 lbs/in.
My cam dimensions are as follows.
Intake Exhaust
Intake Gross valve Lift .525 .532
Lobe lift .3090 .3130
Will these springs work and will the valve cover require modifications?
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01-04-2009, 04:01 PM #2
What rockers are they?
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01-04-2009, 05:39 PM #3
I wouldn't go with 1.85 rockers. If anything, I'd get Crane quick-lift rockers. The geometry is different.
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01-06-2009, 01:50 PM #4
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Silver- 99 SS
Okay, I am sort of changing my mind.
I am thinking about going with the Crane Cams, Gold Race Extruded Aluminum Roller Rocker Arms for LS1/LS6 in 1.7 Ratio.
My concern is why do I have to concern myself with lifter bleed down. Just trying to understand why the bleeding is necessary. I read SLPs instructions yes I know they suck but they do not concern themselves with bleeding.
Just trying to understand why I do with the crane Rocker arms?
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01-06-2009, 02:52 PM #5
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Blue 1997 Trans Am(Sold)- Pewter 2001 Trans Am Vert
what else are you doing with the rocker arm change?
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01-07-2009, 04:26 AM #6
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Silver- 99 SS
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01-07-2009, 07:37 AM #7
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01-07-2009, 09:40 AM #8
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Silver- 99 SS
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01-07-2009, 11:19 AM #9
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01-07-2009, 12:07 PM #10
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01-07-2009, 12:07 PM #11
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Silver- 99 SS
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01-14-2009, 11:33 AM #12
SLP rockers are just like stock style. non adjustable. the crane are fully adjustable. so you need to set correct lifter preload. ran them on both of my cars. got a solid 17 rwhp gain using the 1.8 rockers.
here is how you adjust them
http://vincihighperformance.com/LS1%...TRUCTIONS.HTMLCold Air Intake, Muffler Delete, Vinci High Performance Dual Valve Springs, Hardened Pushrods, Yella Terra 1.85 Rockers, Some Hydropdipped Stuff, Strut Tower Brace, Some SS Badges, boost/vacuum gauge, fuel pressure gauge, some checkered stripes, drilled/slotted rotors, ZL1addons Stealth wickerbill, Ruxifey LED side markers
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