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Thread: what is better?
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10-31-2005, 02:53 PM #1
- Join Date
- Aug 2005
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- Saskatchewan
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- 42
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- 90
White- 1998 Camaro SS
what is better?
1.8 rockers or cam and stock rockers.
Alot of the aftermarket cams say they don't reccomend the 1.8 rockers, but when people like SLP sell a performance pac they sell the 1.8 rockers and no cam. How mush hp will just the 1.8 rockers provide over stock?
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10-31-2005, 05:51 PM #2
- Join Date
- Dec 2002
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- n/w chicago
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- 54
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- 6,932
black- 2000 nhra edition formula
i gained 9 rwhp with the rockers.
i sold the rockers and added a cam, a 39 h.p bump that you can feel all the way threw the power band.
my vote is for the cam.2000 nhra edition formula
a few bolt ons, 379 rwhp
11.96 @113.25
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10-31-2005, 10:51 PM #3
I have a cam that requires 1.7 and they sent me 1.8's on accident and let me tell you, it threw my valve geometry off and I ended up with a bent valve because some cams have a fast ramp rate and with 1.8's, you can actually float the valves open. Research your cam and valvetrain parts and find the best setup for your application. Most custom grinds from Thunder Racing I will let you know right now require 1.7's.
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11-01-2005, 07:45 AM #4BlackHawk T/AGuest
The rocker ratio multiplies the lift of the cam...meaning if you have a high lift cam already (rated at 1.7) it can go way too high with a 1.8 ratio and the valve will actually hit the piston.
Say its a .585" lift, that number is figured with a 1.7 rocker ratio. To figure out what it would be with 1.8 you would take .585 / 1.7, then take the answer x1.8. You get about .620".
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11-06-2005, 01:39 AM #5
I would go with a properly specified cam before rockers. Rockers can alter the valvetrain geometry and cause more problems than they are worth. The stock rockers are pretty good.
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11-06-2005, 06:42 AM #6
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- Aug 2005
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- Thornton, CO
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- 23,773
Red Tint Jewelcoat- 2008 Trailblazer SS
I like my stock rockers....
2008 Trailblazer SS
Yank PTB3600, Kooks 1 7/8" LT's, 4" intake, E-fans, Magnaflow, Sonnax kit, tranny cooler, tune.
Lowered, HID's, tinted.
1999 Pontiac Trans Am WS.6 #1747 SOLD
531.1 RWHP 481.3 FT/Pounds all motor.
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