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Thread: Roller rocker question
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09-05-2007, 10:17 PM #1
Roller rocker question
I was looking at these roller rocker arms http://www.granatellimotorsports.com...lerrockers.htm on granatelli's website. They claim 8-11% more hp and 10-15% more fuel efficiency. Is this total BS or are these valid claims?
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09-05-2007, 10:18 PM #2
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09-05-2007, 10:28 PM #3
Do you know if they give any hp or any help in fuel efficiency? Basically I'm wondering even if they don't make what they claim, would it still be a reasonable upgrade and be worth their price?
Vote for Pedro.
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09-06-2007, 05:48 AM #4
- Join Date
- Dec 2002
- Location
- n/w chicago
- Age
- 54
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- 6,932
black- 2000 nhra edition formula
youll gain some h.p, not much. maybe 5 rwhp
2000 nhra edition formula
a few bolt ons, 379 rwhp
11.96 @113.25
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09-06-2007, 06:50 AM #5
So pretty much the money could be better spent doing another mod?
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09-06-2007, 07:18 AM #6
- Join Date
- Feb 2006
- Location
- Tinker AFB, Oklahoma
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- 39
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- 185
Midnight Blue- 2000 Camaro Z28
seems like they're usually pretty high on their claims...sorta like SLP
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09-06-2007, 08:39 AM #705 PBM GTOCold Air Inductions CAI,Relocated IAT with omega,Slp Predator tune,Flowmaster axle back with H pipe,Custom tuned TCM.BC Racing coil overs
Sold 01 z28
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09-06-2007, 08:57 AM #8
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09-06-2007, 01:49 PM #9
Well I don't have anything done at the moment. Just looking for a few mods I can start with.
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09-06-2007, 03:32 PM #10
if you want rockers that work, then get the vinci/crane accelerated lift kit. used the 1.8 rockers on the wife's car on stock cam and picked up 17 rwhp. the kit is $669.00 through vinci. comes with rockers, posi-locks, guide plates, screw-in-studs, and shorter pushrods.
Cold 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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09-06-2007, 05:15 PM #11
That's a pretty impressive gain! What other mods does she have? Is that a relatively easy swap?
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09-06-2007, 05:16 PM #12
lid, filter, MAF ends, bassani headers and catted y-pipe, borla exhaust. not too hard to do.
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09-06-2007, 05:22 PM #13
- Join Date
- Dec 2002
- Location
- n/w chicago
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- 54
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- 6,932
black- 2000 nhra edition formula
1.8 rockers will limit what kind of cam a person can get in the future. i advise against it.
i had 1.85 rockers and sold them when i was about to cam the car.
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09-06-2007, 05:27 PM #14
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09-06-2007, 06:03 PM #15
just means don't buy a thunder racing cam. so long as you have proper piston to valve clearance and spring control, going to larger ratio rockers will not limit you in cam choice
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09-06-2007, 06:08 PM #16
here's some actual dyno and track tested data to ponder over. vinci did a comparison of a comp cam and their cam. Project C5 AFR
comp cam 224/224 .581.581 (1.7 rockers) 115 LSA vs vinci 055 cam 216/224 .583/.583 (1.8 rockers) 113 LSA
http://vincihighperformance.com/beck...20tricker.html
the smaller cam with higher ratio rockers made more overall power. now, which would you rather have? and these cams were tested with the stock torque converter.
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09-06-2007, 06:53 PM #17
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09-06-2007, 06:54 PM #18
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09-06-2007, 07:00 PM #19
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09-08-2007, 02:09 PM #20
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