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#1 |
Registered User
Join Date: Apr 2014
Location: Baldwin County, Alabama
Posts: 163
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Rocker arms: roller rocker, stamped steel roller tip, or stock
Any thoughts on what would be best; roller rocker, stamped steel roller tip rocker, or stock type stamped steel rocker?
Stock '85 350 with World Products S/R 170 intake runner, 67cc heads, mild 'RV' cam, performance rebuilt q-jet carb, mild-length headers, th400 trans, stock torque converter, 3.73 L.S. 10-bolt rear axle.
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#2 |
Senior Member
![]() Join Date: Dec 2011
Location: Moraga, CA
Posts: 812
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Re: Rocker arms: roller rocker, stamped steel roller tip, or stock
Engine Masters did a great back-to-back-to-back dyno test for many combinations. Rollers gave zero power difference. The only thing that made more power was picking a higher ratio, either for stamped or rollers. I recommend watching the video. Very educational. I'm using Crane ductile stamped in mine, stock ratio, because I'm keeping stock 1970 Corvette parts and specs.
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(Very) Slow-Going Build Thread: Stock 1970 Short Step with Stock 1970 LT-1 http://67-72chevytrucks.com/vboard/s...d.php?t=567340 |
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#3 |
Registered User
Join Date: Dec 2011
Location: Yuma Arizona
Posts: 1,526
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Re: Rocker arms: roller rocker, stamped steel roller tip, or stock
Stay with stock or go full roller. As stated, you wont gain any significant power unless you change ratio. You will reduce friction and reduce wear to some degree, mostly in the valve guides/stems.
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#4 | |
Registered User
Join Date: Apr 2014
Location: Baldwin County, Alabama
Posts: 163
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Re: Rocker arms: roller rocker, stamped steel roller tip, or stock
Quote:
Got it pulled up and I'm about to watch it while eating lunch. Thanks for the reply and insight.
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![]() /Porterbuilt / Accuair / Bonspeed / Landsail / Auburn Gear / Richmond Gear / Moser / Raybestos / ProMaxx / Edlebrock / Street Demon / Taylor Wire / K&N / MSD / KillMat / SOLD: 1985 GMC Sierra Classic 2500 3+3 Crew Cab Long Bed |
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#5 |
Registered User
Join Date: Apr 2014
Location: Baldwin County, Alabama
Posts: 163
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Re: Rocker arms: roller rocker, stamped steel roller tip, or stock
Thank you for the response. I really appreciate it.
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![]() /Porterbuilt / Accuair / Bonspeed / Landsail / Auburn Gear / Richmond Gear / Moser / Raybestos / ProMaxx / Edlebrock / Street Demon / Taylor Wire / K&N / MSD / KillMat / SOLD: 1985 GMC Sierra Classic 2500 3+3 Crew Cab Long Bed |
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#6 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,936
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Re: Rocker arms: roller rocker, stamped steel roller tip, or stock
I have stamped roller tip rockers in my 350 right now. I got them on a good deal from a buddy who bought them and then never used them. Waste of money if I would have bought them new... no significant gain of any kind, and they are noisy.
Full rollers or nothing. But with a mild "RV" cam and those heads... stock stamped rockers would be just fine. The video from Engine Masters does show a significant gain with roller rockers after switching to a 7/16" screw in stud over a 3/8" screw in stud. The 7/16" studs are less prone to deflection at higher RPM's. So if staying with 3/8" studs and making any kind of higher RPM pulls... it'd be a good idear to invest in a stud girdle. Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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#7 |
Senior Member
![]() Join Date: Dec 2011
Location: Moraga, CA
Posts: 812
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Re: Rocker arms: roller rocker, stamped steel roller tip, or stock
Yes, I forgot the deflection part. Loved that vid.
__________________
(Very) Slow-Going Build Thread: Stock 1970 Short Step with Stock 1970 LT-1 http://67-72chevytrucks.com/vboard/s...d.php?t=567340 |
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#8 |
Registered User
![]() Join Date: Oct 2011
Location: Victoria, B.C
Posts: 3,794
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Yeah...very good video, thanks for sharing on that.
I have heard about the advantages of the 1.6 rockers....even just having them on the exhaust, although I don't have any experience with that. I think some guys have added that 1.6 advantage to basically an otherwise stock engine and cam and ended up with a slightly higher valve lift and more power as a result. What I would be curious about is if anyone knows if a 1.6 rocker can be run with the stock valve cover?....definitive info. All good Coley
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....for some men, there is experience, skill and effort....for the others...there is visa and UPS LOL 1966 Chevy 1/2 ton (Florida- Red/white) 1972 Chevy 1/2 ton (California- Blue/white) 2005 Chevy Silverado HD2500/Duramax 2000 Dodge Ram 1500 |
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#9 | |
Senior Member
![]() Join Date: Dec 2011
Location: Moraga, CA
Posts: 812
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Re: Rocker arms: roller rocker, stamped steel roller tip, or stock
Quote:
Also, on the rocker issue, the official Chevy Power Catalog (in my late 1980s edition), suggested trying higher ratio rockers. They also said try them on intake alone, exhaust alone, and then together and see what performed best.
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(Very) Slow-Going Build Thread: Stock 1970 Short Step with Stock 1970 LT-1 http://67-72chevytrucks.com/vboard/s...d.php?t=567340 Last edited by mattfranklin; 06-07-2018 at 09:38 AM. Reason: brain fart -- I typed lifter instead of rocker |
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