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#1 |
Addicted to Chevy
Join Date: Dec 2004
Location: Tyler, Tx
Posts: 857
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Roller rockers
On my mild 350, would simply replacing the mechanical rockers with roller rockers make a noticable difference? I have a set that was given to me, and was just thinking that if ireplaced them, would it be worth it. What are the pros/cons of this swap, if i choose to do so?
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#2 |
Registered User
Join Date: Jun 2004
Location: Saskatchewan, Canada
Posts: 1,368
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Re: Roller rockers
You wouldn't notice any performance gains, and they might not fit under stock height valve covers or clear the internal baffles, also if they are aluminum over time could stress crack but not likely with a mild setup. On the good they were free, and they will cause less valve tip wear and reduce some of the valvetrain heat caused by the stockers. The ratio will also be more consistant from rocker to rocker. So you decide if it's worth your time to change them or not.
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#3 |
Addicted to Chevy
Join Date: Dec 2004
Location: Tyler, Tx
Posts: 857
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Re: Roller rockers
hmmmmmmmmmmm....... probably not. May just use them on a future engine build....
thanks for the input |
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#4 |
Registered User
Join Date: Nov 2003
Location: Alexandria, VA
Posts: 1,534
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Re: Roller rockers
What brand/model are they?
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'72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction. ![]() ![]() ![]() |
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#5 |
Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
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Re: Roller rockers
Take it from someon that has the experience with a lower quality roller rocker install. The better ones will last longer and give a longer life to your engine. however, there is probably a good reason the items were given away, rather than sold.
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#6 |
Addicted to Chevy
Join Date: Dec 2004
Location: Tyler, Tx
Posts: 857
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Re: Roller rockers
im pretty sure they are Crane? they are at my parents so i cant honestly tell ya
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#7 |
Senior Member
![]() Join Date: Jul 2006
Location: Leander, Texas
Posts: 850
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Re: Roller rockers
Crane should be o.k. Like mentioned earlier though it's not worth it to put the cheapo rockers on. The only way you would notice a performance increase would be if they were 1.6 ratio or better. But, if that were the case you'd need to make sure you have enough valve clearance.
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#8 |
Addicted to Chevy
Join Date: Dec 2004
Location: Tyler, Tx
Posts: 857
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Re: Roller rockers
but even if they were a good brand and ratio, and i could easily get new valve covers, no wonderful improvements would be noted, correct?
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#9 |
Account Suspended
Join Date: Sep 2005
Location: Monroe, WA
Posts: 3,815
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Re: Roller rockers
No performance benefit at all to roller (or roller-tip) rockers - the intent is to allow higher RPM/higher lift than what the stock stamped steel rockers can handle. This is another "race only" part that gets a lot of use in mild street engines.
Generally unless the engine is making > 1.2 HP/CID or seeing beyond 6,000 RPM regularly I recommend the Crane stamped-steel rockers with Parkerized and grooved rocker balls - cheap and reliable. |
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#10 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: Roller rockers
How many miles on the engine?Is it a good time for a cam?I`d only bother with the new rockers if I was replacing the cam & lifters.
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#11 |
Addicted to Chevy
Join Date: Dec 2004
Location: Tyler, Tx
Posts: 857
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Re: Roller rockers
only about 12-15000 on the rebuild. No new cam necessary.
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#12 | ||
Registered User
Join Date: Oct 2006
Location: Cheney, KS
Posts: 669
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Re: Roller rockers
Quote:
Theres no real benifit on a street driven vehicle like everyone else said...faster revving is the only thing I would add.
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#13 |
Registered User
Join Date: Apr 2006
Location: southern Il
Posts: 335
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Re: Roller rockers
rocker arms are a wear item and need to be replaced as often as valve springs
put them on it will not hurt if they are 1.5 they will not pull on the studs any more than the stockers if you are running under the 400hp 6k rpm line then you can get away with pinning the studs instead of spending big bucks on guideplates and machining the guide bosses Last edited by jamon8; 01-13-2008 at 08:09 AM. |
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#14 |
Addicted to Chevy
Join Date: Dec 2004
Location: Tyler, Tx
Posts: 857
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Re: Roller rockers
thanks for the info guys!
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#15 |
Registered User
Join Date: Jun 2007
Location: Phx, Az
Posts: 51
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Re: Roller rockers
I would put them on. You will probably need different valve covers but you can get tall stamped steal ones pretty cheap. The will give you a little bit of performance gain. I beleave crane's add claims 10-15hp just by changing to the roller rockers. They greatly reduce the valve train friction. Have you ever rotated an engine over by hand with just the crank and pistons in? it turns over pretty easy. Then when you add all the cam lifters and set the rockers it is a whole lot harder to turn. The roller rockers will be more consistant ratio all the way across. You don't need screw in studs or guide plates they will align just lock the stock ones. You only need screw in studs or pinned press ins if you are running a really high lift cam and heavy valve springs.
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#16 | |
Senior Member
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Location: Leander, Texas
Posts: 850
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Re: Roller rockers
Quote:
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