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#1 |
Registered Member
Join Date: Feb 2000
Location: Tampa Florida
Posts: 50
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![]() Does anyone know what kind of performance gains, if any, should I expect from a good set of roller rocker arms on my 289?
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#2 |
Registered Member
Join Date: Sep 1998
Location: Millburn, NJ
Posts: 310
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![]() It depends on the cam you get / how many R's you want to turn.
You can go really wild with roller rockers but you sacrifice smooth idle. -JON |
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#3 |
Registered Member
Join Date: Nov 1999
Location: So. Cal.
Posts: 16
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![]() You will notice NO difference in power if just the stock rockers were replaced with roller rockers.You have to change the cam with a higher performance one and then the roller rockers would be worth it.A roller cam like late model 5.0s have would make a difference,thats parts of the reason newer 302s run better than old ones,but to change an older engine to roller cam is kind of expensive.
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#4 |
Registered Member
Join Date: Feb 2000
Location: Tampa Florida
Posts: 50
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![]() I already have a hydraulic lift cam by Cam Dynamics on my car. I'm not sure of the specs because I didn't get it brand new however, it begins to make power from 2800 on up. Would Roller Rocker Arms be worth the investment?
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#5 |
Registered Member
Join Date: Nov 1999
Location: So. Cal.
Posts: 16
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![]() Probably wouldn't hurt to try.I have Comp Cam Magnum roller tip rockers in both my 351W and 289 and they work good.The full roller rockers with roller fulcrum and tip would be overkill on a mild motor and more money.Don't expect to feel much difference with either one though.If you go with the Magnum rockers make sure you get the right ones.They make a "rail" type and non-"rail" type.Good luck.
------------------ '62Falcon 351W '58 Morris Minor 289/C4 "Just Falcon Around" |
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#6 |
Registered Member
Join Date: Oct 1998
Location: Az
Posts: 854
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#7 |
Registered Member
Join Date: Sep 1999
Location: rowlett tx,usa
Posts: 18
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![]() all a other than stk rocker does is change the geometry of the valve train,in other words it will give you a slightly larger cam by changing ratio instead of having to change cams, try the 1.6/1.7 trick. you have to remember that the exhaust is already at a disadvantage because of smaller valve and port
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#8 |
Registered Member
Join Date: Sep 1999
Location: rowlett tx,usa
Posts: 18
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![]() also,sounds like you have a healthy came if it doesnt make power till 2800 rpm,do you have manual or auto trans,if auto, do you have a stall converter?
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#9 |
Registered Member
Join Date: Feb 2000
Location: Tampa Florida
Posts: 50
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![]() I have a manual close ratio top loader with 4:11 gears in the rear. Do you have any extra advice??
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#10 |
Registered Member
Join Date: Sep 1999
Location: rowlett tx,usa
Posts: 18
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![]() what all have you done to the engine? do you know what cam you have?
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#11 |
Registered Member
Join Date: Feb 2000
Location: Tampa Florida
Posts: 50
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![]() As far as the specs on the cam, I'm not sure because it was one my dad had layin' around in the garage. As for the engine, I have an Edelbrock 4v, Edelbrock manifold, K&N w/ 1"carb spacer, 160deg. thermo., flo kool water pump, tri y headers, and 2 1/2" exh.w/Hpipe
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