Roller Rockers Comp or Scorpion?
#1
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Car: 89 IROC
Engine: 305 TPI / ZZ4 cam
Transmission: Stage 2 700R4, LS1 driveshaft
Axle/Gears: Strange 3.42 w/ Auburn
Roller Rockers Comp or Scorpion?
I'm looking at swapping the rockers on my 305 TPI to full roller. It has a ZZ4 cam, Comp CM rods and stock iron heads (will swap in 305 TFS heads later).
Which would be the better choice, Comp Magnum Pro or Scorpion Alum.?
Is there any difference?
Thanks
Which would be the better choice, Comp Magnum Pro or Scorpion Alum.?
Is there any difference?
Thanks
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Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
Re: Roller Rockers Comp or Scorpion?
The ultra pro-mags are a better and more durable rocker. As theyre made of steel, they have a larger trunion, and dont suffer from metal fatigue that the aluminum ones do. Aluminum does not have infinite fatigue life like ferrous metals do. Given enough time, aluminum rockers will fail.
I have a set of the ultra pro-mags, and so far, theyre very quiet and seem to work quite well.
I have a set of the ultra pro-mags, and so far, theyre very quiet and seem to work quite well.
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
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Re: Roller Rockers Comp or Scorpion?
Ferrous metal? The Comp Cams pro mag or whatever they're called now is stainless. Still much better than any aluminum rocker. Less weight on the valve.
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Re: Roller Rockers Comp or Scorpion?
[QUOTE=dimented24x7;5132059]The ultra pro-mags are a better and more durable rocker. As theyre made of steel, they have a larger trunion, and dont suffer from metal fatigue that the aluminum ones do. Aluminum does not have infinite fatigue life like ferrous metals do. Given enough time, aluminum rockers will fail.QUOTE]
Precisely.
Stainless steel IS a ferrous metal.
#6
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Car: 89 IROC
Engine: 305 TPI / ZZ4 cam
Transmission: Stage 2 700R4, LS1 driveshaft
Axle/Gears: Strange 3.42 w/ Auburn
Re: Roller Rockers Comp or Scorpion?
Thanks for the advise everyone. I'll be ordering a set of the Comps next week.
Might go 1.6 on the exhaust.
Might go 1.6 on the exhaust.
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Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
Re: Roller Rockers Comp or Scorpion?
As for the extra lift, make sure the springs can take it and you have enough clearance if you use 1.6's. The standard ratio is 1.52, so they give a slight increase in lift by themselves, and will give a noticiable increase in lift over standard stock stamped rockers since they dont flex.
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Car: 89 IROC
Engine: 305 TPI / ZZ4 cam
Transmission: Stage 2 700R4, LS1 driveshaft
Axle/Gears: Strange 3.42 w/ Auburn
Re: Roller Rockers Comp or Scorpion?
Good advise on the cleaning.
I might go 1.6 on the intake. Can't go 1.6 on the exhaust as the ZZ4 springs are only good for .540 lift.
Still better than stock.
I might go 1.6 on the intake. Can't go 1.6 on the exhaust as the ZZ4 springs are only good for .540 lift.
Still better than stock.
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Re: Roller Rockers Comp or Scorpion?
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