Comp XE262 and Stock vortecs
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From: Independence, MO
Car: 1991 Camaro RS
Comp XE262 and Stock vortecs
Jegs claims the stock vortec will take .475 lift. If this is true it should be safe to use vortecs with an XE 262 cam, or am I missing something?
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From: Moorestown, NJ
Car: 88 Camaro SC
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Transmission: TKO 500
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Thoretically youd have enough retainer to seal clearance, but youd still need better springs. Probably also would want to stake the studs at the very least.
Edit: Wasnt thinking, brains on vacation as usual.
Edit: Wasnt thinking, brains on vacation as usual.
Last edited by dimented24x7; Jan 19, 2005 at 12:25 PM.
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From: Independence, MO
Car: 1991 Camaro RS
Originally posted by ede
what are they refering the springs? then maybe so but springs isn't the limiting factor with vortecs
what are they refering the springs? then maybe so but springs isn't the limiting factor with vortecs
From the JEGS website...
Cast Iron Vortec Complete Assembly
Fast burn combustion chamber and high velocity ports combine to produce big horsepower out of the box by as much as 20-40 HP increase over earlier cast iron SB heads. Requires the Vortec style intake manifold. Fits all SBC engines 1955 to present, excluding LT1/ LT4 reverse coolant flow engines and current LS1 style engines. Comes completely assembled with valves, springs, retainers, and 3/8'' rocker studs. Requires the use of self-aligning rocker arms.
Material: Cast Iron
Intake Runner Volume: 170cc
Combustion Chamber Volume: 64cc
Vale Diameter: 1.94'' Int./ 1.50'' Exh.
Spark Plugs: Straight
Special Note: Valve Springs - .475 Max Lift
Fast burn combustion chamber and high velocity ports combine to produce big horsepower out of the box by as much as 20-40 HP increase over earlier cast iron SB heads. Requires the Vortec style intake manifold. Fits all SBC engines 1955 to present, excluding LT1/ LT4 reverse coolant flow engines and current LS1 style engines. Comes completely assembled with valves, springs, retainers, and 3/8'' rocker studs. Requires the use of self-aligning rocker arms.
Material: Cast Iron
Intake Runner Volume: 170cc
Combustion Chamber Volume: 64cc
Vale Diameter: 1.94'' Int./ 1.50'' Exh.
Spark Plugs: Straight
Special Note: Valve Springs - .475 Max Lift
Last edited by dennis6; Jan 19, 2005 at 02:44 PM.
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From: Grand Rapids, MI
Car: Z28
Engine: Sb2.2 406
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Axle/Gears: Ford 9" 3.60
The springs still aren't the limiting factor as far as lift is concerned. It is the distance between the bottom of the retainer and the top of the valve seal/guide boss. No spring, no matter what its max lift is, can change that fact as long as the factory installed height and the height of the factory guide boss remain the same.
I agree with the Pro Topline suggestion, if Vortecs are the route you are taking.
I agree with the Pro Topline suggestion, if Vortecs are the route you are taking.
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From: Independence, MO
Car: 1991 Camaro RS
Where do you suggest getting them from? Shaver racing heads used to be the place to go. However, it seems like they went out of buisness.
Last edited by dennis6; Jan 20, 2005 at 03:46 AM.
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From: Atlanta, GA, US of A
Car: 94 Z28
Engine: LT1 w/ headers, catback, CAI, tune
Transmission: 4L60E
Axle/Gears: 3.23s
I've been running the XE262 with untouched Vortecs for like 3 years now. No problems so far but it's pushing the lift limit. If/when I ever get some coin to spare to upgrade to 1.6 rockers I'll be swapping on the Crane spring/retainer set that is supposed to allow for more clearance between the retainer/valve guide boss without machining...
Anyway, since you're buying new it makes sense to go ahead and get a set of modified Vortecs, you'll come out ahead in the long run... But to answer your question you should be able to get away with the XE262 on the stockers as I have...
Oh and I believe www.competitionproducts.com has the Pro-Topline Vortecs.
Anyway, since you're buying new it makes sense to go ahead and get a set of modified Vortecs, you'll come out ahead in the long run... But to answer your question you should be able to get away with the XE262 on the stockers as I have...
Oh and I believe www.competitionproducts.com has the Pro-Topline Vortecs.
Last edited by Ray87Z; Jan 20, 2005 at 04:23 AM.
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From: Carson City Nevada
Car: 86 coupe
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just get the valve guide bosses trimmed,while you have the heads off,you might as well have the spring pockets enlarged to 1.44" for the good springs.it doesn't cost much.
Eric
Eric
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