Considering new top end combo, what cam?
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Joined: Nov 2000
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From: Newark, DE
Car: 86' Z28
Engine: 355
Transmission: T-56
Considering new top end combo, what cam?
i have a deal lined up at the end of the summer for a pair of Vortec heads. If i get them, i'll be going with the Perfomer intake for vortecs, and a Holley Avenger carb (im sick of the Q-jet). If i do this, what cam should i go to? I have a crane 272H in now, but im not incredibly satisfied with it, and i doubt it will cut it with new heads. Any thoughts?
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My 1986 Z28
GM350, T-5, 3.23's, lots of go fast goodies, 4th gen Firebird interior etc...
85 IROC w/ 1364 miles!
You'll always find what you've lost in the last place you look
R.I.P Dale Earnhardt
------------------
My 1986 Z28
GM350, T-5, 3.23's, lots of go fast goodies, 4th gen Firebird interior etc...
85 IROC w/ 1364 miles!
You'll always find what you've lost in the last place you look
R.I.P Dale Earnhardt
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Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
The Comp XE268 is widely used in conjunction with those heads. It is about all you can use without having a big mismatch to the intake.
Check the clearance from the bottom of the retainers you are planning on using, to the top of the valve guides. Any sort of a good cam will give you a potential problem there. But of course when you start having to do machine work to them, the "economy" of using them starts to vanish. That's one of the eproblems with those heads: they're not built as a "performance" head at all, no matter what the flow numbers of the castings themselves, they're a replacement truck head; and they come from the factory prepared as such. Once you buy them and then pay to have them turned into a true performance piece with screw-in studs, realistic valve spring pockets, clearance for high lift, light high-flow valves, high-quality valve guide seals, etc. etc., you could have bought a set of new aluminum ones that outflow them for not much more.
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"So many Mustangs, so little time..."
ICON Motorsports
Check the clearance from the bottom of the retainers you are planning on using, to the top of the valve guides. Any sort of a good cam will give you a potential problem there. But of course when you start having to do machine work to them, the "economy" of using them starts to vanish. That's one of the eproblems with those heads: they're not built as a "performance" head at all, no matter what the flow numbers of the castings themselves, they're a replacement truck head; and they come from the factory prepared as such. Once you buy them and then pay to have them turned into a true performance piece with screw-in studs, realistic valve spring pockets, clearance for high lift, light high-flow valves, high-quality valve guide seals, etc. etc., you could have bought a set of new aluminum ones that outflow them for not much more.
------------------
"So many Mustangs, so little time..."
ICON Motorsports
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