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  #16 (permalink)  
Old 12-18-2005, 12:14 PM
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Originally Posted by Mustangsaly
what cam would you recommend 4 a performance upgrade on a stock 5.7 vortec with carburetor & HEI ? a cam I won't have do any head machine work to for springs ect. I'm all 4 new springs & keepers, retainers ect. but don't want to do any head machine work for springs with more lift ect.

There has been input on this site about lift that vortecs can handle. Based on what I have read, the only way to know for sure is measure yours, then get a cam that will not ram the retainers into the valve seals.

You don't clearly state your intentions for this engine, so I personally prefer a CompCams XE series... probably 268* and definitely hydraulic lifters and their kit, Edelbrock Performer RPM intake for better low and midrange response.

If in doubt, stay small..... there is no better feeling than gut busting torque and snappy throttle response. How often will you be over 5000 rpm? 1-2 % of the time?

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Old 12-18-2005, 02:01 PM
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it's a roller cam block, so I just planed on changing cam and timing chain and running stock roller lifters, It will be street driven (prob hard) and see the 1/4mi strip to see what it will do. it's not a daily driver. I want this vortec to get me by till I can recuperate from the car restoration / build financially speaking,

I will run a high stall converter 2800 plus and low rear gears 411s in a narrowed ford 9" with A ladder bar rear suspension.

till I can build my planed, forged bottom end 383 with a nice set of alum performance heads.

I want, to run the vortec for a yr to a 1 1/2 yr time frame, till I can get my 383 built done out of my early 70s SBC 350 4 bolt main block. B4 i'm done with this vortec I would like to add a 75 shot of nos at the track. and I will have a set of Vortec Heads for my parts stash in the end.
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Old 12-22-2005, 09:56 PM
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ZZ4 cam is probably out without head mods. Lift on it is something like .475"/.510", and GM says stock Vortecs can't handle over .470".
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Old 12-22-2005, 10:42 PM
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How much would you guys pay for vortecs becuz Summit has a set of vortecs they sell for $650? They come with upgraded springs rated to .520 lift, 175cc intake ports, ,1.94/1.50 valves, and screw in studs. That's cheaper than some of the other aftermarket iron heads. I plan on running a set with the xe268 or maybe a voodoo262.
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